Mizan Ahmed

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Verified

Mizan verified their affiliation via an institutional email.

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• PhD
• Senior Lecturer at Curtin University

Traditionally, reinforced concrete (RC) walls are often designed as shear walls to provide lateral resistance. However, RC walls can be designed as load-carrying members to replace closely spaced edge columns in low-to-mid-rise buildings. Often, in order to facilitate service utilization, openings are made in these walls which may significantly imp...

In recent years, bridges with ultra-high piers (UHPs, the pier height of which ≥ 100 m) have been increasingly used in mountainous areas and may be subjected to impact loads such as rock falls. However, research on the impact performance of UHPs is very limited, and it is essential to understand their dynamic responses and failure modes under impac...

Reinforced concrete (RC) walls are mainly used in RC structures to resist gravity and lateral forces. These structural elements may need to be upgraded to withstand additional forces and extend their life cycle. Therefore, it is crucial to provide effective strengthening techniques using low-cost sustainable materials under optimal conditions to re...

Circular concrete-filled double steel tubular (CFDST) beam-columns have increasingly been used in tall composite structures and must be designed for fire safety. However, there is a lack of appropriate design methods for the fire safety design of such composite beam-columns because research work on their fire performance has been very limited. This...

Reinforced concrete (RC) deep beams are used in offshore platforms, bunker walls, and building load-bearing walls. Web openings are often necessary for accessibility or essential services. However, enlarging these openings due to architectural or mechanical requirements or changes in building function can significantly decrease shear capacity, posi...

Reinforced concrete deep beams (RCDBs) are vulnerable to brittle shear failure and can cause the beams to fail diagonally. This study investigates the effectiveness of shear-strengthening techniques in RCDBs by using galvanized corrugated sheets (GCS) filled with high-performance concrete (HPC). Engineered Cementitious Composites (ECC), strain-har...

Reinforced concrete (RC) columns are frequently strengthened due to the damage caused by environmental exposure, changes in loading conditions, or seismic upgrading. This paper presents experimental and numerical investigations into the behavior of circular RC columns strengthened using galvanized corrugated steel sheets (GCSS) filled with concrete...

Steel-concrete composite girder bridges utilize shear connectors to connect concrete deck slabs and steel girders. In current practice, the headed shear stud connector is the most used due to its reliability and ease of installation. Several studies are available on the static and fatigue behavior of welded-headed shear studs embedded in normal-s...

In this study, the effectiveness was investigated of shear strengthening techniques in reinforced concrete (RC) deep beams incorporating stainless steel plates (SSPs). Four RC deep beams were tested under incremental static loading until failure to examine the proposed strengthening techniques. The key parameters considered in this study included t...

Lateral confinement and high temperature affect the load-carrying capacity of a concrete member significantly. In a fire condition, a concrete member exhibits not only mechanical deformation but also thermal deformation. Therefore, accurately modeling the fire behavior of confined structural concrete is challenging. In this paper, a new three-dimen...

The internal circular steel tube provides considerable confinement to the core concrete in a Circular Concrete-Filled Double Steel Tubular (CCFDST) column exposed to fire. However, no constitutive model has been developed for the core concrete at elevated temperatures considering confinement. This paper develops a numerical modeling method for fire...

This paper investigates, experimentally and numerically, the shear strengthening of Normal Concrete (NC) beams using post-tensioning steel bars and Engineered Cementitious Composite (ECC) reinforced with chemically cured Palm Fronds (PFs). The benefits of strain-hardening ECC and the tensile strength of PFs cured with 6% wt Alkali NaOH solution bes...

Unlike the conventional reinforced concrete (RC) slab-column connection, the punching shear generated at the RC slab-to-steel column connection may lead to brittle punching shear failure due to the small area around the steel column. Moreover, the unexpected moments arising from eccentric loading can also lead to the failure of the slab in punchin...

Precast rectangular reinforced concrete (PRRC) beams are joined on construction sites using concrete in situ to achieve the desired length. Limited research exists on the effect of intermediate connection shapes and the types of infilled concrete on the flexural performance of PRRC beams. This paper presents a comprehensive experimental and numeric...

The insufficient lapped splice length of reinforcing bars due to the design or construction errors reduces both the flexural strength and ductility of Reinforced Concrete (RC) beams. The defected RC beams need to be strengthened to allow structures to be ductile and robust in their design life. This paper reports experimental and numerical investig...

The use of laminated fibers for strengthening of reinforced concrete (RC) beams is challenging due to bonding and compatibility issues, especially in cost-effectiveness and long-term performance scenarios. This study proposes a novel flexural strengthening technique for Normal Concrete Circular Beams (NCCBs) by incorporating Engineered Cementitious...

Square double-skin concrete-filled steel tubular (DSCFST) columns and concrete-filled double steel (CFDST) columns possess excellent load-carrying capacity and ductility. However, there has been limited research on the responses of DSCFST and square CFDST columns exposed to fire. This paper presents a series of tests on such columns loaded concentr...

This study investigates the behavior of deep reinforced concrete beams with openings strengthened using galvanized corrugated steel sheets (GCSS) and galvanized flat steel sheets (GFSS). An experimental program was conducted on ten deep beam specimens with different opening configurations, strengthened by externally bonded GCSS and GFSS around the...

This paper investigates the shear strengthening of simply supported deep beams using welded wire mesh and glass fiber mesh filled with strain-hardening cementitious composites (SHCC) concrete. Nine reinforced concrete (RC) deep beams were tested in this study to investigate different shear-strengthening techniques including the type of mesh (glass...

This paper presents an experimental study conducted on the behavior of drop-in anchors in uncracked concrete slabs. Both seismic (cyclic) load tests and static load tests to collapse are performed on drop-in anchors subjected to tension or shear forces. Three different anchor sizes are subjected to seismic qualification testing, followed by a stati...

Similar to steel-reinforced concrete structures, traditional concrete bridge barriers reinforced with steel bars suffer a common problem which is the corrosion of steel reinforcement and related deteriorations which shorten their service life. The maintenance, rehabilitation, and replacement of existing bridge barriers suffering from steel corrosio...

This paper investigates the mechanical properties of rubberized fiber-reinforced concrete (RuFRC) incorporating synthetic macro-structural fibers made of recycled plastics and waste tyre rubber shreds. The effects of different percentages of fiber doses 0%, 0.25%, 0.5% and 1% on the compressive, tensile and flexural strength of RuFRC are examined....

Reinforced concrete columns may need to be strengthened to support additional load arising from structural upgrades of existing structures or for retrofitting purposes. There is an increasing demand for sustainable and durable construction materials and techniques for strengthening and retrofitting purposes. Existing studies proposed additional jac...

Cold-Formed Steel Lipped (CFSL) channels are susceptible to a localized failure mechanism known as web crippling, triggered by concentrated loads or reactions applied to the web of the section. These loads induce buckling and distortion in the web, ultimately leading to the member's collapse. It is a challenging task to accurately determine the web...

This paper aims to develop a unique artificial neural network (ANN)-based equation as well as MATLAB-and Python-based graphical user interfaces (GUIs) using the most comprehensive and up-to-date database for predicting the behaviour of axially loaded concrete-filled double skin tubular (CFDST) short and slender columns with normal-and high-strength...

The increased awareness of sustainability and concerns about global warming have prompted the construction industry to explore green sustainable materials such as geopolymer composites as an eco-friendly alternative to ordinary Portland cement (OPC). This study developed ambient-cured lightweight geopolymer composites (LWGPCs) by incorporating diff...

In this study, the effect of residual stresses on the free vibration response of structural steel sheets is investigated for the purpose of structural health monitoring. Residual stresses are introduced into the structural steel sheet through a prestressing process known as dimple formation. The material properties of a rimmed steel disk were initi...

Circular concrete-filled steel double-tube (CFSDT) columns have shown excellent ductility and load-carrying capacity. However, research on the fire resistance of CFSDT columns is still limited. This paper presents the fire tests, finite element (FE) modeling, behavior, and design of circular CFSDT columns and concrete-filled steel double-skin (CFSD...

This paper presents a computational model for determining the axial responses of short circular steel–reinforced concrete-filled steel tubular (SRCFST) columns. A novel confinement model is formulated for the concrete core, which is effectively confined by the external circular steel tube and the embedded steel section. The modelling scheme of the...

There is a growing public interest in exploring materials that can enhance the sustainability and durability of conventional steel reinforced concrete (RC) structures, such as geopolymer concrete (GPC) and steel-fibre reinforced polymer composite bars (SFCBs). GPC is produced with industrial waste such as fly ash and slag to replace ordinary Portla...

Residual stress is rarely considered as an initial condition for Finite Element Analysis (FEA), or used in the component design. A comprehensive numerical and experimental investigation into prestressed steel sheets is conducted. Residual stresses at specific locations were introduced into the steel sheets by dimple formation. FEA is used to simula...

This paper carries out experimental and numerical investigations on the axial performance of circular Reinforced Concrete (RC) precast slender columns with an intermediate connection. A series of tests are carried out to study the effects of longitudinal reinforcement ratio (ρ), and embedded length of steel bars (L b ) of precast columns on their a...

This study aims to investigate the local elastic buckling behavior of simply supported prismatic web plates under pure shear loading. Comprehensive finite element analysis is conducted to analyze the effects of various geometric parameters, such as tapering ratio, aspect ratio, and web slenderness, on the local elastic buckling behavior with simply...

Octagonal Concrete-Filled Steel Tubular (OCFST) columns combine the benefits of circular and square Concrete-Filled Steel Tubular (CFST) columns so that they not only possess higher strength and ductility but also provide the ease of connection to composite beams. However, research studies have been very limited on the performance analysis of OCFST...

The bends under sagging moments in a Reinforced Concrete Stair Beam (RCSB) in staircases may be damaged because of improper detailing design or construction; therefore, they need to be strengthened or repaired. The structural behavior of strengthened RCSBs has not been investigated adequately. This paper presents experimental and numerical investig...

This paper presents experimental study and finite element modeling of the flexural behavior of concrete beams reinforced with reused steel bars as longitudinal reinforcements. The experimental program and results of eight Reinforced Concrete (RC) beams constructed with and without reused steel bars are described in detail. The replacement percentag...

Rectangular concrete-filled steel tubular (RCFST) columns can be designed to have unequal wall thickness to maximize their resistance to combined axial and uniaxial bending loads. However, there is very little published research on their local–global interaction buckling behavior. This paper presents an efficient fiber-based simulation model for an...

This paper presents a fiber element analysis model that simulates the structural responses of square Steel-Reinforced Concrete-Filled Steel Tubular (SRCFST) short columns under concentric compression including local buckling effects. The method of effective widths is utilized to model the gradual post-local buckling of the steel tube walls of a SRC...

Suspended floors can be designed as effective pendulum seismic isolators for high-rise buildings. However, research studies on the free vibration of suspended laminated composite slabs are relatively limited. This paper presents a comprehensive analytical solution to the free vibration problem of suspended laminated composite slabs. The equations o...

Tapered steel plate girders are commonly used in large span industrial structures and composite bridges. The tapered thin steel web plates under stress gradients in such structures may be susceptible to elastic local buckling. An efficient and robust Artificial Neural Network (ANN) model is developed and presented in this paper for predicting the e...

At present, there is a lack of research on the influence of different dynamic constitutive models of steel and concrete on the dynamic mechanical properties of concrete-filled steel tubular (CFST) columns under lateral impact. In this paper, A comprehensive numerical study on the effects of different dynamic constitutive models of steel and concret...

This research presents a unified numerical model for analyzing the performance of concrete-filled stainless-steel tubular (CFSST) stub columns with different cross-sectional shapes. The model converts the cross-sections of the CFSST columns with various shapes into an equivalent circular column, and a new concrete constitutive relation is proposed...

This study investigates the performance and design of high-strength circular concrete-filled double-skin aluminum tubular (CFDAT) columns under axial loading. A new fiber element (FBE) model incorporating a new lateral confinement model is developed that considers the confinement effects and material nonlinearities. A new strength degradation facto...

Steel-Equal Angle (SEA) has recently been utilized as longitudinal reinforcement in high-strength concrete columns to improve their strength and ductility. However, investigations have been very limited on the responses of eccentrically loaded SEA Reinforced Concrete (SEARC) columns. This paper presents the development of a computer simulation mode...

Conventional steel bars in Reinforced Concrete (RC) square columns are utilized as longitudinal reinforcement and steel ties are utilized as transverse reinforcement for concrete confinement. The concrete confinement in RC columns with square section is less than that with circular section. Recently, Steel-Equal Angle (SEA) as longitudinal reinforc...

Steel equal-angle (SEA) can be used to replace the longitudinal reinforcement in concrete columns to improve their strength and ductility. However, as a novel concept of applying SEA as longitudinal reinforcement in concrete columns, experimental and numerical studies are very limited on the behavior of SEA reinforced high-strength concrete (SEARC)...

This research reports on Three Dimensional (3D) exact free torsional-bending vibrations and buckling of Timoshenko beams possessing homogeneous and nonhomogeneous properties and complex cross-section. The proposed exact solution is derived from 3D elasticity equations. The Hamilton’s integral equation is initially employed to establish the 3D exact...

This paper investigates the accuracy of the existing empirical design models and different machine learning (ML) models, known as Decision Tree (DT), Random Forest (RF), K-Nearest Neighbors (KNN), Adaptive Boosting (AdaBoost), Gradient Boosting Regression Tree (GBRT), and Extreme Gradient Boosting (XGBoost) in predicting the ultimate axial load of...

Strengthening of reinforced concrete (RC) structures may be required for several reasons and flexural strengthening of normal concrete (NC) beams is widely carried out using laminated fibres. However, the incompatibility of the concrete cover can lead to fibre debonding or concrete cover dislocation. These are some of the critical setbacks in commo...

This paper presents experimental and numerical investigations on circular concrete-filled double steel tubular (CFDST) members under flexural load. Seven specimens including five CFDST specimens were tested and the test parameters included the effects of concrete compressive strength, the thickness of the steel tubes, and the diameter ratio on thei...

A reinforced concrete (RC) beam-to-steel column composite joint may be subjected to torsional moments when two parallel RC beams are connected to the flanges of the steel I-section column with opposite positions. The excessive torsional moment may cause diagonal cracks in the RC beam and reduce its capacity. No studies have been reported on the eff...

Square spiral-confined reinforced concrete-filled steel tubular (SCRCFST) columns have recently been proposed as a new form of composite columns. The additional confinement exerted by the spiral reinforcements improves the strength and ductility of a square SCRCFST column compared to a square concrete-filled steel tubular (CFST) column. However, th...

This paper is concerned with the computational simulation, nonlinear inelastic behavior, and structural design of circular concrete-filled stainless-steel tubular (CCFSST) short columns subjected to axial compression accounting for confinement effects. A new confinement model is proposed for confined concrete based on extensive experimental data on...

This paper presents an investigation on the efficiency of steel tubes in reinforcing self-compacting concrete (SCC) columns. A theoretical model is developed to study the axial behavior of SCC columns reinforced with steel tubes, considering the effects of confinement on the filled concrete by steel tubes and concrete core confined by spirals. The...

This paper investigates the shear strengthening of reinforced concrete (RC) beams incorporating engineered cementitious composite (ECC) and stainless steel plates (SSPs). The use of ECC, characterized by strain-hardening in conjunction with SSPs, was investigated in this study to improve the shear performance of RC beams. Total 10 RC beams were tes...

Concrete-filled aluminum tubular (CFAT) columns inherit superior mechanical performance in terms of strength and ductility and offer excellent corrosion resistance. However, due to the limited investigation, the performance of CFAT columns has not been fully understood yet. This paper presents a new fiber element (FBE) model for nonlinear analysis...

A three-dimensional (3D) finite element (FE) model based on thermal-elastic-plastic approach in SYSWELD® was employed to investigate the effects of welding sequences on induced residual stresses and radial distortion in AISI 316L stainless steel welded pipes. To mesh the model, the HYPERMESH® processor was utilized and the model was then exported t...

This paper describes experimental and numerical investigations into the structural behavior of circular concrete-filled double steel tubular (CCFDST) slender columns loaded concentrically to failure. Test results on 8 specimens including 6 CCFDST slender columns and 2 CCFDST short columns are reported in this study that demonstrate the influences o...

A square concrete-filled double steel tubular (CFDST) column composed of a circular core concrete-filled tube offers the advantages of both square and circular concrete-filled steel tubular (CFST) columns. However, limited tests were performed to investigate the axial performance of CFDST slender columns. This paper investigates the behavior and de...

Thin walled square concrete filled double steel tubular (CFDST) columns composed of the inner circular tube filled with concrete can be used to carry the large axial loads or strengthen existing CFST columns in composite constructions. This paper reports an experimental program carried out on short square CFDST columns loaded concentrically. The in...

A Levi-type analytical solution procedure is developed to characterize static and dynamic deformation response of smart laminated simply-supported composite rectangular plates induced by inclined piezoelectric actuators under (1) constant electrical voltage and (2) time-dependent electrical voltage with excitation frequency. The key to development...

This paper develops a simplified fiber-based numerical model to investigate the performance of circular concrete-filled stainless steel tubular (CFSST) short columns subjected to axial loading. A new compressive concrete strength formula is developed based on the test data of CFSST columns. The accuracy of the numerical model is evaluated by compar...

This paper reports an experimental work carried out on the square concrete-filled double steel tubular (CFDST) slender columns with an inner circular tube under concentric loading. The influences of the column slenderness ratio and the thickness of the inner steel tube on the performance of the square CFDST slender column are investigated. The appl...

This paper presents an experimental investigation on circular concrete-filled double steel tubular (CFDST) slender columns under axial loading. The test parameters include the column slenderness ratio and the thickness of the inner steel tube. Test results show that the common failure mode of CFDST slender columns is the global failure of the colum...

In the manufacturing of modules off-site, steel fabrication often comes with many challenges, including supply chain reliability and clarity, the need for efficient production at both the steel producer and the modular builder end, and the flexibility for customisation. This project looked for new methods of efficient production and new ways of co...

Dear Colleagues, Steel–concrete composite structures are widely used in composite construction, owing to their improved structural performance, such as higher load-bearing capacity, higher ductility, and improved fire and seismic performance. This special issue of CivilEng deals with the recent innovations and progress in the research and practice...

Circular concrete-filled double-skin steel tubular columns (CFDST) with external stainless-steel are high-performance composite columns that have potential applications in civil construction including the construction of offshore structures, bridge piers and transmission towers. Reflecting the limited research performed on investigating their mecha...

This paper presents experimental and numerical studies on the axial compressive behavior of square concrete-encased concrete-filled steel tubular (CECFST) short columns composed of a circular inner steel tube. Tests on six full-scale short CECFST columns with the inner circular tube diameter varying from 320 mm to 500 mm were carried out to study t...

Rectangular concrete-filled double-skin steel tubular (CFDST) columns consisting of stainless-carbon steel tubes are high-performance composite columns that offer high corrosion resistance in harsh environments and have a wide range of applications in the construction industry. However, the buckling resistance of CFDST short and slender columns has...

This paper investigates the structural performance of concrete-filled stainless steel tubular (CFSST) columns composed of rectangular and square sections. A fiber-based mathematical model is developed to simulate the nonlinear performance of such columns loaded concentrically accounting for the local buckling of steel tube. An accurate lateral pres...

This paper investigates the axial compressive performance of concrete-filled double steel tubular (CFDST) short columns composed of circular section loaded concentrically. An experimental program comprised of compression tests on short columns is carried out to examine their structural performance. Axial compression tests on conventional concrete-f...

Circular concrete-filled double steel tubular (CFDST) column is a high-performance composite column that has significant potential to be used in the construction of high-rise composite structures. This paper presents experimental and strength computational investigations on CFDST short columns that are subjected to eccentric compression load. A tot...

The behavior of fiber-reinforced polymer (FRP)-confined recycled aggregate concrete-filled steel tube (RACFT) columns is barely studied. Especially, that of slender specimens has not been investigated so far. In this article, an experimental test of FRP-confined RACFT slender square columns was conducted to study the influences of recycled aggregat...

Hexagonal concrete-filled steel tubular (HCFST) columns have been used to carry large loads in tall composite buildings. Their behavior and strength are different from those of circular and square concrete-filled steel tubular (CFST) columns due to the confinement effect. This article describes a computational modeling method of nonlinear fiber ana...

The accurate prediction of the concrete confinement effects in concrete-filled double-skin steel tubular (CFDST) columns composed of a circular section is vital in stimulating their true structural performance. However, existing concrete confinement models for such columns were developed based on limited studies and may not accurately predict their...

Elliptical concrete-filled stainless steel tubular (CFSST) columns are high-performance composite columns that have the enormous potentiality to be used in composite construction in the near future. However, to date, limited studies on the performance analysis of such columns under axial compression have been performed taking into account the accur...

In this paper, the structural behavior of concrete-filled double steel tubular (CFDST) stub columns composed of square hollow sections is investigated experimentally and numerically. The experimental program comprises compression tests on short columns loaded concentrically. The test parameters mainly focused on the influences of the width-to-thick...

A circular concrete-filled double steel tubular column (CFDST) with a square hollow section (SHS) as an inner tube is introduced as a new form of a composite column in the paper. A series of axial compression tests that are carried out on this new type of composite column is reported in this study. Three-dimensional models based on the finite eleme...

The concrete confinement induced by the steel tube of a concrete-filled steel tubular (CFST) column depends on its cross-sectional shape. The mechanism of confinement in octagonal CFST columns differs considerably from that in circular or square CFST columns. It is therefore important to ascertain the confinement effect in octagonal CFST columns to...

A circular concrete-filled double steel tubular column (CFDST) with a square hollow section (SHS) as an inner tube is introduced as a new form of a composite column in the paper. A series of axial compression tests that are carried out on this new type of composite column is reported in this study. Three-dimensional models based on the finite eleme...

The behavior of thin-walled round-ended concrete-filled steel tubular (RECFST) short columns loaded axially is characterized by the local-buckling of the flat steel walls and the concrete confinement exerted by the round-ended steel walls. A numerical modeling method implementing fiber analysis is presented in this paper for the determination of th...

The confinement mechanism in elliptical concrete-filled steel tubular (CFST) columns differs considerably from that in circular or rectangular CFST columns. It is essential to quantify this confinement effect in elliptical CFST columns in order to accurately predict their structural responses. This paper describes a computational model utilizing th...

The hollow circular steel tubes support the permanent and construction loads of several upper floors during the construction of a high-rise building structure before the concrete is filled into the steel tubes to form circular concrete-filled double steel tubular (CFDST) columns. The preloads acting on the steel tubes may cause a marked reduction i...

Concrete-filled double steel tubular (CFDST) columns are high-performance composite columns, which have increasingly been used in high-rise composite buildings and bridges as well as in strengthening conventional concrete-filled steel tubular (CFST) columns. The additional confinement provided by the inner circular tube in CFDST columns considerabl...

The concrete confinement provided by the circular steel tubes improves the performance of circular concrete-filled double steel tubular (CFDST) columns, which have increasingly been employed as high-performance structural members in tall buildings. This paper presents computational and design models for the simulation and design of high strength CF...

Thin-walled square and circular hollow steel tubes are designed to support the permanent and construction loads of several upper composite floors before filling the concrete into the tubes to form concrete-filled double steel tubular (CFDST) columns. The influences of preloads acting on the steel tubes on the structural responses of slender square...

Rectangular concrete-filled double steel tubular (CFDST) columns have increasingly been utilized in high-rise buildings to support heavy loads. However, the responses of eccentrically loaded rectangular CFDST short columns have rarely been studied. This paper reports experimental and numerical investigations into the behavior of rectangular thin-wa...

Square high strength concrete-filled double steel tubular (CFDST) slender columns composed of an internal circular steel tube are increasingly used in tall composite buildings to carry heavy loads. However, thin-walled slender CFDST columns subjected to eccentric loading may fail by the local-global interaction buckling, which significantly reduces...

Circular concrete-filled double steel tubular (CFDST) columns in high-rise building structures possess high ductility and strength performance owing to the concrete confinement exerted by the external and internal circular steel tubes. However, the behavior of circular CFDST short columns that are loaded eccentrically has not been investigated eith...

Square concrete-filled double steel tubular (CFDST) beam-columns consisting of an internal circular steel tube have increasingly been utilized in composite building structures because of their high structural performance. This paper describes experimental and numerical studies on the structural responses of square thin-walled CFDST columns loaded e...

High-strength square concrete-filled double steel tubular (CFDST) slender beam-columns with a circular internal steel tube subjected to eccentric loads may undergo interaction local-global buckling. No computational studies on the interaction local-global buckling of slender square CFDST beam-columns have been reported and their behavior has not be...

Circular high-strength concrete-filled double steel tubular (CFDST) columns are high performance members where the internal and external steel tubes offer significant confinement to the concrete infill. The confinement remarkably improves the concrete compressive strength and ductility. However, no fiber element models have been formulated for comp...

A numerical model considering confinement effects has been developed and presented in a companion paper for computing the axial load-strain responses of circular concrete-filled double steel tubular (CFDST) short columns under axial loading. This paper presents the verification of the numerical model proposed and a parametric study. Existing experi...

The confinement provided by the inner and outer steel tubes to the core concrete significantly increases the load-carrying capacity and ductility of circular concrete-filled double steel tubular (CFDST) columns. The confinement models for conventional concrete-filled steel tubular (CFST) columns may underestimate the ultimate strength of CFDST colu...

Social vulnerability can be defined as potential loss to a social group arising from a hazard. It is a term that is broadly used in the context of hazard studies and a key factor in the development of hazard mitigation strategies. Due to spatial and temporal variations in the characteristics of communities, social vulnerability differs from society...