Siti Aminah Osman

• Bachelor of Engineering
• Head of Department at National University of Malaysia

This research collected and summarized a total of 455 experimental tests of axially loaded square and rectangular concrete-filled steel tubular (CFST) stub columns. The recently published papers were used to evaluate the current design equations from four international standards, namely the American Concrete Institute (ACI) code, British Standard (...

Two standards that are widely used by many countries in designing offshore gas transmission pipelines are American Standard – ASME B31.8, Gas Transmission and Distribution Piping Systems and Norwegian Standard – DNVGL-ST-F101, Submarine Pipeline System. A thorough understanding of these standards is vital in determining optimal pipeline design to e...

Recently, the concrete-filled twin-layer steel-sheet composite wall systems (TSCWs) have become recommended by the engineers in the modern structures, since it has high energy absorption, ductility, and capacity compared to the corresponding conventional wall systems. Therefore, this paper presents and discusses the literature of researches particu...

Corrugated steel shear wall (CSSW) has higher ductility, energy dissipation capacity and toughness compared to the conventional steel plate shear wall (SPSW). The corrugation steel plate can be either installed vertically or horizontally. In recent decade, several experimental and numerical studies have investigated the effect of the corrugation an...

Corrugated Steel Shear Wall (CSSW) is an efficient shear wall system, which has higher energy dissipation capacity, ductility and stiffness when compared to the Steel Plate Shear Wall (SPSW) with flat infill plate. Despite of these advantages, the ultimate load of CSSW is lower than that of SPSW. Various studies conducted to improve the cyclic beha...

Green roofs are known as an effective and sustainable design tool to mitigate urban heat island (UHI) effects. Generally, green roofs can be categorized as intensive and extensive roofs based on their purpose, design and characteristics. Green roofs built with several different layers and thicknesses depending on the roof type, the aim of the desig...

Green roof application provided sustainable actions to mitigate the impact of urbanization and climate changes. Conventional and green roof simulations were conducted by EPA SWMM software to obtain the rainfall infiltration and flow rates. The study also looks into the effect of roof gradient on the rainfall-runoff. The results show that the runoff...

Openings in steel plate shear walls (SPSWs) are usually used for decorative designs, crossing locations of multiple utilities and/or structural objectives. However, earlier studies showed that generating an opening in an SPSW has a negative effect on the cyclic performance of the SPSW. Therefore, this study proposes tripling or doubling the steel-s...

The studies of seismic isolation have gradually become important particularly in countries of active seismicity activity. The main idea of isolation is to provide flexibility to the structural foundation as well as to absorb energy and mitigating ground acceleration generated from earthquake forces. However, the cost to manufacture conventional com...

The studies of seismic isolation have gradually become important particularly in countries of active seismicity activity. The main idea of isolation is to provide flexibility to the structural foundation as well as to absorb energy and mitigating ground acceleration generated from earthquake forces. However, the cost to manufacture conventional com...

The behavior of concrete filled steel tubular (CFST) elements with different types of stiffening measures has been wildly investigated during the past two decades through experimental, analytical, and numerical approaches. The previous studies highlighted the importance of the presence of internal and external stiffeners to enhance the structural p...

The seismic behavior of full-scale exterior reinforced concrete (RC) beam-column joints retrofitted with externally bonded Carbon Fiber Polymers (CFRP) is examined in this paper. Casting and testing of two similar reinforced concrete beam column connections in the absence of transverse reinforcement at the joints took place under opposing cyclic lo...

Concrete-filled steel tube (CFST) structural members have been widely used in engineering projects for their superior strength and ductility. However, the different lateral dilation characteristics between concrete infill and steel tube have caused imperfect composite interaction during the early loading stage. To overcome this issue, external stee...

Kenaf (Hibiscus Cannabinus L.) fibres are thermally and alkali treated to enhance the interfacial bond between the fibre-matrix, the mechanical properties of the fibre itself, the fibre-reinforced thermally activated alum sludge ash (AASA) and the nanosilica (NS) blended cementitious composites. The tensile strength of treated fibres increases by a...

The accumulation of polyethylene terephthalate (PET) waste from single use of drinking water bottles and fly ash (FA) generated from power stations has become the main threats to the environment every year. The cement production increases with increasing concrete demand worldwide, thereby increasing pollution caused by emission of CO and CO2 from m...

This paper highlights the physical and chemical surface modifications of plant fibre (PF) for attaining suitable properties as reinforcements in cementitious composites. Untreated PF faces insufficient adhesion between the fibres and matrix due to high levels of moisture absorption and poor wettability. These conditions accelerate degradation of th...

This paper investigates the effect of thermally activated alum sludge ash (AASA) and nanoclay (NC) inclusion at various proportions on the mechanical properties and microstructure of kenaf fiber (KF) blended cementitious composites (KFRBCC). The first objective is to establish a blended cementitious (BC) composite with high mechanical strength. The...

In general, the concrete suffering of brittleness and weakness to resist the direct and tensile stresses. In Malaysia, millions of tons of the polyethylene terephthalate (PET) plastic waste accumulated from the single use of drinking water bottles, its accumulation creates threat on the civilian life and the environment. Inclusion of shredded PET...

This paper investigates the efficiency of Tuned Liquid Dampers (TLDs) in mitigating dynamic responses of vertically irregular structures. For this purpose, a three-story steel structure was specifically designed and subjected to free and forced vibration tests. In addition , the dynamic responses of eight structure-TLD systems were investigated thr...

This paper investigates the effect of normal curing (NC), air curing (AC), and burlap curing (BC) under different curing periods on the mechanical strength and durability of kenaf fibre reinforced blended cementitious composites (KFRBCC) with thermally activated alum sludge ash (AASA). The aim is to determine the most efficient condition and period...

The inclusion of plastic wastes in concrete to improve the properties of hardened concrete and overcome the brittleness problem has attracted much research interest. The residues of mineral water plastic bottles and beverage containers made from polyethylene terephthalate (PET) are a considerable source of solid wastes. A potential method of managi...

This paper is concerned with passive fire protection method of protective concrete mix that is made up of fly ash, polypropylene fibre, and nano-silica. Nano-silica is focused on as the innovative material to be used in the composition of the protective concrete mix. The previous experimental studies which analyse the performance of passive fire pr...

This paper presents the development of finite element (FE) models to simulate the behavior of diagonally stiffened steel plate shear wall systems (SPSWs) with differently shaped openings subjected to a cyclic load. This walling system has the potential to be used for shear elements that resist lateral loads in steel-framed buildings. A number of ½-...

Twenty undergraduate students from the Department of Civil and Structure Engineering (JKAS) implemented a STEM Educational Model by innovative sustainable home (iG-HOME) with 40 pupils from Sekolah Menengah Kebangsaan Bandar Tasik Kesuma, Selangor, Malaysia. iG-HOME was introduced as a novel approach in the effort to nurture students’ interest in S...

This paper discusses the effectiveness of the industrial training from the perspective of students who have undergone 12 weeks of industrial training. A questionnaire was distributed to 47 Third Year students at the Civil and Structural Engineering Department (JKAS), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM)...

In recent times, there is an increasing need for the fabrication of mortar and concrete that can be characterised as sustainable and environmentally friendly. Ideally, this concrete should be inexpensive, lightweight, and outstanding in terms of its physical and mechanical specifications. Plastic materials have increasingly been used in the fabrica...

The purpose of this research is to investigate the effect of Recycle Tire Isolator (RTI) as earthquake resistance system for low rise buildings in Malaysia. Most of the earthquake’s victims are due to the collapse of poorly designed concrete and masonry buildings. Therefore, an economical but reliable RTI is introduced to solve the problem in most...

The aim of this study is to investigate the behavior of hidden corbel precast beam to column connection due to cyclic loading by conducting laboratory test. Two types of connections were selected namely monolithic connection and hidden corbel connection. Both of the connections were having the same size of 100 mm × 100 mm × 1200 mm (Base × Width ×...

Students' skills and competency serve as a vital requirement that can contribute to their marketability. It can be directly formed in lectures or indirectly through exposure and competition students engaged in. To build and nurture the skills and competency of the students in the Civil and Structural Engineering Department, a bridge model competiti...

Students' understanding of foundational concepts in fundamental courses is important as it is a pre-requirement for proceeding to any advanced and specific courses in any degree programme. Despite high passing rates in most universities, students actually do not really have a good understanding of the course content, especially in fundamental cours...

This study uses descriptive data to assess students' perceptions about the differences between the two programmes offered by the Department of Civil and Structural Engineering (JKAS). The programmes offered are Civil and Structural Engineering (CSE) and Civil and Environmental Engineering (CEE). Confusion about the name may be the key issue affecti...

This paper presents a finite element (FE) model, which is validated and developed to simulate the axial load behavior of an existing experimental composite wall consisting of double-skinned profiled steel sheet (PSS) in-filled with normal concrete. This type of wall is designed to resist the axial load in the composite structure buildings. The perf...

The behavior of double-skinned composite walls (DSCWs), with or without infill materials, has been extensively investigated during the past few decades through analytical, experimental, and numerical methods. These investigations have resulted in new design methods for primary design objectives as well as time saving and economical purposes. This p...

Cable-stayed bridges generally having common defects such as excessive vibration due to wind action, corrosion and fatigue occurred at the cables supporting member. This study presents two different approaches for the demonstration of the damping effect due to wind action on cable-stayed bridge. The fi rst approach uses a simplifi ed analysis metho...

The steel-concrete composite beam has become very popular these days and deterioration of the composite beam and its ultimate limit state are often reported in the subjection of combined negative bending and axial tension. Due to the presence of high axial loads, it was given a guideline in a previous research study by experimental investigation su...

This study is concerned with 18 precast concrete beam-column connections incorporating embedded steel box-section using Finite Element (EF) modelling. The variables considered were: length and width of the embedded steel member. The results indicate that connection containing a wider flange of the embedded member can resist more vertical loading. A...

This study investigates the axial load behavior of an existing composite wall consists of a double-skinned profiled steel sheet in-filled with normal concrete. Three different composite walls in three-dimensional finite element models were developed, i.e. profiled steel sheet (PSS), core concrete, and the full composite wall system. The models were...

When reinforced concrete (RC) beams are found deficient in flexure, and fails in shear capacity after shear strengthening, the need to use new technique for flexure strengthening become important. Over the years, there are many experimental studies had been carried out with this technique of strengthening, and finding from other researchers have pr...

In the analysis of a free-standing staircase with slab elements, approximate analytical methods are sometimes used because of the absence of specific code provisions due to their inherent limitations. These approaches, however, cannot predict the actual three-dimensional (3D) behavior of the stair slab system. In addition, analytical methods cannot...

The paper is concerned with an experimental investigation on simply supported steel-concrete composite plate girders containing web openings. Ten composite plate girders were tested to failure in order to study their ultimate strength behaviour. Effect of web openings on the ultimate load behaviour of composite plate girders is of primary concern i...

Numerical study of concrete-filled steel composite (CFSC) stub columns with steel stiffeners is presented in this paper. The behaviour of the columns is examined by the use of the finite element software LUSAS. Results from nonlinear finite element analyses are compared with those from corresponding experimental tests which uncover the reasonable a...

Cable-stayed bridges are one of the most popular types of long-span bridges. The structural behaviour of cable-stayed bridges is sensitive to the load distribution between the girder, pylons, and cables. The determination of pretensioning cable stresses is critical in the cable-stayed bridge design procedure. By finding the optimum stresses in cabl...

Cable-stayed bridges have been developing rapidly in the last decade and have become one of the most popular types of long-span bridges. One of the important issues in the design and analysis of cable-stayed bridges is determining the pre-tensioning cable forces that optimize the structural performance of the bridge. Appropriate pre-tensioning cabl...

This study highlights the effect of membrane action in improving load carrying capacity of Profiled Steel Sheeting Dry Board (PSSDB) floor system. PSSDB system is a lightweight composite structural system composed of profiled steel sheeting and dry board, attached together by self-drilling and self-tapping screws. Many literatures have reported tha...

The objective of this study is to investigate analytically the performance of self-centring precast segmental bridge columns with shape memory alloy (SMA) starter bars under nonlinear static and lateral seismic loading. For this purpose, a 3D finite element model for hybrid post-tensioned bridge column has been developed. The precast post-tensioned...

Finite element (FE) models are developed to investigate the axial load behavior of a composite wall that consists of a double-skinned profiled steel sheet (PSS) in-filled with normal concrete and strengthened with embedded rectangular cold-formed steel (CFS). In this study, axial load behavior is compared between the FE models and an existing exper...

Precast bridge columns have shown increasing demand over the past few years due to the advantages of such columns when compared against conventional bridge columns, particularly due to the fact that precast bridge columns can be constructed off site and erected in a short period of time. The present study analytically investigates the behaviour of...

The study is concerned with normal-strength concrete corbels. 30 such corbels were studied by finite element modelling and the variables considered include ratios of primary and secondary reinforcement, type of applied loading, vertical or horizontal. Finite element modelling with a software package LUSAS was used to analyse four series of corbels...

This paper presents the results of investigation on structural behavior of the load bearing walls of interlocking bricks system called Brickcool. The model of Brickcool load bearing walls with and without reinforcement were tested in the laboratory until they failed. Both models were prepared with the same dimension of 1.3 m height, 1.0 m wide and...

Undergraduate student industrial training programs in the engineering industry are mutually beneficial relationships that helps nurture student growth, enhance university-industry relationships, and challenge the faculty to include up-to-date information in the teaching curriculums. The engineering discipline in particular requires graduates to be...

Slender structural floors could experience irritating vibration problems due to human walking load and so, vibration acceptability of such floors is an essential subject in addition to the usual strength criterion. This paper focuses on the dynamic response of a lightweight composite structural system known as Profiled Steel Sheet Dry Board (PSSDB)...

Finite element (FE) modelling is a prominent way to simulate both static and dynamic characteristics of cable-stayed bridges to understand their structural complexities. Many initial FE models have not been successful in the analysis of the structural behaviour of cable-stayed bridges. This paper presents the details of an updated FE modelling proc...

This paper presents the Rasch Measurement Model to determine employer perceptions of student ability during industrial training. A questionnaire survey was completed by 280 students from four departments (JKAS, JKMB, JKKP, and JKEES) in the Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM). The survey consists of 20...

Today's engineering education demands in-depth theoretical knowledge as well as hands-on exposure to the profession. Traditionally, theoretical engineering education is achieved in campus through direct teaching and laboratory learning. However, hands-on exposure or real world confrontation provides engineering students with on-the-job experience....

This study examines the effect of different variables of Profiled Steel Sheet (PSS) on various aspects of Profiled Steel Sheet Dry Board (PSSDB) system. PSS is an important component of PSSDB. The sensitivity of PSS variables at the 70% to 140% of Peva45 dimensions, the profiled steel sheet at local markets, to the cross-sectional area of PSS, the...

The paper presents an analytical method to determine the ultimate shear capacity of composite plate girders containing web openings. Since one of the flanges of the steel girder is connected to reinforced concrete slab through shear connectors the behavior differs from that of a bare steel plate girder. The analysis of such behavior is complex and...

This paper focuses on the performance of a special kind of tapered composite columns, namely tapered concrete-filled steel composite (TCFSC) slender columns, under axial loading. These efficient TCFSC columns are formed by the increase of the mid-height depth and width of straight concrete-filled steel composite (CFSC) slender columns, that is, by...

Measurements on students' understanding in the fundamental courses of Civil & Structural Engineering Program is an important step in determining the level of student achievement before they can proceed to advanced courses. Hence, this paper presents the level of students' understanding in the examination of the fundamental courses at the Department...

The present study has investigated the finite element method (FEM) techniques of composite beam subjected to combined axial tension and negative bending. The negative bending regions of composite beams are influenced by worsen failures due to various levels of axial tensile loads on steel section especially in the regions near internal supports. Th...

Recently steel extended end plate connections are commonly used in rigid steel frame due to its good ductility and ability for energy dissipation. This connection system is recommended to be widely used in special moment-resisting frame subjected to vertical monotonic and cyclic loads. However improper design of beam to column connection can leads...

One of the inherent modelling problems in structural engineering is creep of quasi-brittle materials such as concrete and masonry. The creep strain represents the non-instantaneous strain that occurs with time when stress is sustained. It has long been known that creep in brickwork results in deformations that increase gradually over time, and depe...

This paper is concerned with the investigation of concrete-filled steel composite (CFSC) stub columns with bar stiffeners. In order to study the behaviour of the columns, the finite element software LUSAS is used to conduct the non-linear analyses. Results from the non-linear finite element analysis and the corresponding experimental test are compa...

This paper investigates the natural frequencies of the profiled steel sheet dry board (PSSDB) system. Frequency response functions (FRFs), estimated experimentally, were used to determine the natural frequencies of three different PSSDB panels with different screw spacing. Finite element models (FEMs) were developed to predict the natural frequenci...

This paper investigates the behaviour of axially loaded stiffened concrete-filled steel composite (CFSC) stub columns using the finite element software LUSAS. Modelling accuracy is established by comparing results of the nonlinear analysis and the experimental test. The CFSC stub columns are extensively developed using different special arrangement...

Profiled steel sheeting dry board (PSSDB) system is a lightweight composite structural system that made of the profiled steel sheeting (PSS) connected to the dry board (DB) by self-drilling and self-tapping screws. The objective of this paper is to study the effect of membrane action in improving the flexural capacities of the PSSDB system. Accordi...

In this study, the seismic performance of self-centring precast segmental bridge columns with shape memory alloy (SMA) bars are analytically investigated. Nonlinear finite element analyses are conducted. This is shown that the self-centring bridge columns have high lateral seismic demands due to their low energy dissipation which is undesirable. SM...

In this study, the seismic performance of self-centring precast segmental bridge columns with shape memory alloy (SMA) bars are analytically investigated. Nonlinear finite element analyses are conducted. This is shown that the self-centring bridge columns have high lateral seismic demands due to their low energy dissipation which is undesirable. SM...

This study analytically investigates the seismic behaviour of post-tensioned precast segmental columns comparing with conventional monolithic bridge columns. For this purpose, 3D nonlinear finite element ANSYS software is employed. In this study, the numerical results of quasi-static analysis are compared and validated with the experimental results...

This study analytically investigates the seismic behaviour of post-tensioned precast segmental columns comparing with conventional monolithic bridge columns. For this purpose, 3D nonlinear finite element ANSYS software is employed. In this study, the numerical results of quasi-static analysis are compared and validated with the experimental results...

The model tuning through sensitivity analysis is a prominent procedure to assess the structural behavior and dynamic characteristics of cable-stayed bridges. Most of the previous sensitivity-based model tuning methods are automatic iterative processes; however, the results of recent studies show that the most reasonable results are achievable by ap...

Finite element analysis (FEA) is an advanced numerical method of analysis in structural engineering. In most universities around the world, FEA is offered at undergraduate and postgraduate level due to vast amount of complex theoretical problems, which are beyond the capacity of students. This paper presents the observations and experiences on the...

Engineering Accreditation Council (EAC) has emphasized that Outcome Based Education (OBE) learning approach is to be adopted for all engineering programs at the Higher Learning Institutions (IPTA) in Malaysia. OBE calls for the evaluation of the Course Outcomes (CO) as specified in the program specification. This study aims to assess the students’...

Industrial training program is a prerequisite course for all undergraduate students in the Faculty of Engineering & Built Environment (FKAB), Universiti Kebangsaan Malaysia (UKM). By having this training program, students are exposed to the responsibility of an engineer and engineering profession. This study was carried out to compare the students’...

The process of accreditation by Engineering Accreditation Council Malaysia (EAC) and BEM is purely based on manual of Engineering Programme Accreditation Manual. This process consumes high commitment, cost and time by academicians and support staff in preparing the document that may divert their attention from performing their real task of teaching...

This paper describes a measurement model used to measure the students’ performances in the Department of Civil and Structural Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM). The assessment model was developed based on students mark entries together with Rasch Measurement Model; it can be used to meas...

This paper deals with the structural behaviour of tapered concrete-filled steel composite (TCFSC) columns under eccentric loading. Finite element software LUSAS is used to perform the nonlinear analyses to predict the structural behaviour of the columns. Results from the finite element modelling and existing experimental test are compared to verify...

This paper is concerned with the ultimate shear capacity of steel-concrete composite plate girders in which one of the flanges of the steel girder is connected to reinforced concrete slab through shear connectors so that the steel girder and the slab act compositely as a single unit. The analysis of such girders becomes complex and it is necessary...

This paper describes the experimental work conducted at Universiti Kebangsaan Malaysia to examine the capability of the profiled steel sheet dry board (PSSDB) system to develop the compressive membrane action (CMA) in the floor. The development of the CMA inside the floor is strictly associated with the horizontal movement of the slab end under the...

This study aims to assess the students’ achievement of program outcomes (POs) for the Reinforced Concrete Design Course. The POs achievement for students in session 2009/2010 is evaluated and then compared with the previous session of 2008/2009. The course was selected as it is a compulsory course for all students in the Department of Civil and Str...

Every student in the Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM) is required toundergo an industrial training. This survey was conducted after the students have completed their five months industrial training in 2009. The survey aims to get students perceptions on the industrial training course and the benefit...

The Department of Civil & Structural Engineering at the Universiti Kebangsaan Malaysia (UKM) offers two Civil Engineering undergraduate programmes. This study is to evaluate the achievement of Programme Educational Objectives (PEOs) by indirect assessment consists of parents, alumni and employer surveys, while the Programme Outcomes (POs) is done b...

This paper is concerned with finite element analysis of corbels. Analyses were carried out on 254 × 405 × 254-mm reinforced concrete corbels. In this study 24 reinforced concrete corbels were considered. Variables considered in this investigation are: number, position, and different arrangement of secondary reinforcement. The results show that arra...

This paper investigates the dynamic response of a composite structural system known as Profiled Steel Sheet Dry Board with Concrete infill (PSSDBC) to evaluate its vibration ser-viceability under human walking load. For this point, thir-teen (13) PSSDBC panels in the category of Low Frequency Floor (LFF) were developed using Finite Element Method (...