Satish Kumar

Satish Kumar
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Satish verified their affiliation via an institutional email.
Verified
Satish verified their affiliation via an institutional email.
Indian Institute of Technology Madras | IIT Madras · Department of Civil Engineering

BE, MTech, DEng

About

59
Publications
12,378
Reads
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698
Citations
Introduction
Satish Kumar currently works at the Department of Civil Engineering, Indian Institute of Technology Madras. Satish does research in Structural Engineering. Their current project is 'Steel Design'.

Publications

Publications (59)
Conference Paper
Steel concrete composite construction is becoming popular nowadays. The behaviour of composite walls with flat, corrugated, or profiled steel plates on both sides connected with shear connectors has already been studied under combined constant axial compression load and cyclic lateral load. Using the traditional composite profiled deck slab as a wa...
Conference Paper
Full-text available
Steel-concrete composite constructions are gaining popularity, particularly in developing countries like India. This study presents a study on the ductility evaluation of concrete-encased steel-concrete composite columns. It is well known that plastic steel section exhibits high ductility and prevents local buckling. In contrast, the local buckling...
Conference Paper
The application and use of cold-formed steel (CFS) lattice portal frames as primary structural systems in constructing low-rise residential and medium-span industrial buildings have gained momentum due to their various structural and constructional advantages. In the present study, singly and doubly symmetric lattice T-Frames have been developed as...
Chapter
This paper analytically and numerically verifies the new design approach for cold-formed steel connections. The need of an easy and rapid construction of moment-resisting frames in cold-formed steel resulted in the screwed connections which are good in taking bearing and shearing forces. The closed cold-formed rectangular box sections are used as t...
Chapter
Steel trusses supporting reinforced concrete floors and acting in composite action with it are efficient and functional arrangements for floor systems in buildings. If the truss can be made with cold-formed steel members connected by self-drilling screws the system becomes even more efficient. However, providing suitable shear connection between th...
Chapter
The idea of this paper is to critically review the various finite element modelling methods of screw connections in cold-formed steel. To have a detailed study, the finite element modelling of gusset plates with screws as the fastener has been taken. In the real model, the screws are subjected to bearing, shear and pullout forces. The various metho...
Chapter
The process of soil response affecting structural deformations and vice-versa is termed as soil-structure interaction (SSI). Over last few decades, traditional belief of SSI being ever-beneficial to seismic response of structures has been challenged. There have been evidences of SSI induced damages in 1985 Mexico City, 1989 Loma Prieta, 1995 Kobe,...
Article
Full-text available
This paper presents an experimental investigation of Rectangular Concrete Filled Steel Tube (RCFST) sections subjected to cyclic lateral load combined with constant high axial compression. A total of eight RCFST columns with different combinations of width to thickness ratio, slenderness ratio and axial compression ratio were tested. The constant a...
Article
Full-text available
Steel concrete composite construction is now gaining popularity in our country. Concrete-encased steel columns have several advantages, but like RC columns, there is a need to ensure adequate concrete confinement so that it has sufficient ductility under seismic loads. This study investigates the confinement of the concrete based on the detailing o...
Article
Full-text available
New materials and structural systems are being introduced in construction profession every day either to replace conventional materials whose availability is becoming scarce or to improve the efficiency of construction. New systems are also being introduced to cater to new demands in functionality and aesthetics. While Indian researchers have kept...
Article
Vibration serviceability problems have often been encountered in steel-concrete composite floors due to their long span and lightweight nature and have low damping depending on the occupancy. These are being used for various applications and hence are being subjected to different dynamic loads such as those due to human excitations and mechanical v...
Article
Link to access article for free: https://authors.elsevier.com/a/1ep9j8MoIGwxDV (Till May 16, 2022) The conventional perception of soil-structure interaction being ever-beneficial to seismic response of structures has been challenged by evidences of damages inflicted on built infrastructure by a number of earthquakes. Numerical studies by many rese...
Article
Full text available at: https://rdcu.be/cd0Nz Structural deformations and soil displacements arising out of ground shaking are intertwined. This interplay is termed as seismic soil-structure interaction (SSI). Over last few decades, the conventionally perceived beneficial nature of SSI has been challenged with evidences of damaged sites from vario...
Article
A structure subjected to operational dynamic loads or moderate levels of ground shaking is expected to remain elastic. However under severe earthquakes, which are not very frequent, the same structure is designed to exhibit inelastic behaviour and sustain some damage so as to achieve an economical design. This dual strategy of seismic design makes...
Conference Paper
Full-text available
In today's modern technological era, thrust from the technology and power crisis followed by population outburst, lead to increased demand for construction and infrastructure facilities. In the power sector, to meet the demand of land acquisition and enhanced service life of the transmission line tower, FRP composite as a structural material has be...
Article
Steel-concrete composite frames with semi-rigid connections can be designed to resist earthquakes in low to moderate seismic zones by ensuring that they have adequate strength, stiffness and ductility. However, the design of semi-rigid composite frames to ensure desirable seismic performance is a complex problem due to several issues such as calcul...
Article
Full-text available
Design of steel structures is an iterative process that often turns complicated when requires initial guess. A good initial design guess that comes from past design experience can considerably reduce the number of subsequent analysis and design cycles. It is difficult to form declarative rules to express human intuitions and past experience. Anothe...
Conference Paper
Full-text available
This paper compares fiber reinforced plastic (FRP) composite with Steel in transmission line tower to analyze the life cycle performance of these two alternatives in terms of Life Cycle Costing (LCC) and Life Cycle Environmental Impact (LCA). The LCC analysis results for a typical transmission tower shows that the initial cost is higher than that o...
Conference Paper
Full-text available
India being a country having huge man power in industry and engineering work, truss bridge seems to be still affordable than cable stayed or suspension bridges unlike other developed nations. There are several existing and few upcoming double deck bridges across the country. Until now the analysis and design are done in conventional way. This resul...
Article
The process of soil response influencing motion of the structure and vice-versa is termed as soil-structure interaction (SSI). SSI has been traditionally considered to be beneficial to seismic response of a structure. It has been suggested that ignoring SSI in design practice leads to a conservative design. It is evident from the design codes which...
Conference Paper
Over 700 RC regular frames of two, four and eight storeys, designed and detailed as per the Indian seismic codal provisions are analyzed by varying the time periods, response reductions factor and percentage of longitudinal reinforcement. Non-linear time history analyses for six different earthquake accelerograms are carried out using the Pivot hys...
Conference Paper
Open ground storey (OGS) buildings are buildings on stilt floors which provide for vehicle parking space in the ground floor. Such buildings where the mass and stiffness is not uniform are called irregular buildings and are known to perform poorly under seismic loading. since most of the lateral deformation of the building is likely to be concentra...
Conference Paper
Performance based plastic design is considered to be an improvement over the traditional force-based design. However, practical implementation of the procedure requires information on the force-displacement characteristics of the frame which in turn depends on the moment-rotation relationship for the cross-section. The usual method is to adopt plas...
Conference Paper
An experimental study was undertaken to understand and predict the cyclic response of unstiffened and stiffened flange plate connections. Two full-scale interior joint sub-assemblage specimens were tested under reversed cyclic loading. In this paper, the details of test specimens, test setup and testing procedure are explained in brief. The importa...
Conference Paper
Steel built-up I-sections, composed of plates with high width-to-thickness ratios (slender sections) are commonly used in pre-engineered buildings under the premise that the design is governed by wind, especially in lower seismic zones. However, in the event of a severe earthquake, the sections are susceptible to local buckling and may exhibit a no...
Conference Paper
A parametric study was carried out on a total of 54 pinned-base PEB frames of varying spans and heights. The elastic seismic demand under MCE was estimated and compared with the design lateral capacity of PEB frames. From the results, it is concluded that even for higher seismic zones, low ductility sections (1.5 to 2) are adequate to survive MCE....
Conference Paper
Full-text available
The behaviour of cold formed steel members is different from that of hot-rolled members due to local buckling. The available literatures and current codes do not provide adequate data to predict the flexural behavior of CFS box sections. Numerous finite element studies were carried out to characterize the M-Ɵ response of CFS box beams which underwe...
Conference Paper
The present study analyses effects of soil-structure interaction (SSI) on the elastic response of moment resisting framed reinforced concrete structures founded on embedded raft in an elastic half-space to accelerograms compatible to design spectra conforming to diverse geology. Most structures are designed to remain elastic under design basis eart...
Conference Paper
Full-text available
Though most of the structures are designed to behave inelastic under severe earthquakes, need of a proper understanding of elastic behaviour under moderate earthquakes cannot be ignored. In addition, machine foundations subjected to harmonic excitations are supposed to remain elastic during its usual occupancy. This article reports effects of engin...
Article
In general practice, composite beams are designed with either simple connections or fully rigid moment connections due to lack of information on semi-rigid connections. But, semi-rigid composite connections will offer several advantages like strength, stiffness and economy to the system when compared to simple or moment connection. Although several...
Article
Full-text available
Self-drilling screws (SDS) are generally used to connect secondary structural elements such as purlin, roofing sheets, wall and side claddings etc, in which the screw head is in contact with thin sheets. Attempts have been made to use these fasteners to connect primary structural members made up of cold-formed steel (CFS) sections, where it is expe...
Conference Paper
Full-text available
Over last few decades, the traditionally prevailing view of the always-beneficial role of soil-structure interaction (SSI), in seismic response of structures, has been challenged. It has been established that ignoring SSI can be an oversimplification which may lead to an unsafe design in certain cases. There has also been a simultaneous development...
Article
Structural design and construction involves several stages and needs both talent and co-operation of the concerned persons. Lack of expertise and mistakes in design or execution can result in failure of the structure. In developing countries, the lack of regulations related to the required qualifications and expertise of the people involved, couple...
Article
Steel-concrete composite frames offer several advantages such as efficient sections in terms of strength and stiffness, economy and speed of construction. Semi-rigid connections can also be easily achieved by providing additional rebars in the slab to resist hogging moments at beam ends. However, design of these frames is a complex problem as the m...
Article
Composite connections are defined as the regions where composite beam frames into a steel column. A composite flange plate connection with web cleats is studied here since it is expected to satisfy the seismic performance requirements at a reasonable cost. A modification of the traditional flange plate connection, termed as stiffened flange plate c...
Article
Composite connections are defined as regions where composite beam frames into a steel column. A composite flange plate connection with web cleats is studied here since it is expected to give adequate seismic performance at minimum cost. A modification of the traditional flange plate connection, termed as stiffened flange plate connection is also su...
Article
To prevent disaster in future earthquakes, one way of retrofitting the members in reinforced concrete buildings is concrete jacketing. The present study investigates the effect of jacketing on the flexural strength and performance of beams. First, slant shear tests are conducted to study the interface between old and new concrete. Second, beam spec...
Article
Steel-concrete composite construction puts to best use the complementary structural properties of steel and reinforced concrete. However, adequate research has not been carried out on the seismic behaviour of composite beam to column connections and so they are often designed as pure steel connections neglecting the presence of the concrete slab. I...
Article
Fracture behaviour of piping components used in pressurised heavy water reactors of nuclear power plants are of great importance to ensure safety and integrity against the extreme load conditions. Fracture mechanics approach predicts crack growth behaviour under normal operating conditions and failure load under accidental conditions. Leak-Before-B...
Article
Piping elbows are one of the critical components of the cooling piping systems in power plants. This paper presents the details of fatigue crack propagation analysis based on code procedure and FEM and compares the results with experimental observations. The fatigue crack propagation was evaluated based on the inelastic range J integral, Js, which...
Article
The concept of leak before break (LBB) has now replaced the traditional design basis of a double ended guillotine break (DEGB) to design the piping systems for new generation of nuclear reactors. The LBB aims at the application of fracture mechanics principle to demonstrate that pipes are, in general, unlikely to experience DEGB without prior indic...
Article
The energy dissipation capacity of conventional concentric braced frames in multi-storeyed buildings degrades drastically under earthquake loading, due to buckling of bracings under the compression regime. Non-Buckling bracing is an innovative patented system, in which the buckling of the bracing is prevented and the energy is dissipated by plastic...
Article
Rectangular Hollow Sections (RHS) have superior structural performance compared to conventional steel sections. However, the application of RHS in structural steel framework is limited because suitable connection configurations have not been developed between such members. Also adequate information on the moment–rotation characteristics of connecti...
Article
Connections between Rectangular Hollow Sections (RHS) have been a long-standing problem in steel construction but have received little attention from researchers. To ameliorate the situation, a new and efficient connection was proposed and evaluated by cyclic tests and finite element analysis. The connection consists of a channel connector welded t...
Article
Reinforced concrete frames are designed to withstand severe earthquakes by developing flexural plastic hinges in beams, away from the beam-to-column joint. To preclude shear and bond failures, additional shear reinforcement and anchorage lengths are advocated leading to congestion in the joint region. To clarify the effect of joint detailing on the...
Chapter
Thin-walled circular steel tubes used as cantilever bridge piers suffer damage in the form of local buckling during severe earthquakes. In the present study, a combined experimental and analytical approach is used to clarify their cyclic behaviour. Monotonic, cyclic and pseudodynamic tests performed on thin-walled circular tubes modeling bridge pie...
Article
In order to ensure the safety of steel bridge piers against earthquakes, their inelastic response up to collapse needs to be predicted accurately. An evolutionary-degrading (E-D) hysteretic model was found to fulfill this need with very little computational effort. The model is based on a comprehensive damage index, which takes into account the eff...
Article
Full-text available
The pseudodynamic test is increasingly being used for testing structures under seismic loads. Due to the limited capacity of available equipment and also to economic reasons, testing is often required to be carried out on scaled models rather than full-scale structures. Although the similitude laws are well established, the selection of a suitable...
Article
An evolutionary-degrading hysteretic model is presented which can be used to simulate the seismic response of thin-walled steel structures. The degradation of strength and stiffness is related to the concept of the damage index. The damage index used, was developed to account for the various damaging effects observed in experiments, including the e...
Article
Bridge piers with hollow box sections are widely used in Japan in highway bridges. Unlike the columns in buildings, these piers are designed with high width-thickness ratios of component plates. This makes them susceptible to damage during a severe seismic event. To evaluate the damage sustained, a damage model is developed based on cyclic loading...
Article
The seismic response of steel box columns modeling bridge piers is studied using the pseudodynamic testing method. The concept of the pseudodynamic test is reviewed. Scaled models of steel bridge piers of box section were tested under a constant axial load and using site-specific spectrum-compatible accelerograms. The columns sustained damage in th...
Article
Full-text available
To clarify the effect of joint detailing on the seismic performance of lightly reinforced concrete frames, an experimental study was undertaken. The parameters studied were the effect of joint rotation, column axial load, cross-reinforcement in the joint, the percentage of longitudinal reinforcement in the beam and the loading history. It was found...
Article
Full-text available
This paper describes Reinforced Hollow Inter-Locking (HIL) Block Masonry which offers several advantages like cheaper and faster construction, efficient interlocking in different directions to withstand shear and bearing forces, self alignment to ensure accurate and simple construction practice and to construct both load bearing and non-load bearin...

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