K P Jaya

• PhD
• Professor (Full) at College of Engineering Guindy, Anna University

Reinforced concrete structures are largely employed in engineering practice in a variety of situations and applications. In most cases these structures are designed following simplified procedures based on experimental data. Although traditional empirical methods remain adequate for ordinary design of reinforced concrete members, the development of...

In severe intensity seismic zones, the conventional detailing of reinforcement in the exterior beam-to-column joint causes congestion of steel that affects the ease of construction. This article evaluates the behaviour of exterior beam-column joints with different anchorage/connection methods suitable for avoiding steel congestion. Sub-assemblages...

In severe intensity seismic zones, the conventional detailing of reinforcement in the exterior Beam-column joint causes congestion of steel that affects the ease of construction. In this paper, the performance of exterior beam-column joints with different anchorage/connection methods suitable for avoiding the congestion of steel is studied. The stu...

This study evaluates the cyclic response of the Precast Hollow Core Slab (PHCS) to the beam connection by proposing a novel connection detail. The evaluation involved, three different connection details, namely, (1) Continuity rebar and U-type Core Rebar Discrete with 100 mm ledge width (CUCRD_100); (2) continuity rebar and Core Rebar Combined with...

Generally dry connections are adopted in precast beam-column connections because it can easily be demounted. Precast beam-column dry connections use either corbel or steel components like billet, cleat angle, and stiffeners. Previous study on dry connections with corbel indicates that the load-carrying capacity is not same in both the positive and...

In seismically vulnerable areas, the beam to column joint is the most critical region in reinforced concrete structures. Because of the long development lengths and large bend diameters, the straight bar and hook anchorage arrangements in structural concrete create practical problems. Proper anchorage and joint details of reinforcement are essentia...

Beam-column joints are the critical zones of the RC moment-resisting frame. These joints govern the ductility and strength performance of the moment-resistance structural frame, and the addition of fibres can improve these properties. This article focuses on evaluating the behaviour of beam-column joints with steel fibre-reinforced concrete subject...

High-rise structures are more vulnerable when subjected to lateral loading. Generally, the shear walls function as the main lateral load resistant system in high-rise structures. In the case of high-rise structures with an open ground story, the shear wall-floor slab-deep beam acts together as a rigid jointed frame connection to withstand gravity a...

Industrialized building system (IBS) is the term used to represent the concept of prefabrication, and it has been widely used worldwide. In the last few decades, all the reinforced concrete structures in India were constructed adopting the cast-in-situ construction. Many problems were encountered during the cast-in-situ construction, such as incomp...

An experimental study focused on precast shear wall-slab joint failure is presented in this paper. For the precast specimen, the shear wall and slab are precast members and were connected with cast-in situ concrete using dowel bars. The specimen was tested under reverse cyclic loading and the structural behaviour of the connection was evaluated. Th...

The connection between concrete structural wall and floor slab constitutes a potential weak link in structures resisting lateral forces. The performance of the connection can influence the pattern and distribution of lateral forces among the vertical elements of the structure. For the economical design of a structure subjected to strong ground moti...

The structural behaviour of precast shear wall-diaphragm connection was compared with the monolithic connection under seismic loading. The monolithic connection was made by using U-bars connecting shear wall and slab, and the precast connection was made by using dowel bars in two steps. Firstly, U-shaped dowel bars from the precast shear wall lower...

The primary challenge in any precast structure is its connection between the various elements, mainly the shear wall–slab joint during earthquake. The objective of this study is to predict the shear capacity of the dowel connection under reverse cyclic loading by experimental testing. The study also aims to develop the 3D numerical model for dowel...

The primary objective of the present study is to understand the behaviour of innovative precast shear wall–slab connection subjected to reverse cyclic loading. The response of the precast connection is then compared with that of the similar monolithic connection. One-third scaled-down models were used for the investigation. In the monolithic connec...

An experimental investigation on the behaviour of two identical structural wall–flat slab subassemblies was conducted by testing scaled down joint models: one with conventional reinforcement detailing at the joint and the other with a proposed novel reinforcement detailing at the joint region under lateral seismic type loading. A theoretical analys...

An experimental investigation was conducted on two types of dry precast concrete connections subjected to reverse cyclic loading. Three one-third scale exterior beam-column assemblies representing a portion of a frame subjected to reverse cyclic loading were tested, including one monolithic specimen and two precast specimens. Displacement controlle...

This paper explains the investigation carried out to study the seismic behaviour of shear wall–flat slab connections with various reinforcement detailing at the joint region. The modelling and assessment of scaled down exterior wall–slab connection sub-assemblages subjected to static reverse cyclic loading is presented. Three-dimensional nonlinear...

The response of the exterior shear wall to flat slab connection, subjected to the in-plane reversible cyclic load, is analyzed in the paper. The numerical analysis of the exterior wall-slab connection specimens scaled down to one third of the original size, with two types of joint detailing patterns, was conducted. The conventional pattern and a pr...

The response of the exterior shear wall to flat slab connection, subjected to the inplane reversible cyclic load, is analyzed in the paper. The numerical analysis of the exterior wall-slab connection specimens scaled down to one third of the original size, with two types of joint detailing patterns, was conducted. The conventional pattern and a pro...

Infrared thermography is an interesting non-contact evaluation technique which relies on surface thermal gradient. It is used to identify dissimilarity in geometry or material property. The application of this method in civil engineering is limited, as concrete components are heavy and require large amount of heat to reveal differential thermal gra...

Ductile behaviour of shear wall is a prominent issue as the shear wall is a specially designed structural wall to resist earthquake forces. Ductility of shear wall is influenced by several factors like aspect ratio, axial load on shear wall, percentage of vertical reinforcement and percentage reinforcement in boundary element. A parametric study is...

This paper explains the investigation carried out to study the seismic behaviour of shearwall–flat slab connections with various reinforcement detailing at the joint region. The modelling and assessment of scaled down exterior wall–slab connection sub-assemblages subjected to static reverse cyclic loading is presented. Three-dimensional nonlinear f...

Structures designed according to performance-based seismic design (PBSD) are required to satisfy the target performance. PBSD requires extensive research for capacity evaluation and development of reliable nonlinear models. Shear walls are the ideal choice to resist lateral loads in multistoried RC buildings. They provide large strength and stiffne...

Non-destructive testing of concrete specimens has been an area of focussed research for many years. There has been an increased use of ultrasonic techniques for non-destructive testing in civil engineering as well as in other engineering disciplines. The present work focuses on identifying defects (like honeycomb and voids) and hollow pipe placed a...

This paper presents the study on High Strength Concrete (HSC) made of copper slag (CS) as replacement to natural sand. The results obtained ensure alternative use of copper slag for complete substitute of natural sand (fine aggregate). The strength characteristics were assessed at constant workability. Eleven different mixture proportions of copper...

The impact-echo method is a popular non-destructive testing method in civil engineering. The present work proposes the virtual edge extension technique to overcome the edge effect, which is a major issue during impact-echo testing. The virtual edge extension technique utilizes wave energy absorbing mediums (e.g., water) temporarily brought in conta...

The present study focuses on the performance of precast concrete beam-column dowel connections subjected to cyclic loading by conducting experiments. In this study, one-third scale model of two types of precast and a monolithic beam-column connection were cast and tested under reverse cyclic loading. The precast connections considered for this stud...

Experimental investigation on the effect of geometric parameters on the performance of exterior shear wall-floor slab joints subjected to cyclic loading is presented. A prototype building situated at Chennai, India was analyzed and estimated the force components in the exterior shear wall-slab joint. The force components and the dimensions were sca...

This paper presents the experimental investigation of one-third-scale precast concrete beam-column connections subjected to reverse cyclic loading. The precast specimen and monolithic specimen were designed for the same strength. For the first precast connection, the beam is connected to the column with corbel using a cleat angle with a single stif...

The floor slabs and shear walls together act as a rigid jointed frame in resisting gravity loads and lateral forces caused by wind and earthquake. The junction between the wall and slab is a key force-resisting element that is subjected to severe stress concentration. The performance of the connection can influence the pattern and distribution of l...

This paper explains the application of Proper Orthogonal Decomposition (POD), a statistical decomposition technique in the study of randomly fluctuating wind pressure fields acting on the surfaces of a gabled roof low rise building. POD represents a random process as a linear combination of deterministic functions, called the POD modes modulated by...

An analytical study has been made of the interaction between laterally loaded flanged shear wall and floor slabs in building with cross- shear wall. Particular attention has been paid to study the influence of Height of Shear Wall (H) and Effective width of the slab (We) on the performance of wall - slab joint in a multi-storey building with shear...

The paper pre. ents the study of performances of shear wall - slab connections with different detailing options when subjected to combined gravity and cyclic lateral loading. The connection between slab and shear wall is an essential link in the lateral load resisting mechanism of slab- wall systems. The performance of the connection can influence...

The present work focuses on comparing the performance of two types of precast beam-column connections with that of a monolithic beam-column joint under cyclic loading. In this study, experiments have been conducted on 1/3 scale models of two types of precast and a monolithic connection, designed for the same strength. The specimens have been subjec...

The main objective of the study is to investigate the effect of extending the slab reinforcement as cross inclined bars at the joint on the behaviour of exterior shear wall - floor slab joint. The connection between slab and shear wall is an essential link in the lateral load resisting mechanism of slab - wall systems. The performance of the connec...

The present work aims to study the seismic performance of exterior shear wall -slab joint with non-conventional reinforcement detailing.. Four joint sub assemblages were tested under reverse cyclic loading applied at the end of the slab. The specimens were sorted into two types based on the joint reinforcement detailing. Type 1 model comprises of t...

The floor slabs and shear walls together act as a rigid jointed frame in resisting gravity loads and lateral forces due to wind and earthquake. The junction between the wall and slab is a key force resisting element which is subjected to severe stress concentration. This paper presents the results of a parametric study of shear wall-floor slab conn...

Over the last few years, intensive research has been carried out on the behaviour of shear wall structures under various types of loading. However, there is paucity of information exists in the area of detailing of shear wall to floor slab connection. Hence an attempt has been made to understand the behaviour of the connection with respect to conve...

The present study aims to evaluate the static aerodynamic force coefficients required for the design of cable-stayed bridge against wind loads. A section of a bridge deck model consisting of three T-beams as deck cross section, having a geometric scale of 1:50 was selected for this purpose. Simulation of the flow around bridge deck was done using C...

Damage in reinforced concrete structures was mainly due to the inadequate detailing of reinforcement, the lack of transverse steel and the lack of proper confinement of concrete in structural elements. In case of high rise buildings subjected to seismic loading, the most vulnerable location is the shear wall-diaphragm connection region. The perform...

The frequent occurrence of the major earthquakes in the Indian subcontinent, and construction of tall buildings, especially over the last two decades demands for the construction of earthquake resistant buildings. Many of the tall buildings had collapsed in recent earthquakes and the reasons attributed were poor design and construction practices.Th...

Seismic retrofitting of constructions vulnerable to earthquakes is a current problem of great political and social relevance. Most of the Indian building stock is vulnerable to seismic action even.if located in areas that have long been considered of high seismic hazard. During the past thirty years moderate to severe earthquakes have occurred in I...

The present work aims to study the seismic performance of exterior beam column joint with non-conventional reinforcement detailing. Four joint sub assemblages were tested under reverse cyclic loading applied at beam end. The specimens were sorted into two groups based on the joint reinforcement detailing. The first group (Group A) comprises of two...

Static wind tunnel test was carried out on a section model of cable stayed bridge deck under simulated open terrain flow. Deck surface pressures at a cross-section were measured in the test for four different wind speeds corresponding to 0? wind inclination angle. Mean pressure distribution and the statistical values based on the pressure trace wer...

Earthquakes demonstrate vulnerability of various inadequate structures, every time they occur. Damage in reinforced concrete structures was mainly due to the inadequate detailing of reinforcement and the lack of transverse steel and confinement of concrete in structural elements. In the design and construction of seismic-resistant structur , one of...

Development of load cells for simultaneous measurement of drag, lift, and moment for section models of bridge decks under wind load has been reported. A typical rigid section of the bridge deck is mounted on the static test rig in the wind tunnel in a manner that measures the wind-induced static and dynamic components of aerodynamic coefficients, n...

Beam column joint which resists the reversal loads due to earthquake is a critical zone in a building. Owing to the crowding of reinforcement in this zone proper compaction is not possible. A new arrangement of reinforcement pattern for exterior joint which avoids congestion of steel and gives more room to freely compact the concrete is proposed. T...

The objective of the present study is to compare the behaviour of exterior beam-column joint sub-assemblages with transverse reinforcements detailed as per IS 456 and IS 13920. A six-storeyed RC building in the zone III is analyzed, and one of the exterior beam-column joints at an intermediate storey is designed. The earthquake analysis and design...

Beam column joint which resists the reversal loads due to earthquake is a critical zone in a building. Owing to the crowding of reinforcement in this zone proper compaction is not possible. A new arrangement of reinforcement pattern for exterior joint which avoids congestion of steel and gives more room to freely compact the concrete is proposed. T...

In the design and construction of seismic-resistant structures, one of the most critical areas is the shear wall -diaphragm connection. Dan1age in reinforced concrete structures is mainly attributed to shear force due to the inadequate detailing of reinforcement and the lack of transverse steel and confinement of concrete in structural elements. Co...

The failure of reinforced concrete structures in recent earthquakes caused concern about the performance of beam column joints. Confinement of joint is one of the ways to improve the performance of beam column joints during earthquakes. This paper describes an experimental study of exterior beam-column joints with two non-conventional reinforcement...

In multi-storey reinforced concrete buildings the seismic inertia forces generated at its floor levels are transferred through the various structural elements to the ground. The failure of a column can affect the stability of the whole building, but the failure of a beam causes localized effect. Lack of ductility in columns, beams, and connections...

Reinforced concrete structures are largely employed in engineering practice in a variety of situations and applications. In most cases these structures are designed following simplified procedures based on experimental data. Although traditional empirical methods remain adequate for ordinary design of reinforced concrete members, the development of...

This paper presents analytical investigation carried out to study the feasibility of implementing water tank as passive TMD using ANSYS. Two multi-storey concrete structures, three and five storey were taken for the study. The water tank was placed at the roof. The mass and frequency of the tank including its water, walls, roof, beams and columns w...

The frequent occurrence of the major earthquakes in the Indian subcontinent, and the construction of tall buildings, especially over the last two decades demands for the constntction of earthquake resistant buildings. Most of the studies shows that majority of the failures of the earthquake is due to the joint failure. Hence great care must be take...

The critical step in the substructure approach for the soil–structure interaction (SSI) problem is to determine the impedance functions (dynamic-stiffness coefficients) of the foundations. In the present study, a computational tool is developed to determine the impedance functions of foundation in layered soil medium. Cone frustums are used to mode...

An analytical method using a cone model is developed to evaluate the impedance functions of pile foundations in a layered soil medium. The dynamic behaviour of piles depends on the nature of the interaction between the piles and the surrounding soil. The soil-pile interaction effect modifies the stiffness of the piles and generates damping through...