Abhishek Verma

Indian Institute of Technology Guwahati | IIT Guwahati

Revision of design standards, new regulations, and planned/unplanned increases in loadings potentially make buildings vulnerable to changes in capacity demands. This may result in some structural components of an existing structure requiring strength or stiffness improvement. Strengthening of capacity deficit members is widely recognised as the pre...

Reinforced concrete (RC) is the most widely used construction material in the building industry. Over the past few decades, traditional RC construction has transitioned towards precast construction to improve onsite productivity. However, industrial buildings typically demand large spans resulting in precast beams with very high deadweight, causing...

Cold-formed steel (CFS) battened columns with adequately spaced chords have structurally outperformed the conventional CFS built-up columns with closely spaced chords, but have witnessed limited research previously. The relative slenderness of the unsupported chord (between the battens) to the built-up column, is a critical parameter that governs t...

The global performance of framed structural systems is controlled by the behaviour of column elements, which need to develop sufficient strength and stiffness under different loading conditions. Built-up columns are used in a typical low-rise cold-formed steel (CFS) framing system when the axial load demands are high, and a single channel section d...

Columns are the principal structural members of the superstructure directly connected to the foundations. Both their capacity and stiffness response need to be adequate for satisfactory performance. Generally, in cold-formed steel (CFS) framing systems, two channels are fastened in the back-to-back arrangement to form a built-up column (I-type) and...

A test program on cold-formed steel (CFS) laced columns fabricated using plain channels has been presented in this study. Twelve specimens with single and N-type lacing configurations were fabricated. The lacing plates and the end-plates were connected to the chords by using self-drilling screws. The effect of critical parameters, like lacing slend...

Steel plate shear walls (SPSWs) consisting of unstiffened thin steel plates attached to the horizontal and vertical boundary steel elements are often used as the lateral force-resisting systems in buildings. The presence of composite floor slabs may not only alter the force demands on the boundary elements but also influence the failure mode of SPS...

Ultra-high performance concrete (UHPC) contains substantial amount of quartz powder (QP) which is expensive and carcinogenic. Partial replacement of QP with excavation wastes such as marine clays can help curtail its environmental impact. However, clays can degrade the hydration quality and increase the shrinkage in low w/c systems. A possible way...

Concrete damage plasticity (CDP) model is widely used to represent the constitutive behaviour of confined concrete in finite element analysis of concrete-filled tube (CFT) columns. This model requires a constant dilation angle and a stress-strain base curve of concrete as the main input parameters. However, in the case of rectangular CFT columns, t...

Steel plate shear wall (SPSW) is used as a lateral force-resisting system capable of dissipating the input seismic energy through metallic hysteresis. High axial force demand on the vertical boundary elements (VBEs) results in relatively heavier sections at the lower story levels of SPSWs. This lead to a non-uniform interstory drift distribution ov...

Steel plate shear walls (SPSWs) are used as lateral load resisting systems in building structures, which consist of thin steel plates surrounded by boundary elements. It is most often provided in the same bay along the entire height of the buildings. This results in high demands on columns and foundation. Instead of providing the plates in a single...

Steel Plate Shear Walls (SPSWs) have proven to be efficient lateral force-resisting systems. SPSWs utilize the post-yielding strength of the unstiffened web plates, which makes the system economically viable. ANSI/AISC 341-10 suggests the value of response modification factor for SPSWs to be 7, which is based on judgment and qualitative comparisons...

Unstiffened steel plate shear walls (SPSWs) are used as lateral load-resisting systems in building structures. The energy dissipation mechanism of SPSWs consists of the tension yielding of web plates and the formation of plastic hinges at the ends of horizontal boundary elements. However, vertical boundary elements (VBEs) of high-rise SPSWs may exp...

Unstiffened Steel Plate Shear Walls (SPSWs) are used as the lateral load-resisting systems in building structures. The energy dissipation mechanism of SPSWs is consisted of the tension yielding of web plates and the formation of plastic hinges at the ends of horizontal boundary elements (HBEs). High-rise buildings experience the high overturning mo...

Steel plate shear walls (SPSWs) are used as lateral load resisting systems in building structures, which consist of thin steel plates surrounded by boundary elements. It is most often provided in the same bay along the entire height of the buildings. This results in high demands on columns and foundation. Instead of providing the plates in a single...

Steel plate shear walls (SPSWs) are used as lateral force-resisting systems in new and retrofitted structures in high-seismic regions. Various international codes recommend the design of SPSWs assuming the entire lateral load to be resisted by the infill plates. Such a design procedure results in significant overstrength leading to uneconomical and...