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Research Area

In-plane testing of infilled RC frames with viscoelastic link elements

Research Scholar - Nidhin S. Pachappoyil

Supervisor - Prof. Pankaj Agarwal

In this study, slotted concrete blocks with visco-elastic links are used as infill panel in RC frame construction. The energy dissipation is provided in the form of effective damping in the structure through the low yield strength visco-elastic link element as well as friction. These blocks are cast in concrete and links are prepared by pieces of used rubber tyres (co-polymer of Styrene-butadiene rubber) sandwitched between thin steel plates. These links not only hold each concrete blocks in place and provide initial stiffness to the structure, but also dissipate the energy through yielding and small slips under extreme earthquake loading conditions.

In-plane testing of infilled RC frames with viscoelastic link elements

Research Scholar - K. V. Naveen Kumar

Supervisor - Prof. Pankaj Agarwal

The research study is focused on retrofitting severely damaged RC frames. The critically damaged RC frames accessible subsequent to the study on flexible infills were reconstructed using conventional and global retrofitting techniques. The ruptured or buckled rebars of the columns were linked using in-house made rebar coupling sleeves which were later interlinked using flat rectangular steel bars. Fibre Reinforced Polymer strengthening is carried out in a specific frame. The Global capacity of the frames are enhanced using two distinctive techniques such as the concentrically placed hollow steel brace and a Combined Metallic Damper made up of flexure and shear steel plates.

In-plane cyclic load test on full scale 2-storey H-wall constructed with EPS Core Sandwich Panel

Research Scholar - Adil Ahmad

Supervisor - Prof. Yogendra Singh

In this study, strength and seismic safety of Expanded Polystyrene (EPS) core sandwich panel wall is determined under in-plane cyclic load test. The wall panels were constructed by concrete wythes with welded wire mesh joined by shear connectors and EPS core. The micro concrete was sprayed on EPS panel on both sides of required thickness. This structural system is environment friendly and have various advantages over conventional construction methods, such as speedy construction, cost effective, energy efficient, light weight, avoiding shuttering and heavy machinery, thermal, sound and moisture resistant. Ideal for mass housing projects.