Executive Summary : | Proper seismic design of buildings is crucial for structural safety, efficiency, and minimal disturbance during earthquakes. Post-tensioned (PT) shear walls are often used to resist large lateral shear forces, but their maximum energy dissipation is limited to energy dissipation through local damage. In situations with higher force and limited drift demand, PT shear walls with internal energy dissipating reinforcements (IEDR) are used. However, IEDR is designed to undergo non-linear deformation during seismic shaking, making it difficult to replace after an earthquake. To overcome this limitation, externally fitted EDR (EEDR) is proposed as an alternative solution. EEDR has strong merit over its predecessor in terms of similar energy dissipation added and easy replacement after an earthquake, making the structure fit quickly to withstand future earthquakes. The research group at IIT Bhubaneswar is one of the pioneering groups in India conducting research on PT hybrid shear walls with external EDR using numerical studies and experimental testing. Various external energy dissipator configurations have been proposed, and their efficiency in dissipating energy induced due to lateral load generated by seismic activity has been investigated.
The proposed research aims to further understanding in this field by developing a numerical and experimental model of PT shear walls integrated into the building frame, their fragility and vulnerability analysis, and the feasibility of various post-tensioning cable configurations. |