Article ID: 201905
Title: A novel study on damage mitigation of partial infill walls in RC frame Buildings
Authors: Binod Kumar Shrestha* and Anil C. Wijeyewickrema **
*Graduate Student, Department of Civil and Environmental Engineering, Tokyo Institute of Technology, Tokyo, Japan, shrestha.b.ac@m.titech.ac.jp
**Associate Professor, Department of Civil and Environmental Engineering, Tokyo Institute of Technology, Tokyo, Japan, wijeyewickrema.a.aa@m.titech.ac.jp
Abstract:
Lightly reinforced concrete (RC) infill walls with openings (spandrels, wall piers, and wing walls) that were monolithically constructed inside RC frames were damaged in the past major earthquakes. The damage of these walls can be mitigated by installing seismic slits between the wall segments and the primary frames. However, in this study, partially infilled post-tensioned hybrid (PH) precast concrete shear walls are introduced inside the RC frame buildings to reduce damage and show better seismic performance. For this purpose, seismic performance of four-story partially infilled PH precast concrete wall (PHW) frame buildings and conventional RC wall (RCW) frame buildings with different frame shear ratios (0, 0.25, and 0.5) subjected to spectrum-matched far-fault earthquake ground motions are investigated. In addition, incremental dynamic analysis (IDA) is conducted, and the adjusted collapse margin ratios (ACMRs) values of each building are computed and compared with the acceptable ACMRs values provided in the FEMA P695. Results indicated the superior seismic performance and greater collapse safety of partially infilled PHW frame buildings compared to RCW frame buildings.
Profile of the presenting author:
Er. Binod Kumar Shrestha had received his degree in Civil Engineering from Pulchowk Campus, Tribhuvan University, Nepal, in 2016. He was a former civil engineer at National Society of Earthquake Technology (NSET-Nepal) under ‘Building Code Implementation Program in Nepal’ (BCIPN). He completed his Master’s degree in 2018 and currently pursuing his doctoral degree in Tokyo Institute of Technology. His major research interests are structural dynamics and earthquake engineering, post-tensioned hybrid (PH) precast concrete walls, finite element analysis of structures, reinforced concrete structures, and single degree of freedom systems.
