SEISMIC DESIGN OF THE MASONRY INFILL RC FRAME BUILDINGS WITH FIRST SOFT STOREY
Supervisor: Koichi KUSUNOKI
The main aim of this study was to investigate the seismic performance and design of the masonry infill Reinforced Concrete (R/C) frame buildings with the soft first storey under a strong ground motion. The study also highlighted the error involved in modeling of the infill RC frame building as completely bare frame neglecting stiffness and strength of the masonry infill wall in the upper floors. The envelope curve for representing non-linear behaviors of masonry infill wall was determined for numerical analysis. The attempt was made to determine the strength increasing factor (h) to account the effect of the soft storey through various 2D analytical models using Capacity Spectrum Method (CSM) and established its relationship with initial stiffness ratio (Ko2/Ko1). In this study, the non-linear dynamic time history analysis was also carried out with a three dimensional practical model in order to verify the proposed strength increasing factor (h).
|Citation: ||Bulletin of IISEE, 43, 85-90.|