Abstract

Info

Title:: Seismic Performance Experiment of Frame Strengthened by Composite Walls with Different Grid Forms

Author(s):: GUO Meng; WANG Shuang-jiao; YUAN Quan; XU Zhong-qing; China Academy of Building Research

Keywords:: frame structure; composite wall of autoclaved aerated concrete block; grid form; seismic performance

Abstract:: In order to study the influence of grid forms on the seismic performance of frame strengthened by composite walls of autoclaved aerated concrete blocks, 1∶2 scale models of the strengthened specimens with 2-rib beams 3-rib columns and 2-rib beams 5-rib columns were tested under low-frequency cyclic loading. The failure process and characteristics of specimens were analyzed, and the seismic performance difference between the two specimens, such as bearing capacity, stiffness and energy dissipation, were compared. The results show that both the grid forms and the layout of the blocks play important roles in seismic performance of the frame strengthened by composite wall. Though the number of 5-rib columns specimen is more, but the layout of blocks is unreasonable, so the improvement of bearing capacity is relatively small and the stiffness in the forepart is lower than that of the 3-rib columns specimen with reasonable layout of blocks. The seismic performance can be improved by adding the number of rib columns and it will be working better combining with reasonable layout of blocks.