建筑结构学报2017，Vol.38Issue(8)：55-64,10.DOI:10.14006/j.jzjgxb.2017.08.006
复杂空间桁架节点抗震性能试验研究及有限元分析
Experimental study and finite element analysis on seismic performance of complex spatial truss joints
摘要
Abstract
The truss transfer floor is widely used in high-rise buildings with the advantage of achieving vertical transformation of structural forms.The mechanical behavior of the joint at the junction of the trusses has a significant impact on the safety of the whole truss transfer floor.To investigate the seismic performance of two complex spatial joints in the transfer floor in the Raffles eastern podium located in Changning District of Shanghai,1/4-scale joint model tests and finite element analyses were carried out.This paper reports the test method and test results,including the strain distribution,the strain development,the capacity of the joints,and the failure mode.The test results and finite element analysis results indicate that these two joints have high load bearing capacity,good seismic performance and meet the design requirements.Local enlargement at the ends of web members improves force transfer from webs to chords,and decreases the stress concentration there.The weak area of the joints is located at the junction of the steel reinforced concrete column and the chord flanges.When the joints are broken,almost no chord and web members are in the yield state.关键词
空间桁架节点/转换层/拟静力试验/有限元分析/抗震性能Key words
spatial truss joint/transfer floor/quasi-static test/FEA/seismic performance分类
建筑与水利引用本文复制引用
张石钰,杨毅萌,王飞,王承佑,周颖..复杂空间桁架节点抗震性能试验研究及有限元分析[J].建筑结构学报,2017,38(8):55-64,10.基金项目
国家自然科学基金项目(51678449). （51678449）
