地震工程学报2017，Vol.39Issue(6)：1134-1141,8.DOI:10.3969/j.issn.1000-0844.2017.06.1134
基于OpenSees的巨型SRC柱低周反复试验数值分析
Numerical Analysis of Low Cyclic Loading Tests of Mega SRC Columns Based on OpenSees
摘要
Abstract
A steel reinforced concrete (SRC)column is a combined specimen constructed by allo-cating steel in the reinforced concrete in order to bear the external force.Because the SRC column gains the advantages of high strength and stiffness,good ductility,and fine refractoriness,it is widely used in high-rise structures nowadays.From the mixture of steel and reinforced concrete,the force performance and failure mode of the SRC column become more complex than ordinary columns.In this paper,in order to study the numerical simulation methods of the seismic per-formance of mega SRC columns,based on the finite element software OpenSees,tests on five mega SRC column specimens with different and complex steel sections were carried out under low cyclic reversed load by using the fiber element.Then,the numerical simulation results were com-pared to hysteretic and skeleton curves.The results indicate that the finite element model based on the fiber element can efficiently simulate the hysteresis response of mega SRC columns,which veri-fies the rationality and reliability of the numerical model.Meanwhile,a new high-performance multi-lay-er shell element was used in order to accurately analyze one of the mega SRC column specimens.By com-parison to experimental results,the multi-layer shell can adequately simulate the initial stiffness and peak bearing capacity of the specimen.By comparison to the simulation results of the fiber element model,it was found that using fiber element could better simulate the descent of the specimen's bearing capacity, and the results were rather more accurate and efficient.关键词
巨型SRC柱/纤维单元/OpenSees/低周反复荷载/分层壳单元Key words
mega SRC columns/fiber element/OpenSees/low cyclic reversed loading/multi-lay-er shell element分类
建筑与水利引用本文复制引用
张蓝方,种迅,刘谦敏,蒋庆,叶献国..基于OpenSees的巨型SRC柱低周反复试验数值分析[J].地震工程学报,2017,39(6):1134-1141,8.基金项目
国家自然科学基金资助项目(51278519,51408179) （51278519,51408179）
华南理工大学亚热带建筑科学国家重点实验室开放研究项目(2015ZA04) （2015ZA04）
北京市自然科学基金(8142024) （8142024）
