建筑结构学报2017，Vol.38Issue(11)：23-33,11.DOI:10.14006/j.jzjgxb.2017.11.003
复合受扭型钢混凝土柱抗震性能试验研究
Experimental study on seismic behavior of steel reinforced concrete column under combined torsion
摘要
Abstract
In order to study the seismic behavior of steel reinforced concrete columns subjected to combined torsion,the quasi-static tests of eleven steel reinforced concrete members and one reinforced concrete member for comparison under combined torsion were carried out.The influence of steel form,axial compression ratio,torsion-bending ratio,concrete strength,reinforcement ratio and stirrup ratio on the seismic behavior of members were studied.The results show that the entire process of load-bearing in steel reinforced concrete members under combined torsion can be divided into:non-cracking stage,cracking stage and failure stage.The failure modes of members have two types:failure with torsional feature and failure with flexural and torsional feature.The hysteresis loop is larger for members with axial compression ratio of 0.1 than 0.2,with torsion-bending ratio of 0.5 than 0.1,and with stirrup spacing of 75 mm than 100 mm.The average value of ductility factors for eleven steel reinforced concrete members is 5.12.Thereinto,the average values are 4.17 and 6.27 for six H-shaped members and five cross-shaped members respectively.And the average value is 3.86 for one reinforced concrete contrast member.With the increase of the displacement,the attenuation of the bearing capacity for members grows bigger and bigger.The entire degradation process of relative stiffness consists of three stages:elastic degradation stage,yield degradation stage and failure degradation stage.The equivalent damping ratio increases with the increasing of torsional curvature and a rough linear relationship is found between these two parameters.关键词
型钢混凝土柱/复合受扭/拟静力试验/抗震性能Key words
steel reinforced concrete column/combined torsion/quasi-static test/seismic behavior分类
建筑与水利引用本文复制引用
翁晓红,邵永健,劳裕华,夏敏..复合受扭型钢混凝土柱抗震性能试验研究[J].建筑结构学报,2017,38(11):23-33,11.基金项目
国家自然科学基金项目(51078249,51478287) （51078249,51478287）
