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钢管混凝土柱-钢梁平面框架的滞回关系
Hysteresis relationship in concrete filled steel tubular columns and steel beam planar frames
【摘要】 为研究钢管混凝土框架抗震性能,进行了钢管混凝土柱-钢梁平面框架往复加载时荷载-位移滞回关系的计算。考虑了材料和几何非线性,基于非线性纤维梁-柱单元理论,在OpenSees求解平台上,建立了数值计算模型。核心混凝土的应力-应变关系考虑了钢管约束效应;钢材的应力-应变关系采用双线性强化模型。结果表明:在钢材强度为235~420MPa、混凝土强度为30~90MPa范围内,理论计算结果和试验结果吻合较好。
【Abstract】 The hysteresis relationship in concrete-filled steel tubular(CFST) frames during seismic loads was analyzed for composite frames having CFST columns and H-shape steel beams.The model was based on fiber nonlinear beam-column element theory and the OpenSees Software,nonlinear material and geometric conditions to simulate the hysteresis to the reverse lateral loading versus the lateral displacement.The stress-strain relationship of the confined core concrete was considered,with a bilinear stress-strain model with strain hardening for the steel.The numerical results agree well with experimental results with steel yield strength of 235-420 MPa and concrete cube compression strength of 30-90 MPa.
【Key words】 concrete filled steel tubular(CFST) column; frame; material nonlinear; geometric nonlinear; hysteretic behavior;
- 【文献出处】 清华大学学报(自然科学版) ,Journal of Tsinghua University(Science and Technology) , 编辑部邮箱 ,2009年12期
- 【分类号】TU398.9
- 【被引频次】23
- 【下载频次】403