带约束拉杆矩形钢管混凝土短柱延性计算

Ductility of Rectangular CFT Stub Columns with Binding Bars Subjected to Eccentric Loading

采用带约束拉杆矩形钢管混凝土的本构关系,建立了基于纤维模型法的模拟带约束拉杆矩形钢管混凝土短柱承载力-变形全过程曲线的非线性分析方法。计算结果与试验结果吻合良好。对带约束拉杆矩形钢管混凝土偏压短柱进行参数分析,回归了带约束拉杆矩形钢管混凝土短柱单向和双向偏压曲率延性系数的简化计算公式。公式的计算精度高,形式简单。

To adopt the constitutive relationship of rectangular CFT with binding bars,nonlinear analysis method of the whole process curve of capacity-deformation of rectangular CFT stub columns with binding bars subjected to eccentric loading is carried out based on fiber model method.The analysis results are in good agreement with the experimental ones.The parameters analysis of the curvature ductility of the CFT stub columns subjected to uniaxial and biaxial eccentric loading are performed by using verified programs,simplified formulas to calculate curvature ductility of rectangular CFT with binding bars are regressed,which have high accuracy and simple expression.