往复荷载下钢筋混凝土柱受力性能的数值模拟  

NUMERICAL SIMULATION FOR THE HYSTERESIS BEHAVIOR OF RC COLUMNS UNDER CYCLIC LOADS

作　　者：汪训流[1] 陆新征[1] 叶列平[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《工程力学》2007年第12期76-81,共6页Engineering Mechanics

基　　金：高等学校博士学科点专项科研基金资助课题(20040003095)

摘　　要：准确预测地震荷载下钢筋混凝土柱的受力性能,对评估震后混凝土框架结构及桥梁结构的安全性和震害损失具有重要意义。由于复杂的材料性能和受力行为,地震作用下钢筋混凝土柱受力性能的准确计算目前仍需主要借助数值模拟,并且对数值模型中混凝土和钢筋材料的滞回本构关系提出了更高的精度要求。该文基于纤维分析模型,采用更加完善的反复荷载下钢筋和混凝土的本构,编制了可精确分析钢筋混凝土杆系结构及构件在往复荷载下受力性能的计算程序,并对不同轴压比和不同配筋率的2根压弯柱试件进行了数值模拟,计算结果与试验结果吻合良好。Precise prediction for the hysteresis behavior of reinforced concrete （RC） columns under seismic loads is important to assess the safety of RC frames and bridges during sever earthquake. Due to the complicated material behavior and complex external force during the earthquake, an accurate simulation of the behaviors under seismic loads currently mainly depends on numerical method, and more precisions are demanded for the hysteresis constitutive laws of concrete and steel reinforcement. In this paper, a fiber model program is developed with more precise hysteresis constitutive laws of concrete and steel reinforcement. Two columns, which are under cyclic compressive-bending loads, with different axial load ratios and reinforcement ratios, are analyzed and the simulation results are found agreed well with test results.

关 键 词：纤维模型 往复荷载 混凝土柱 滞回关系 数值分析 

分 类 号：TU375[建筑科学—结构工程]