考虑双向耦合作用的钢筋混凝土柱弹塑性简化分析方法  

A simplified plastoelastic analysis of reinforced concrete columns subjected to biaxial bending

作　　者：邱法维[1] 刘中田[1] 孙宪春[1] 张玉峰[1] 杜文博[1] 李文峰[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《建筑结构学报》2004年第5期85-91,共7页Journal of Building Structures

基　　金：国家自然科学基金资助项目(50178041)

摘　　要：根据已有的钢筋混凝土柱双向拟静力实验研究的结果,给出了一种考虑双向弯曲耦合作用和轴力变化的弹塑性分析方法,该方法根据弹性状态下的曲率分布,近似计算钢筋混凝土柱发生塑性变形后的曲率,从而省去了弹塑性分析过程逐步积分试算杆端曲率的过程。本文通过计算结果与实验结果的比较,证实了该方法既能大量节省计算机的存储空间、提高计算速度,同时又能够保证计算结果的有效性和准确性,若将此方法用于结构的整体计算中,将大大提高计算精度和计算效率。Based on the previous quasi-static test researches of reinforced co ncrete columns under biaxial loading, a simplified plastoelastic analysis method in consideration of the coupling effect of biaxial bending and variation of axi al force is presented. This method employs the elastic curvature distribution to approximately calculate the plastic curvature, so it successfully avoids the it erative procedure and improves the calcula tional efficiency. At last, the accur acy of the method has been verified by comparisons between experimental and calc ulational results of 7 RC column specimens. If the method is applied to structur al integral calculation, the calculational accuracy and efficiency will be large ly improved.

关 键 词：钢筋混凝土柱 弹塑性分析 拟静力 双向弯曲 轴力 简化分析 计算结果 方法 实验结果 过程 

分 类 号：TU375.3[建筑科学—结构工程]