考虑粘结滑移效应的型钢混凝土梁柱单元  

Bond-slip considered beam-column elements for concrete encased steel column

作　　者：郑山锁[1] 张传超[1] 李磊[1] 

机构地区：[1]西安建筑科技大学,西安710055

出　　处：《计算力学学报》2011年第6期909-914,共6页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金重大研究计划培育项目(90815005);国家自然科学基金(50978281;51108376)资助项目

摘　　要：本文建立了一种适用于型钢混凝土梁柱构件的非线性梁柱单元,并在建模中考虑了粘结滑移效应。根据型钢混凝土自由体的受力特点,建立了考虑界面粘结滑移时单元的控制微分方程和变形协调方程。基于有限单元柔度法和纤维模型的基本思想,选取了合适的力的插值函数。根据最小势能原理,推导了单元的柔度矩阵,提出了基于柔度法的单元状态确定方法。最后,通过数值计算结果与试验结果的对比,对本文建立的模型适用性和准确性进行了验证。结果表明,计算结果与试验结果吻合较好,计算精度高,且计算速度快。This paper presents a new steel reinforced concrete （SRC） finite element that explicitly accounts for the slip between the steel andthe surrounding concrete. According to the force characteristics of steel reinforced concrete （SRC） free body, the equations of equilibrium and compatibility are established. Based on the analytical model of force-based beam-column elements and fiber-section, the appropriate force interpolation function is determined. According to the principle of minimum potential ener- gy, the flexibility matrix and the analytical for element state determinations are proposed. Finally, comparison with the experimental test on steel reinforced concrete （SRC）columns shows that the prediction with the new model is in good agreement with the test, and the model is of high accuracy and calculation speed.

关 键 词：梁柱单元 粘结滑移 柔度法 纤维模型 非线性 

分 类 号：TU398.2[建筑科学—结构工程] O241[理学—计算数学]