钢筋混凝土框架结构的力学性能研究  

Research of mechanical behaviors for reinforced concrete frames

作　　者：焦俊婷[1] 叶英华[1] 

机构地区：[1]北京航空航天大学土木工程系

出　　处：《四川建筑科学研究》2006年第5期34-37,共4页Sichuan Building Science

基　　金：国家自然科学基金(50448015);嘉应学院重点研究课题(05KJZ06)

摘　　要：基于非线性梁柱单元模型,对柱顶作用垂直集中荷载和水平荷载的钢筋混凝土强柱弱梁门式框架进行了数值分析,研究了梁、柱的变形情况,框架的一阶、二阶非线性效应,柱顶垂直集中荷载对框架承载力、侧移的影响。得出:框架柱的侧移比梁挠度大很多,框架变形以柱侧移为主;垂直集中荷载对框架的水平极限承载力、侧移有明显影响;当有垂直集中荷载作用时,二阶非线性与一阶非线性分析结果比较,二者差异明显,表明几何非线性影响明显。Based on the nonlinear element model of members, the portal frame of reinforced concrete with strong columns and weak beam under vertically and horizontally concentrated loads on column tops is computed. The deformation of the beam and column, the first and second order nonlinear effects, and the effect of the vertically concentrated load on the ultimate horizontal bearing capacity and lateral displacement are researched. The following conclusions can be drawn： Tile lateral displacement of columns is much more than the beam＇s deflection, and the frame mainly generates lateral displacement. The vertically concentrated load has visible effects on ultimate horizontal bearing capacity and lateral displacement. When the vertically concentrated load acts, the theoretical results of the second order nonlinearity are compared with that of the first order nonlinearity, they are different. This shows that the geometrical nonlinear effect is apparent.

关 键 词：钢筋混凝土 框架 力学性能 非线性梁柱单元模型 截面高斯积分法 

分 类 号：TU375[建筑科学—结构工程]