压弯剪扭作用下钢筋混凝土任意截面非线性分析  

NONLINEAR ANALYSIS OF ARBITRARY CROSS-SECTION OF REINFORCED CONCRETE BEAM SUBJECTED TO COMBINED AXIAL,BENDING,SHEAR AND TORSION LOADING

作　　者：曹燕[1] 张宇鹏[2] 叶英华[3] 刁波[3] 

机构地区：[1]国家知识产权局专利局专利审查协作北京中心 [2]北京市建筑工程研究院有限责任公司,北京100039 [3]北京航空航天大学

出　　处：《建筑技术开发》2013年第3期6-10,24,共6页Building Technology Development

摘　　要：在参考国内外文献的基础上,概述了用于钢筋混凝土压弯剪扭复合作用下进行非线性分析的理论模型,并利用基于修正压力场理论的混凝土本构关系推导出混凝土截面切线刚度矩阵。此模型基于铁木辛柯梁理论,按截面的应力状态,将单元的控制截面划分为1D、2D和3D三种区域。并将等参元理论和高斯积分计算方法引入混凝土截面切线刚度的计算中,从而建立了压弯剪扭作用下钢筋混凝土任意形状截面刚度的通用计算模型。Based on the reference of papers both domestic and abroad, this article presents a general explanation of a model for the nonlinear analysis of reinforced concrete with arbitrary geometry cross-section under combined loading conditions including axial force,biaxial bending,torsion and biaxial shear force. The cross-section tangent-stiffness formulation is established using constitutive material model of Modified Compression Field Theory. The proposed model is based on the Timoshenko beam theory. According to stress condition of the sections, they are subdivided into regions with 1D,2Dand 3D. Applying the isoparametric element theory and Gauss integral the model of numerical analysis methods of arbitrary reinforced concrete cross-sections under combined loading conditions is uniformed.

关 键 词：钢筋混凝土 压弯剪扭 任意截面 等参积分 非线性分析 

分 类 号：TU375[建筑科学—结构工程]