双向偏压钢筋混凝土异形构件截面分析的简化方法

为便于双向偏压作用下异形钢筋混凝土构件截面分析,本文提出了新的简便可行的截面积分方法。该方法将截面混凝土划分成若干三角块,用高斯积分法求每个三角块的刚度,之后所有三角块刚度求和得到截面混凝土的刚度。用该方法对异形(L、T、十形)截面进行了极限承载力分析,分析结果与试验数据吻合很好。还分析了荷载角、轴压比、配筋率和混凝土强度等因素对双向偏压作用下的L形截面承载力的影响。

Simple method for analyzing reinforced concrete members with irregular cross-sections under biaxial eccentric compression

A new and simplified numerical integration method is suggested in this paper to easily analyze reinforced concrete members with irregular cross sections under biaxial eccentric compression. In the method, concrete section is divided into several triangle units and each unit stiffness is calculated with Gauss integration, the stiffness of all triangle units are then summed to form the stiffness of the section. With this method, some irregular cross sections are analyzed. The analysis results of ultimate capacity are in good agreement with experimental data. The effects, such as load angle, axial compression ratio, reinforcement ratio and concrete strength, on the bending capacity are also analyzed for the L shaped sections subjected to biaxial eccentric compression.