钢筋混凝土箱梁的约束扭转分析

为了对钢筋混凝土箱梁约束扭转进行分析,根据广义坐标法原理,通过给定其广义坐标,推出了钢筋混凝土箱梁约束扭转分析的微分方程组,给出了简化求解方法。后按照常微分方程求解器COLSYS的要求编制了有关主程序。通过计算实例,得到了箱梁的翘曲位移、截面的扭转角等重要分析参数,给出了钢筋混凝土箱梁的正应变和剪应变计算公式。可以方便地绘制出约束扭转下截面剪应力的分布图形。该研究为钢筋混凝土箱梁的约束扭转分析和实际应用找到了一个简便方法。

Analysis of restrained torsion for reinforced concrete beams with box sections

A restrained torsion analysis of reinforced concrete (RC) beams with box sections was developed based on the system of differential equations for the restrained torsion of the beam using the generalized coordinate method. The system of differential equations is solved using the ordinary differential equation solver in the COLSYS software. The results are used to analyse important factors such as the warp displacement, the section torsion angle, the section strain and shear strain, and the section shear stress. A simple method is then presented for the analysis of the restrained torsion in reinforced concrete (RC) beams with box section.