钢筋混凝土结构非线性分析及其程序设计

采用有限元法对钢筋混凝土平面杆系结构在使用荷载下进行了非线性分析,针对现有数值方法存在的不足,以梁或柱划分的若干区段为最小单元,将变刚度杆转变为若干等刚度杆,从而将钢筋混凝土非线性问题转换成一系列等刚度杆的线性问题,同时采用简化的B-N-M关系,大大简化了该问题的计算,并使用Fortran 90语言编制了该问题的计算程序,模拟了钢筋混凝土结构开裂前后的受力特性.

Nonlinear analysis of RC structures and program design

The authors analyze some problems of reinforced concrete structures under service load by finite element method,which breaks the traditional method of element division and convert the stiffness-variable element into stiffness-invariable element,so that a nonlinear problem of RC structure is converted into linear problems of a series of stiffness-invariable elements by setting a part of the beams and columns the basic element making the problem simpler by employing the easier B-N-M relationship.A nonlinear finite element program is completed by Fortran 90,which simulates the performance of RC structures after and before cracks appeare in the concrete.