钢筋混凝土框架结构非线性分析中杆端出铰后对总荷载列阵的修正

Modifications of Overall Load Vector in the Nonlinear Analysis of RC Frames after the Formation of Beam Hinges

根据对钢筋混凝土框架结构非线性全过程分析中杆单元的杆端弯矩达到极限承载能力 Mu 后的单元受力情况和结点弯矩分配的分析 ,提出了在杆端弯矩达到 Mu 后 ,应对结点总荷载列阵及相应的杆端弯矩和单元刚度予以修正的思路。根据单元的几种不同受力情况 ,给出了修正的具体方法和程序框图。

By the analysis of the element loading situation and joint moment distribution of beam element after the moment of beam ends reaches its ultimate capacity M u, the necessity of modifying nodal overall load vector and the corresponding element stiffness matrix is pointed out. According to the different load cases, the specific modification methods and the block diagram are put forward.