蒙皮支撑的钢构件非线性静力分析

本文提出了蒙皮支撑的钢构件在静力荷载作用下的几何非线性分析方法，钢构件，蒙皮和连接件分别被离散成空间薄壁梁柱单元，正交各向异性壳单元和连接单元。

Nonlinear Static Analysis of Diaphragm-bracedSteel Members

The Method for geometric nonlinear analysis of diaphragm braced steel members under static loads is presented in this paper. The steelmembers, diaphragm and the connectors are subdivided and simulated asspace thin - walled beam- column elements, equivalent orthotropic shellelements and connection elements, separately. An updated Lagrangianformulation is adopted to establish the structural nonlinear equilibriumequation. Variable cylindrical arc length method has been used, togetherwith the modified Newton - Raphson method as the iteration strategy, totrace the equilibrium paths. After the program has been verified, several testmodels are analysed. The results indicate that the method presented in thispaper can analyse diaphragm-- braced steel members under static loads andthe computation results and the test data are in agreement.