无单元伽辽金法在钢框架节点耐火极限中的应用

基金项目:

国家自然科学基金项目（41902277）；陕西省自然科学基金项目（2019JQ-689）

ANALYSIS OF FIRE RESISTANCE LIMIT OF JOINTS OF STEEL FRAMES BASED ON ELEMENT-FREE GALERKIN METHOD

摘要: 基于正交基函数的无单元伽辽金法，利用MATLAB编制了求解瞬态温度场和弹塑性应力场耦合的热弹塑性离散方程程序，并将其应用到钢框架中柱的受火试验非线性分析中，对钢框架受火过程的测温点的温度变化和转角随温度的变化趋势进行了研究。通过对解析结果与数值分析结果及现场实测数据的分析比较，验证了该方法的适用性和优越性，为高温下钢框架的研究提供了一种新方法。
- 无单元伽辽金法 /
- 热弹塑性 /
- 钢框架 /
- 耐火极限
Abstract: By using the theory of element-free Galerkin method based on orthogonal basis function, a program for solving the coupled thermo-elastic-plastic discrete equation of transient temperature field and elastic-plastic stress field was compiled by MATLAB, and it was applied to the nonlinear analysis of fire test of columns in steel frame.The temperature change process at the temperature measurement points and the changing trend of rotation angle with temperature were analyzed. By comparing the analytical results with the numerical analysis results and the field measured data, the applicability and superiority of this method were verified, which could provide a new reference for the research of steel frames at high temperatures.
- element-free Galerkin method /
- thermo-elasto-plastic /
- steel frame /
- fire resistance limit

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