钢结构非线性温度响应分析

基于非线性有限元法和全量理论,推导了常温和高温下钢框架结构温度响应的基本方程.推导中考虑了不同连接刚度、几何非线性和材料非线性及温度沿杆件截面高度线性分布等因素对结构温度响应的影响.用自行编制的计算程序进行了单层和双层钢框架结构非线性温度响应分析,计算结果与相关试验结果基本吻合,验证了文中理论与程序的正确性.通过所得计算结果与其他计算结果及试验结果的对比分析,发现连接刚度对梁的跨中挠度和柱顶水平位移的影响较大,对柱子的轴向位移影响不大.

Analyses of Nonlinear Temperature Response of Steel Structures

Based on the nonlinear finite element method and the total strain theory,the basic equations of the temperature responses at room and high temperatures are deduced,in which the effects of different parameters,such as the connection rigidity,the geometric nonlinearity,the material plasticity and the linear distribution of temperature along the section height,are all considered.A computer program is then developed and applied to the analysis of the nonlinear temperature responses of one-story and two-story steel frame structures.The calculated results accord well with the correlative experimental ones,thus verifying the correctness of the proposed theory and the program.Moreover,a comparison of the calculated results with other calculated and experimental results is performed.It is found that the connection rigidity has great effect on the middle span deflection of the beam and the horizontal displacement on the top of the column,but has little effect on the axial deformation of the column.