摘要
框架结构中梁构件的的转动约束刚度是其在高温下的变形和受力计算中一个必不可少的参数。本文首先研究了框架梁转动约束刚度的影响因素,并利用子框架法和刚度串并联法则推导出了无侧移框架的梁构件转动约束刚度的近似算法。为了考虑框架侧移对梁构件转动约束刚度的影响,本文利用理论方法计算了有侧移柱与无侧移柱转动刚度的差值,并结合该理论解对近似算法进行了修正。最后,通过比较近似解与精确解,验证了该近似算法的正确性和适用性。
The restraint stiffness of frame beams is a crucial parameter in calculating their stress and deformation under high temperature.This paper firstly investigated the factors that influence this parameter.By using the sub-frame method and the principle of the combination of stiffness,an approximate method was deduced to calculate the restraint stiffness of the beams from the frame with no lateral displacement.In order to take into account the influence of the lateral movement of the frame,the difference between the rotational stiffness of sway column and non-sway column was obtained using the theoretical method,and accordingly an improvement of the above approximate method was made.Finally,by comparing the approximate solution with the accurate solution,the correctness and the applicability of this method was verified.
出处
《建筑钢结构进展》
2010年第6期54-60,共7页
Progress in Steel Building Structures
基金
国家重点科学基金项目(507380057)
关键词
转动刚度
转动约束刚度
侧移
子框架
rotational stiffness
rotational restraint stiffness
lateral displacement
sub-frame
