节点刚度对多层钢框架静力性能的影响分析

由于缺乏计算理论和方法,大多数半刚性节点按刚性节点进行设计,与实际情况相差很大.介绍了实际工程中多层钢框架结构经常采用的半刚性连接形式;采用有限元分析的方法,将半刚性连接节点视为弹簧单元;通过通用有限元软件Ansys建立有限元模型进行计算分析,研究了节点刚度对多层钢框架结构变形和内力的影响.计算结果表明,采用了半刚性连接的钢框架结构,相对于理想刚接的情况,结构的内力和变形都有很大变化.在钢框架分析和设计中,应考虑半刚性节点的影响.

The Effect of Joint Stiffness on Static Capability of Multistory Steel Frames

For the absence of calculation theory and design method,many semirigid connections are calculated and designed as rigid connections in construction,which leads to the significant difference between the calculation result and the real stressed state.This paper presents the normal types of the semirigid connections used in multistory steel frames.Taking the semirigid end-plate joint as a spring element,FEM models are set up by Ansys to calculate and analyze.The deformations and internal forces of the steel frames with semirigid connections are discussed,and the influence of semirigid connections on the multistory steel frames design is studied in this paper.The result shows that the steel frames with semirigid connections are different from those with rigid connections.The flexibility of the connections affects the behavior of the frames,and their influences can not be ignored in the steel frames design and analysis.