Y型偏心支撑钢框架耗能段长度的研究

Research on Length of Link Beam of Y-eccentrically Braced Steel Frames

对不同耗能梁段长度的Y型偏心支撑钢框架的滞回性能进行了非线性有限元分析。结果表明,随着耗能梁段长度的增加,Y型偏心支撑钢框架的强度、刚度、延性和耗能性能均产生了不同程度的退化现象;耗能梁段愈短,其塑性变形愈大,由此而导致耗能梁段过早塑性破坏的可能性也就愈大,而耗能梁段过长则抗震性能较差。最后,根据有限元模拟结果对耗能梁段的长度提出了设计建议。

The paper presents the nonlinear finite element analysis for the Y-eccentrically braced steel frames on the different length of link beam. Analysis indicates that the strength, rigidity, ductility and energy-dissipation performance of Y-eccentrically braced steel frames deteriorate differently with the length increase of the link beam. The shorter the link beam is, the larger the plastic deformation of it will be, which will lead to the result that the link beam Finally, this paper is likely to be plastically collapsed earlier and a longer link beam has a poor cyclic behavior. suggests the design of the length of link beam based on finite element simulation results.