兰州新区保障住宅装配式钢结构的抗震性能分析

Analysis on Seismic Performance of Assembled Steel Structure Indemnificatory Housing at Lanzhou New Area

为了研究兰州新区保障住宅装配式钢结构的抗震性能,采用pushover方法对兰州新区装配式钢结构保障性住宅1#楼进行了罕遇地震作用下结构的弹塑性分析。分析中考虑了倒三角分布荷载和均匀分布荷载两种加载模式,从结构的基底剪力-顶点位移曲线、层间位移角和出铰机制等方面对该结构的抗震性能进行评估。结果表明:(1)两种加载方式下结构性能点处的位移均小于《抗规》规定的罕遇地震下的弹塑性位移限值;(2)两种加载方式性能点处的框架各层层间位移角均满足要求;(3)从出铰机制反应出结构的'强柱弱梁'的性能。

In order to study the seismic performance of assembled steel structure indemnificatory housing at Lanzhou New Area,the pushovermethod was used to analyze the elastoplastic behavior of the building 1#subject to rare earthquake.Two loadingmethods,inverted triangle load distribution pattern and uniform load distribution pattern,were applied.The seismic performance of the building was evaluated in terms of the base shear-vertex displacement curve,inter-story displacements angle and the yieldingmechanism.The results indicate that(1)The building performance point displacements under the two loading patterns are less than the elastic-plastic displacement limit under rare earthquakes specified in the Seismic Design of Building Code;(2)the inter-story displacement angles at different performance points under the two loading patternsmeet the code requirements;(3)the'Strong Column-Weak Beam'structure performance is reflected from the hingemechanism.