基于某钢框架高层建筑的多遇地震分析

Analysis of Frequent Earthquake Based on a Steel Frame High-rise Building

框架结构被广泛地应用于钢结构建筑,但因为侧移刚度小,地震作用下易产生较大侧向位移。通过在结构体系内的部分框架柱之间布置一定数量的支撑形成钢框架支撑体系,可显著提高结构侧向刚度并降低用钢量。本文首先总结了国内外钢结构、钢框架结构以及钢框架支撑结构体系的研究现状,分别阐述优点和缺点,然后总结本文在研究分析时所借用和参考的抗震设计理论和计算方法,结合分析软件佳构STRAT V7.0给出抗震设防指标,最后以钢结构框架—支撑体系的工程实例为研究对象,运用反应谱法和时程分析法对该体系处于多遇地震(小震)作用时的层间转角位移、剪重比等相关参数指标进行了计算分析,检验了该钢框架高层结构的抗震性能,为钢框架高层建筑的抗震研究提供参考。

Frame structure is widely used in steel structure buildings,but it is easy to produce large lateral displacement under earthquake because of its small lateral stiffness.By arranging a certain number of supports between some frame columns in the structural system to form a steel frame support system,the lateral stiffness of the structure can be significantly improved and the amount of steel can be reduced.Firstly,this paper summarizes the research status of steel structure,steel frame structure and steel frame supporting structure system at home and abroad,expounds the advantages and disadvantages respectively,then summarizes the seismic design theory and calculation method borrowed and referred to in the research and analysis,and gives the seismic fortification index combined with the analysis software strat v7.0,Finally,taking the engineering example of steel frame support system as the research object,the relevant parameters such as inter story angular displacement and shear weight ratio of the system under frequent earthquakes(small earthquakes)are calculated and analyzed by using response spectrum method and time history analysis method,and the seismic performance of the steel frame high-rise structure is tested,which provides a reference for the seismic research of steel frame high-rise buildings.