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为了分析不同支撑形式对钢框架结构体系振动特性的影响,利用PKPM软件设计了X型、V型和人字型3种不同支撑形式的12层钢框架支撑结构,提供了主要构件的尺寸和结构的振动特性,再利用有限元软件ANSYS和SAP2000对3种不同支撑的自振特性分别进行了分析,探明了不同支撑形式对该结构体系的动力特性的影响;利用ANSYS软件进行了El-Centro波和上海人工二波输入下的多遇和罕遇地震的弹塑性时程分析,探讨了不同支撑形式的结构地震响应。分析结果表明,V型和人字型对结构刚度的提高比X型的支撑明显,前二种支撑效果非常接近,分析结果可供工程设计人员在结构选型时参考。
In order to analyze the influence of different support forms on the vibration characteristics of steel frame structure system, PKPM software was used to design three-layer 12-story steel frame support structure of X-type, V-shape and herringbone type, which provided the size and structure of the main components Then the finite element software ANSYS and SAP2000 were respectively used to analyze the vibration characteristics of the three supports. The influence of different support forms on the dynamic characteristics of the system was proved. The ANSYS software was used to perform the El-Centro Elastic-plastic time-history analysis of frequently encountered and rare earthquakes under artificial and artificial wave inputs in Shanghai, and the seismic response of structures under different support forms are discussed. The analysis results show that V-type and herringbone-type structure stiffness increase significantly more than the X-type support, the first two kinds of support effect is very close, the results of the analysis for engineering design personnel in the selection of the structure reference.