大跨度桁架转换结构弹塑性分析

Elastic-plastic analysis of the structure with a large-span truss transfer

转换结构是一种新型结构形式,现阶段框支转换结构框支剪力墙结构和剪力墙结构两种结构形式中应用较多。桁架转换结构在国内应用还比较少见,相关应用研究也较少,基于实际工程的桁架转换结构研究更不多见。桁架转换结构主要应用在跨度较大承担上部竖向构件传递荷载较大的结构中。利用有限元计算软件分析该结构不同抗震性能水准下桁架转换层的承载能力是否能够满足不同抗震性能水准要求。利用Push-over分析方法探究结构整体弹塑性,研究结构在推覆过程中的结构整体响应,得出结构位移以及塑性铰出现的过程。利用ABAQUS有限元分析软件对大跨度桁架转换层中的复杂节点进行弹塑性分析,建立两种不同节点形式的子模型,并研究其在地震作用下的应力变化以及在荷载逐步增大情况下各个构件的屈服过程。

The conversion structure is a new type of structure.At present,Frame branch transformation structure and the shear wall structure are more used.Truss structure is still relatively used in china,the relevant application research is also less,based on the actual engineering truss conversion structure research is rare.The truss structure is mainly used in structures where the span of the upper part is larger and the upper part of the vertical component is transported.Using the finite element analysis software to analyze if the bearing capacity of the truss transfer layer can meet the requirements of different seismic performance levels needs.The structural integrity elasto-plastic use Push-over Analysis Method was explored.The response of the structure was researched,and the structure displacement or appearance of plastic hinge under push-over.Analysis the complex node of the truss transfer stories by finite element analysis software ABAQUS.Two different forms of sub-node model are built.Research the stress changes of each member under earthquake action and the yield process of each component in the case of gradually increasing load.