基于数值子结构方法的低延性RC框架结构抗震性能精细化分析

发布时间：2019-06-17 21:03

【摘要】：该文以钢筋混凝土低延性框架结构为分析对象,总结该类结构及相关构件数值分析研究现状;基于桁架模型研究柱及节点组合体等关键构件的精细模型化思路与方法,并分别采用试验予以验证;以此为基础,借助在Open Sees软件中开发的数值子结构方法及平台,以汶川地震中严重受损的多层钢筋混凝土框架结构为对象建立精细化数值子结构模型,通过局部构件的精细分析研究其在强震作用下的抗震性能及失效模式。经该文研究表明采用桁架模型建立易于发生脆性破坏的柱及节点组合体等关键构件的精细化模型合理且准确;选择数值稳定且更适用的精细化模型与数值子结构平台分析涉及不同类型且易发生脆性破坏的低延性结构更具优势;针对低延性框架,不宜采用位移角限值作为结构性能评估的唯一判断依据,在分析中需考虑未达到目标位移前结构可能发生的脆性破坏模式。
[Abstract]:In this paper, the reinforced concrete low-ductile frame structure is taken as the analysis object, and the research status of numerical analysis of this kind of structure and related components is summarized, and the fine modeling ideas and methods of key components such as columns and joint combinations are studied based on truss model, and verified by experiments. On this basis, with the help of the numerical substructure method and platform developed in Open Sees software, the fine numerical substructure model of multi-story reinforced concrete frame structure seriously damaged in Wenchuan earthquake is established, and its seismic performance and failure mode under strong earthquake are studied by fine analysis of local components. The results of this paper show that it is reasonable and accurate to establish the fine model of the key components such as columns and joints which are prone to brittle failure by using truss model, and it is more advantageous to select the numerical stable and more suitable refinement model and the numerical substructure platform analysis, which involve different types of low ductile structures which are prone to brittle failure. For low ductile frames, the displacement angle limit should not be used as the only judgment basis for structural performance evaluation, and the brittle failure mode of the structure before the target displacement should be considered in the analysis.
【作者单位】：大连理工大学建设工程学部;厦门大学建筑与土木学院;哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51261120376,91315301-12)
【分类号】：TU352.11;TU375.4

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