基于“伪弹塑性”分析的双重抗震防线设计方法*
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（华东建筑设计研究院有限公司， 上海 200011）
［摘要］对理想的框架-核心筒结构双重抗震防线破坏模式进行剖析，提出“适度设防、合理破坏”的双重抗震防线控制目标，明确目标内涵的要点。提出一种“伪弹塑性”分析方法的思路和操作步骤，通过该方法可以得到框架-核心筒结构满足双重抗震防线性能的外框柱承载能力需求。基于此，提出 “一种新的二道防线设计方法”，该方法无需控制外框柱按照刚度分配的地震剪力比例，而是直接采用一种精确的截面和配筋设计方法即可实现二道防线的性能要求。最后通过一个案例初步验证了新方法的有效性。［关键词］框架-核心筒结构; 双重抗震防线; “伪弹塑性”分析; 性能设计中图分类号：TU313.3 文献标识码：A 文章编号：1002-848X(2015)23-0046-07
Design method for the dual seismic fortification lines based on “pseudo-elasto-plastic” analysisAn Dongya（East China Architectural Design & Research Institute Co., Ltd., Shanghai 200011, China）Abstract: The ideal failure mode of frame-core wall structural system with dual seismic fortification lines was dissected and its control objective of ″moderate fortification, reasonable destruction″ was proposed and key points of the objectives were clarified. The idea and steps of proposed ″pseudo-elasto-plastic″analysis method were put forward, and by using this method, the carrying capacity requirements of the external columns can be obtained and can meet the dual seismic fortification lines performance requirements. On this basis, a new design method for the dual seismic fortification lines was proposed. In this method, seismic shear force ratio of external columns distributed according to the stiffness does not need to be controlled, however, the performance requirements of the dual fortification lines can be achieved directly using an accurate cross-section and rebar design method. Finally, the effectiveness of the new method was initially verified through a case.Keywords: frame-core wall structure; double seismic fortification lines; “pseudoelasto-plastic” analysis; performance-based seismic design
*华东建筑设计研究院有限公司建设科技项目资助(14-1类-0025-结)。作者简介：安东亚，博士，高级工程师，Email：dongya_an@xd-ad.com.cn。
