基于“偽彈塑性”分析的雙重抗震防線設計方法*
安東亞
- 摘 要
-
（華東建筑設計研究院有限公司， 上海 200011）
［摘要］對理想的框架-核心筒結構雙重抗震防線破壞模式進行剖析，提出“適度設防、合理破壞”的雙重抗震防線控制目標，明確目標內涵的要點。提出一種“偽彈塑性”分析方法的思路和操作步驟，通過該方法可以得到框架-核心筒結構滿足雙重抗震防線性能的外框柱承載能力需求?；诖耍岢?“一種新的二道防線設計方法”，該方法無需控制外框柱按照剛度分配的地震剪力比例，而是直接采用一種精確的截面和配筋設計方法即可實現二道防線的性能要求。最后通過一個案例初步驗證了新方法的有效性。［關鍵詞］框架-核心筒結構; 雙重抗震防線; “偽彈塑性”分析; 性能設計中圖分類號：TU313.3 文獻標識碼：A 文章編號：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
*華東建筑設計研究院有限公司建設科技項目資助(14-1類-0025-結)。作者簡介：安東亞，博士，高級工程師，Email：dongya_an@xd-ad.com.cn。
