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（中國航空規(guī)劃設計研究總院有限公司， 北京 100120）
［摘要］以成都博物館工程為背景，針對空間外鋼網(wǎng)格-鋼框架-鋼筋混凝土核心筒混合結構性能化設計的關鍵問題進行分析并對該結構進行振動臺試驗和設計方法研究。開展結構的概念設計，針對結構特性制定抗震性能目標和穩(wěn)定性能指標；通過彈性、彈塑性時程分析進行結構地震響應研究，并通過振動臺試驗驗證時程分析的結果；對空間外鋼網(wǎng)格進行整體穩(wěn)定性及關鍵構件失效后結構的防倒塌能力分析。時程分析和振動臺試驗結果表明:工程采用外鋼網(wǎng)格銜接內(nèi)部鋼框架及內(nèi)部鋼筋混凝土核心筒的結構形式是可行的。時程分析得出，結構5～15m標高存在薄弱部位，但在罕遇地震下結構能夠滿足預期抗震性能目標，結構塑性首先出現(xiàn)在核心筒連梁，并大量開展；而鋼結構塑性開展較少；空間鋼結構穩(wěn)定性良好，并且具有較高的冗余度，能夠保證少數(shù)關鍵構件破壞下結構不倒塌。
［關鍵詞］性能化設計； 概念設計； 抗震性能； 穩(wěn)定性能； 防倒塌能力
中圖分類號：TU973+.31文獻標識碼：A文章編號：1002-848X(2018)11-0010-07
Performance-based design and study on hybrid structure combined with outer steel grid and inner high-rise building
Ge Jiaqi, Song Maomao, Ma Botao, Wang Mingzhu, Guan Zhizhong, Zhang Ling, Liu Jing
(China Aviation Planning and Design Institute (Group) Co., Ltd., Beijing 100120, China)
Abstract:With Chengdu Museum project as the background, the key problems involved in the performance-based structural design of the hybrid structure including outer steel grids, steel frame and inner reinforced concrete corewall were analyzed, the study of design methods and the shaking table test of the structure were conducted. The seismic concept design was conducted. Performance-based seismic design goals and stability performance indicators were defined based on the structural characteristics. The research on structural seismic response was made through elastic analysis and elastic-plastic time-history analysis and and the results of the time-history analysis were verified by the shaking table test. The overall stability of the outer steel grid and the anti-collapse capability of the structure after failure of key components were analyzed. Time-history analysis and shaking table test results show that it is feasible to use external steel grids to connect the internal steel frame and the internal reinforced concrete corewall. Time-history analysis shows that there are weak parts between the 5～15m elevations of the structure, but the structure can meet the expected seismic performance target under rare earthquakes. The structural plasticity first appears in the corewall coupling beams and is carried out in large quantities; while the plasticity in steel structure is less developed; the spatial steel structure has good stability and high redundancy, which can ensure that the structure would not collapse when a few key components are destroyed.
Keywords:performance-based design; seismic concept design; seismic performance; stability performance; anti-collapse capability
*北京市科技新星計劃資助項目（Z171100001117087），文物保護行業(yè)標準研究制定計劃項目資助（WW2008-009-T）。
作者簡介：葛家琪，本科，研究員級高級工程師，Email:capdi.gssd@vip.163.com。
