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（華南理工大學(xué)建筑設(shè)計(jì)研究院，廣州 510641）

［摘要］探討了把首層架空框架結(jié)構(gòu)簡化為單質(zhì)點(diǎn)模型的條件，對(duì)工程中常見的首層架空多層鋼筋混凝土框架結(jié)構(gòu)的簡化條件進(jìn)行了分析，指出當(dāng)結(jié)構(gòu)高寬比較小時(shí)，可簡化成一個(gè)單層框架模型。根據(jù)單層框架模型，利用結(jié)構(gòu)延性需求、等效阻尼比、地震加速度反應(yīng)譜得到架空層的層間需求曲線（V-u曲線），作為架空層抗地震倒塌設(shè)計(jì)的依據(jù)。通過結(jié)構(gòu)在罕遇地震下的倒塌率計(jì)算，驗(yàn)證了文中方法的可靠性。

［關(guān)鍵詞］框架結(jié)構(gòu)；填充墻；架空層；抗地震倒塌

中圖分類號(hào)：TU375.4文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2011)04-0105-04

Simplified method of anti-seismic collapse of RC multi-story frame structures with first floor open

Cheng Zhihui, Chen Huiming(Architectural Design Research Institute of SCUT, Guangzhou 510641, China)

Abstract:The equivalent conditions of frame structure with first floor open and infilled walls model simplified to single particle model were discussed. With the consideration of infilled walls, in common scale in engineering, simplified conditions of multi-story and multi-span reinforced concrete frame with open floor were collected and generalized. For checking collapse resistant, the frame can be simplified to the single floor frame model when the height-width ratio of the structure is small. The inter-story demand curve of open floor（V-u curve）, as the design basis of open floor collapse resistant, was obtained through the structure ductility demand, the equivalent damping ratio and the earthquake acceleration response spectrum. The reliability of the method was checked by calculating the collapse rate of the structure under rare earthquake.

Keywords: frame structures; infilled walls; open floor; anti-seismic collapse

作者簡介：程志輝，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，注冊(cè)監(jiān)理工程師，Email:dezhchen@scut.edu.cn。

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