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    楊必峰
    (上海建筑設(shè)計(jì)研究院，上海200041)

[摘要] 大底盤是多塔樓結(jié)構(gòu)重要的抗震單元和薄弱部位，設(shè)計(jì)應(yīng)選擇合理的計(jì)算模型進(jìn)行分析，并確保中、大震下大底盤的安全性。介紹了大底盤梁、板在中、大震下的設(shè)計(jì)目標(biāo)和設(shè)計(jì)過程。以工程實(shí)例對(duì)大底盤梁、板進(jìn)行定量分析，指出設(shè)計(jì)中應(yīng)引起重視的問題。
[關(guān)鍵詞] 多塔樓結(jié)構(gòu)；大底盤；平面內(nèi)應(yīng)力；抗震設(shè)計(jì)方法

    Discussion on seismic design for large chassis of multi-tower structure
    Yang Bifeng
    ( Shanghai Institute of Architectural Design & Research,  Shanghai 200041, China)

Abstract: The enlarged base of multi-tower structure was an important aseismic element and was the weakness in earthquake, which should be analyzed with rational structural model and should not be broken by the medium or maximum earthquake action. The aseismic design methods of the beam and the slab in the enlarged base of multi-tower structure were introduced. The problems which should be noticed in the structure design were pointed out by a practical detail analysis.
Keywords: multi-tower structure; enlarged base; in-plane stresses; aseismic design methods