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關(guān)海濤， 周建龍
(現(xiàn)代設(shè)計集團華東建筑設(shè)計研究院有限公司，上海200002)[摘要] 鋼屋蓋與混凝土支承體系組成的整體結(jié)構(gòu)為非經(jīng)典阻尼體系。對于此類結(jié)構(gòu)，如直接采用比例阻尼假定將給系統(tǒng)動力反應(yīng)分析引入誤差。本文在總結(jié)非經(jīng)典阻尼體系阻尼計算方法的基礎(chǔ)上，對此類組合結(jié)構(gòu)的實用阻尼計算方法進行了研究。以某大跨空間索拱鋼屋蓋一混凝土支承體系為例，建立了此類復(fù)雜組合結(jié)構(gòu)的等效綜合阻尼比計算方法，并對其相關(guān)影響因素進行了研究。為此類組合結(jié)構(gòu)的阻尼計算提供了較精確的實用方法。
[關(guān)鍵詞] 鋼屋蓋；支承體系；非經(jīng)典阻尼；等效綜合阻尼比Research on Computational Method for the Damping of Steel Roof on Concrete Bearing Structural System
Guan Haitao, Zhou Jianlong
( East China Architectural Design & Research Institute Co., Ltd., Xian Dai Architectural Design Group, Shanghai 200002, China)Abstract: The proportional damping hypothesis which may result in remarkable errors for non-classical damping systems should not be simply utilized in the dynamic analysis of the steel roof on concrete bearing structural system. In this paper, computational method for the damping of such composite structures is studied on the basis of the summarization of various computational methods for the damping of non-classical damping systems. By utilizing the method presented in this paper, the general equivalent damping ratio of a long-span cable arch space structure was analyzed. Result shows that the computational method proposed in this paper is a practical method with relatively high precision for the damping of steel roof on concrete bearing structural systems.
Keywords: steel roof; bearing structural system; non-classical daruping; general equivalent daruping ratio
