关海涛，  周建龙
    (现代设计集团华东建筑设计研究院有限公司，上海200002)

[摘要] 钢屋盖与混凝土支承体系组成的整体结构为非经典阻尼体系。对于此类结构，如直接采用比例阻尼假定将给系统动力反应分析引入误差。本文在总结非经典阻尼体系阻尼计算方法的基础上，对此类组合结构的实用阻尼计算方法进行了研究。以某大跨空间索拱钢屋盖一混凝土支承体系为例，建立了此类复杂组合结构的等效综合阻尼比计算方法，并对其相关影响因素进行了研究。为此类组合结构的阻尼计算提供了较精确的实用方法。
[关键词] 钢屋盖；支承体系；非经典阻尼；等效综合阻尼比

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