（1 深圳市力鹏建筑结构设计事务所, 深圳 518034；2深圳华侨城房地产有限公司, 深圳 518053）

［摘要］工程上对钢与混凝土组合结构的阻尼比取值尚缺乏根据。对应变能阻尼比的计算方法进行了论述，通过实例计算，比较了组合结构采用单一阻尼比和采用应变能阻尼比时的内力和位移。计算结果表明，组合结构的各阶振型的应变能阻尼比与振型中不同材料构件参与振动的程度有关。对组合结构取单一阻尼比进行抗震计算会使钢构件的内力偏小或混凝土构件的内力偏大，建议采用应变能阻尼比法进行抗震计算。

［关键词］组合结构; 应变能阻尼比法; 阻尼矩阵; 阻尼比; 计算方法

中图分类号：TU398        文献标识码：A        文章编号：1002-848X(2014)06-0023-04

Strain-energy damping ratio method of composite structures for seismic design

Sun Renfan1, Wei Lian1, Liu Weiya2, Wei Chengji1, Liu Yuewei1

 (1 Shenzhen Li Peng Building Structure Design Institute, Shenzhen 518034, China; 2 OCT Co., Ltd., Shenzhen 518053, China)

Abstract: There is almost no basis to ensure the damping ratio of steel and concrete composite structures in engineering. The calculation method of strain-energy damping was discussed. The force and displacement that used single damping value and the strain-energy damping value were compared by calculating examples. The results show that the all orders strain-energy damping ratio of composite structure is related to the vibrations level of members with different material in modal.The seismic calculation results of composite structure by using single damping ratio may underestimate the force of steel member or over value the force of concrete member. The strainenergy damping ratio method is more reasonable for composite structure.

Keywords: composite structure; strain-energy damping ratio method; damping matrix; damping ratio; calculation method

作者简介：孙仁范，硕士，高级工程师，Email：srf@163.com。

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