Comparative analysis on earthquake action calculation methods of cable dome structures

被引：0
|
作者：
Qiao Y. [1 ,2 ]
Liu H. [1 ,2 ]
Deng H. [1 ,2 ]
Dong S. [1 ]
机构：
[1] Space Structures Research Center, Zhejiang University, Hangzhou
[2] Center for Balance Architecture, Zhejiang University, Hangzhou
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2023年 / 44卷 / 12期
关键词：
cable dome; earthquake action calculation; modal participating mass factor; mode superposition response spectrum method; Rayleigh damping model; time history method;
D O I：
10.14006/j.jzjgxb.2022.0611
中图分类号：
学科分类号：
摘要：
Due to the structural nonlinearity, the earthquake action calculation method for the flexible long-span roof structures, typical cable domes, has not been specified in the GB 50011—2010 ‘Code for seismic design of buildings’. For the equilibrium configuration under the representative value of gravity load, the applicability of the mode-superposition response spectrum method to calculate the earthquake action of cable dome structures is investigated by comparing the calculation results with those obtained by the time history method. Artificial seismic waves are generated according to the design response spectrum and employed in the time history analysis to ensure the consistency of seismic inputs. It is pointed out that the Rayleigh damping coefficients should be determined based on the mode shapes dominantly contributing to the earthquake action of the roof cable dome structure, otherwise a significant overestimation of the structural damping effect will occur in the time history analysis and result in an underestimation of the obtained structural seismic responses. Based on the modal participating mass factor, an index is proposed for judging the mode shapes which are dominantly contributing to the earthquake action of the roof cable dome structure. The two methods are employed to calculate structural responses of cable dome structures under the frequent-occurred earthquake corresponding to different deflection-span ratio limits (prestress levels). For the illustrative Geiger and Levy cable domes that both satisfy the non-seismic design check, the calculation results show that the structural seismic responses obtained by the mode-superposition response spectrum method well match with those obtained by the time history method, and its applicability for the seismic action calculations of this type of flexible roof structure is verified. © 2023 Science Press. All rights reserved.
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页码：59 / 71
页数：12
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