Parameter research on lateral stiffness of external prestressing self-centering frame

被引：0
|
作者：
Lu L. [1 ]
Zhao F. [1 ]
Xu Y. [2 ]
机构：
[1] Department of Disaster Mitigation for Structures, Tongji University, Shanghai
[2] Ningbo Architectural Design & Research Institute Co., Ltd, Ningbo
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2020年 / 41卷 / 07期
关键词：
Dynamic response; External prestressed self-centering frame; Finite element model; Lateral stiffness; Time-history dynamic analysis;
D O I：
10.14006/j.jzjgxb.2018.0460
中图分类号：
学科分类号：
摘要：
External prestressing self-centering frame (EPSCF) is a new type of aseismic structure system using structural control technology. Earthquake responses are mainly determined by the lateral stiffness of EPSCF. Firstly, the finite element model of EPSCF was established by ABAQUS software and verified by the shaking table test. Secondly, by changing the parameters of the prestressed tendons to change the lateral stiffness of the structure, the law of structural vibration characteristics changing with the relative stiffness ratio was revealed. Thirdly, the appropriate seismic waves were selected for elastic-plastic time-history analysis, and the responses of EPSCF structures with different relative stiffness ratios were presented, which generally showed that with the increase of relative stiffness ratio, the structural displacement response decreased, the structural acceleration and the base shear force increased; Finally, the curves of story drift amplification coefficient and base earthquake-reduction coefficient versus the change of relative stiffness ratio were obtained. Taking the base earthquake-reduction coefficient as the selection basis of the lateral stiffness, the range of relative stiffness ratio of EPSCF structure is 0.02-0.10. © 2020, Editorial Office of Journal of Building Structures. All right reserved.
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页码：27 / 35
页数：8
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