[1]李通、时强、王新武、叶重阳.耗能梁段腹板开孔对偏心支撑钢框架抗震性能影响[J].郑州大学学报(工学版),2021,42(02):38-43.[doi:10.13705/j.issn.1671-6833.2021.02.011]
　Li Tong,Shiqiang,Wang Xinwu,et al.Influence of Web Openings of Link on Seismic Behavior of Eccentrically Braced Steel Frames[J].Journal of Zhengzhou University (Engineering Science),2021,42(02):38-43.[doi:10.13705/j.issn.1671-6833.2021.02.011]

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耗能梁段腹板开孔对偏心支撑钢框架抗震性能影响()

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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

42卷

期数:

2021年02期

页码:

38-43

栏目:

出版日期:

2021-04-12

文章信息/Info

Title:

Influence of Web Openings of Link on Seismic Behavior of Eccentrically Braced Steel Frames

作者:

李通、时强、王新武、叶重阳

河南科技大学土木工程学院;洛阳理工学院河南新型土木工程结构国际联合实验室;武汉理工大学理学院;

Author(s):

Li Tong; Shiqiang; Wang Xinwu; Ye Chongyang;

School of Civil Engineering, Henan University of Science and Technology; International Joint Laboratory of Henan New Civil Engineering Structure of Luoyang Institute of Technology; School of Science and Technology of Wuhan University of Technology;

关键词:

可替换耗能梁; 偏心支撑; 有限元; 开孔率; 滞回性能

Keywords:

replaceable shear links;  eccentrically supported frame;  finite element;  opening ratios;  hysteretic behavior

DOI:

10.13705/j.issn.1671-6833.2021.02.011

文献标志码:

A

摘要:

可替换耗能梁便于震后修复加固或者直接替换。对一个带可替换耗能梁段的偏心支撑钢框架进行了拟静力试验研究，得到带可替换耗能梁段的偏心支撑钢框架滞回性能和破坏模式。根据试验结果对耗能梁段构造进行改进，并建立了多个不同耗能梁段腹板开孔率的K型偏心支撑框架有限元模型，对其滞回性能进行了非线性数值分析。研究表明，有限元分析与试验结果吻合较好，耗能梁段腹板开孔能够有效降低框架梁的应力水平，保障较大的塑性变形发生在耗能梁段以内。随着开孔率的增加，框架的极限承载力，初始刚度，耗能能力均曾呈下降趋势。研究为同类结构的抗震设计提供了依据，并能够指导相关工程的设计。

Abstract:

Pseudo-static cyclic loading tests of a single-layer and single span prefabricated eccentrically braced steel frames were carried out and the test results were simulated by ABAQUS software. On the basis of reasonable results, five finite element models were established. The influence of web openings on seismic behavior of prefabricated eccentrically braced steel frames was analyzed from bearing capacity, stiffness degradation and energy dissipation capacity. The results showed that the opening ratio of web of link had influence on its bearing capacity in the monotonic load, the yield bearing capacity and ultimate bearing capacity of model decreases with the web opening ratio. Under cyclic loading, the initial stiffness of the model decreased with the increased of web opening ratio. The energy consumption capacity of model was not affected obviously by the opening ratio, except for BASE model: the energy consumption coefficients of other models are around 1.55. Appropriate increase of opening ratio could improve the ductility coefficient of the model, however, too large opening ratio would lead to premature failure of the component, which would make the reduction of ductility coefficient.

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