Research on anti-collapse performance of composite beam-column substructures with different beam line stiffness

被引：0

作者：

Tan Z. ^{[1
]}

Zhong W. ^{[1
,2
]}

Duan S. ^{[1
]}

Meng B. ^{[1
]}

Zheng Y. ^{[1
]}

Song X. ^{[1
]}

机构：

[1] School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an

[2] Key Lab of Structural Engineering and Earthquake Resistance, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an

来源：

Zhendong yu Chongji/Journal of Vibration and Shock | 2021年 / 40卷 / 10期

关键词：

Beam line stiffness; Composite beam-column substructure; Failure criterion; Progressive collapse; Quantitative assessment;

D O I：

10.13465/j.cnki.jvs.2021.10.008

中图分类号：

学科分类号：

摘要：

When a column of a steel frame structure fails, the two-bay beams connected with the failed column play a key role in the internal force redistribution and re-equilibrium of the remaining structure, at that time, the beam line stiffness has a significant impact on the collapse resistance of the structure. The quasi-static test results of a composite beam-column substructure with rigid connections were used to verify the finite element modeling method. The full-scale model of the composite beam-column substructure with different beam line stiffness was established and the influence of beam line stiffness on the internal force development and collapse resistance of the composite beam-column substructure were emphatically analyzed. The current structural failure criterion based on deformation was modified, and on this basis, the contribution of the flexural mechanism and catenary mechanism resistances was quantitatively analysed, providing a basis for structural collapse resistance design and a reference for practical engineering application. The analysis results show that the linear stiffness of the two-bay beams determines the resistance level of the flexural mechanism, while the span of the two-bay beams determines the resistance level of the catenary mechanism. The beam height has little influence on it, and the excessive beam line stiffness is not conducive to the displacement development of the structure. © 2021, Editorial Office of Journal of Vibration and Shock. All right reserved.

引用

页码：57 / 66

页数：9

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