Study of Panel Zone Behavior in Interior Beam–Column Joints with Reduced Beam Section (RBS)

Author:

Yang Ke-Jia1,Yang Yang23,Ye Heng24,Li Wei24ORCID,Yang Zhao-Yu25

Affiliation:

1. College of Civil Engineering and Architecture, Taizhou University, Taizhou 318000, China

2. College of Civil Engineering and Architecture, Wenzhou University, Wenzhou 325035, China

3. Wenzhou Chengjian Grput Co., Ltd., Wenzhou 325000, China

4. Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province, Wenzhou 325035, China

5. Wenzhou Engineering Technical Research Center on Building Energy Conservation and Emission Reduction & Disaster Prevention and Mitigation, Wenzhou 325035, China

Abstract

Based on the post-earthquake investigation of the Beiling and Hanshen earthquakes, many welded rigid beam–column joints were found to exhibit brittle failure. The failure modes of the joint region and the overall steel frame structure under the action of the earthquake need to be studied. The seismic performance of different types of weakened beam-end interior joints was investigated. The finite element method was verified by high-strength steel beam–column joint tests conducted by our research team. Finite element modeling of weakened steel beam flanges and weakened steel beam web joints was carried out based on the validated finite element modeling method. The joints were studied and analyzed using seismic parameters such as joint stress clouds, equivalent story shear–inter-story displacement ratio curves, panel zone bending moment–shear ratio curves, ductility, stiffness, and energy dissipation. The results of this study showed that honeycomb open hole-type joints exhibit a better deformation and energy dissipation capacity compared to open circular web hole-type joints. However, their load carrying capacity is reduced, which is mainly due to the larger area of the web openings. Additionally, double reduced beam section (DRBS) joints exhibit superior seismic performance and plastic hinge outward movement characteristics compared to single reduced beam section (RBS) joints. It was also found that the deformation and energy dissipation of DRBS joints and steel beam honeycomb hole-type joints are mainly borne by the beams, with the panel zone’s participation in energy dissipation accounting for a smaller proportion of the energy.

Funder

Construction scientific research project of Department of Housing and Urban-Rural Development of Zhejiang Province

National Natural Science Foundation of China

Zhejiang Province Public Welfare Technology Application Research Project

Wenzhou Association for Science and Technology

Publisher

MDPI AG

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