Experimental and numerical investigation of the flexural performance of channel steel-bolt joint for prefabricated subway stations

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外文摘要：Flexural performance of joints is critical for prefabricated structures.This study presents a novel channel steel-bolt(CB)joint for prefabricated subway stations.Full-scale tests are carried out to investigate the flexural behavior of the CB joint under the design loads of the test-case station.In addition,a three dimensional(3D)finite element(FE)model of the CB joint is established,incorporating viscous contact to simulate the bonding and detachment behaviors of the interface between channel steel and concrete.Based on the 3D FE model,the study examines the flexural bearing mechanism and influencing factors for the flexural performance of the CB joint.The results indicate that the flexural behavior of the CB joint exhibits significant nonlinear characteristics,which can be divided into four stages.To illustrate the piecewise linearity of the bending moment-rotational angle curve,a four-stage simplified model is proposed,which is easily applicable in engineering practice.The study reveals that axial force can enhance the flexural capacity of the CB joint,while the preload of the bolt has a negligible effect.The flexural capacity of the CB joint is approximate twice the value of the designed bending moment,demonstrating that the joint is suitable for the test-case station.

外文关键词：

channel steel-bolt jointflexural performancefull-scale testnumerical simulationprefabricated subway station

作者：

Lei WANG、Shengyang ZHOU、Xiangsheng CHEN、Xian LIU、Shuya LIU、Dong SU、Shouchao JIANG、Qikai ZHU、Haoyu YAO

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作者单位：

College of Civil and Transportation Engineering,Shenzhen University Shenzhen 518060,China

Key Laboratory of Coastal Urban Resilient Infrastructures(MOE),Shenzhen University Shenzhen 518061,China

Shenzhen Key Laboratory of Green,Efficient and Intelligent Construction of Underground Metro Station,Shenzhen University,Shenzhen 518061,China

College of Civil Engineering,Tongji University,Shanghai 200092,China

Shenzhen Municipal Design & Research Co.,Ltd.,Shenzhen 518029,China

Shenzhen Metro Group Co.,Ltd.,Shenzhen 518026,China

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基金：

Key Research and Development Program of Guangdong ProvinceNational Natural Science Foundation of ChinaNatural Science Foundation of Shenzhen

项目编号：

2019B11110500151938008JCYJ20210324094607020

出版年：

2024

DOI：

10.1007/s11709-024-1068-0

结构与土木工程前沿

高等教育出版社

结构与土木工程前沿

CSTPCDEI

影响因子：0.082

ISSN：2095-2430

年,卷(期)：2024.18(6)