STRESS BEHAVIOR AND THEORETICAL CALCULATION OF STEEL-CONCRETE JOINT OF RAILWAY HYBRID GIRDER

被引：0
|
作者：
Shi Z. [1 ]
Zhang Y. [1 ]
Li Y.-M. [1 ]
He Z.-M. [2 ]
Shi J.-W. [2 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Sichuan, Chengdu
[2] Hanbanan Intercity Railway Co., Ltd., Sichuan, Bazhong
来源：
Gongcheng Lixue/Engineering Mechanics | 2024年 / 41卷
关键词：
bearing plate; force mechanics; railway hybrid girder; shear key; steel-concrete joint;
D O I：
10.6052/j.issn.1000-4750.2023.05.S031
中图分类号：
TU3 [建筑结构];
学科分类号：
081304 ; 081402 ;
摘要：
To study the stress characteristics and theoretical calculation formulas of the steel-concrete joint of railway hybrid girder, based on the existing calculation formulas of steel-concrete joint of highway bridges, the checking formulas for joint stress, shear connectors of top and bottom plates and load transmission of bearing plate of railway hybrid girders were put forward. Taking the Jialing River Bridge of Hanzhong to Bazhong & Nanchong Railway with a main span of 335 m as the research background, a finite element analysis (FEA) was conducted to explore the stress characteristics and the longitudinal and lateral stress distribution law of the joint, and then a comparative analysis was done between the formula and FEA. The FEA results show that the lateral stress distributions of steel and concrete of the joint at different cross-section are all uneven. The formula verification results indicate that the concrete of the joint is in compressive, meeting the requirements on section stress. The shear connector resistance coefficient ranges from 1.30 to 4.49, indicating adequate safety reserves. The resistance coefficient of bearing plates is between 3.18 and 10.08, showing that the resistance of front and rear bearing plates is much greater than the calculated load, and there is a room for optimization. The stresses of concrete and shear connectors on the top and bottom of the joint calculated by theoretical formula are generally similar to FEA results and can be used to calculate the anti-cracking/detachment and shear stress of steel-concrete joint after modification. © 2024 Tsinghua University. All rights reserved.
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页码：282 / 291
页数：9
相关论文
共 17 条
  • [1] SHI Zhou, GU Jiachang, YU Wanqing, Et al., Study on the mechanical behavior of bi-directionally curved composite pylon steel-concrete joints for a long-span cable-stayed bridge, China Journal of Highway and Transport, 35, 6, (2022)
  • [2] QIN Fengjiang, ZHOU Xuhong, LIANG Bowen, Et al., Experiment on steel-concrete joint of hybrid girder of a long-span self-anchored suspension bridge [J], China Journal of Highway and Transport, 31, 9, (2018)
  • [3] HE S H, MOSALLAM A S, FANG Z, Et al., Structural evaluation of steel–concrete joint with UHPC grout in single cable–plane hybrid cable-stayed bridges, Journal of Bridge Engineering, 24, 4, (2019)
  • [4] CHENG X, NIE X, FAN J S., Structural performance and strength prediction of steel-to-concrete box girder deck transition zone of hybrid steel-concrete cable-stayed bridges, Journal of Bridge Engineering, 21, 11, (2016)
  • [5] CAI Jianye, Design for steel-concrete joint segment of cable-stayed bridge with hybrid girder, Railway Standard Design, 58, 1, (2014)
  • [6] LI Xiaozhen, WANG Cong, XIAO Lin, Et al., Test study for mechanical behavior of steel-concrete composite girder of cable-stayed bridge, Engineering Mechanics, 32, 9, (2015)
  • [7] YAO Yadong, YAO Chaoyi, YANG Yongqing, Time-dependent creep and shrinkage analysis of steel-concrete composite segment of cable-stayed railway bridge, Journal of the China Railway Society, 42, 7, (2020)
  • [8] CHEN Debao, LIN Zhiping, SU Qingtian, Et al., Structural optimization and experiment of steel-concrete composite segment in hybrid-girder rigid frame bridges, Engineering Mechanics, 40, 8, (2023)
  • [9] SHI Zhou, GU Jiachang, LI Yingming, Et al., Mechanical properties of an innovative steel–concrete joint for high-speed railway long-span hybrid girder cable-stayed bridges, Engineering Structures, 300, (2024)
  • [10] ZHAN Yulin, ZHAO Renda, MAO Xueming, Et al., Model test of steel and concrete joint section of Dongping bridge [J], Bridge Construction, 4, (2011)
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