Model Tests on Ultra-wide Steel Box Girder Section of Cable-stayed Rail-cum-road Bridge and Study on Effect of Live Loads

被引：0
|
作者：
Li G. [1 ]
Xiao L. [1 ]
Zhang W. [2 ]
Wei X. [1 ]
Zhao J. [1 ]
Wen Z. [1 ]
机构：
[1] School of Civil Engineering, Southwest Jiaotong University, Chengdu
[2] Southern Sichuan Intercity Railway Co., Ltd., Zigong
来源：
Tiedao Xuebao/Journal of the China Railway Society | 2023年 / 45卷 / 03期
关键词：
cable-stayed rail-cum-road bridge; live loads; model tests; ultra-wide steel box girder;
D O I：
10.3969/j.issn.1001-8360.2023.03.006
中图分类号：
学科分类号：
摘要：
To study the mechanical characteristics and live load effect of the ultra-wide steel box girder of the cable-stayed rail-cum-road bridge, based on the study of the ultra-wide steel box girder section of Yibin Lingang Yangtze River Bridge with a width of 63. 9 m, a model of the composite structure with a scale of 1 ∶10 was designed and constructed for static load model tests and finite element analysis, where the mechanical characteristics, longitudinal and transverse normal stress distribution and beam deformation characteristics of the ultra-wide steel box girder were investigated under the dead load condition, road vehicle load condition, railway train load condition and combination of different live load conditions. The results show that the box girder of the bridge has a significant lateral bending force behavior, with the girder body exhibiting the mechanical properties and deformation characteristics of a shoulder-supported girder under the live load conditions. The middle box shows the mechanical characteristics of a simply supported beam with positive bending moment under the load of the railway train, while the side boxes of the beam show the mechanical characteristics of the cantilever beam with a negative bending moment under the load of the road vehicles, pedestrians and non-motor vehicles, showing reasonable design of the cross-section of the girder body, clear live load action mechanism, and clear force transmission of the middle and side box structures. The research results provide important reference and design basis for the design and construction of ultra-wide steel box girders, and provide guidance for the design of similar bridges. © 2023 Science Press. All rights reserved.
引用
收藏
页码：47 / 54
页数：7
相关论文
共 16 条
  • [1] ZHAO Qiu, Steel Bridges: Steel Structure and Composite Structure Bridge, pp. 148-173, (2017)
  • [2] WANG Y L, SAUL R., Wide Cable-supported Bridges for Rail-cum-road Traffic [ J ], Structural Engineering International, 30, 4, pp. 551-559, (2020)
  • [3] WANG Y L, REN W M, HAN B, Et al., Conceptual Design of Cable-supported Bridges with Road and Railway Traffic, Structural Engineering International, 31, 4, pp. 488-497, (2021)
  • [4] CHANG Fuping, CHEN Liang, SHAO Changyu, Et al., Design of Main Bridge of Fenghuang Yellow River Bridge in Jinan [J], Bridge Construction, 51, 5, pp. 101-107, (2021)
  • [5] HU Huiyue, XU Gongyi, ZHANG Yanfei, Key Techniques for Design of Main Girder of Main Bridge of Wuhan Qingshan Changjiang River Highway Bridge, Bridge Construction, 48, 5, pp. 81-85, (2018)
  • [6] ZHANG Jianqiang, SUN Lishan, HU Huiyue, Et al., Analysis of Main Girder Mechanical Property of Main Bridge of Qingshan Changjiang River Highway Bridge in Wuhan [ J ], Bridge Construction, 50, pp. 26-31, (2020)
  • [7] CHEN Guohong, XU Zhao, Study of Mechanical Property of Main Girder for Long-span Steel-Concrete Composite Girder Cable-stayed Bridge, Bridge Construction, 49, 5, pp. 39-44, (2019)
  • [8] ZHANG Y H., Improved Finite-segment Method for Analyzing Shear-lag Effect in Thin-walled Box Girders, Journal of Structural Engineering, 138, 10, pp. 1279-1284, (2012)
  • [9] LI Y S, WANG J P, LIU W, Et al., The Finite Element Analysis on Shear-lag Effect of the Steel Box-girder [ J ], Advanced Materials Research, 671, pp. 815-819, (2013)
  • [10] WANG Bo, Force Analysis of Super-wide Steel Girder Boxes of Two-tower Single-cable Plane Cable-stayed Bridge, (2016)
12