吉林大学学报(工学版) ›› 2026, Vol. 56 ›› Issue (1): 209-218.doi: 10.13229/j.cnki.jdxbgxb.20240607

• 交通运输工程·土木工程 • 上一篇    下一篇

超大跨波形钢腹板箱梁弯扭耦合性能试验

张皓1(),陈宜言1,叶俊宇1,董桔灿2,赵秋1()   

  1. 1.福州大学 土木工程学院,福州 350108
    2.云基智慧工程股份有限公司,广东 深圳 518000
  • 收稿日期:2024-05-31 出版日期:2026-01-01 发布日期:2026-02-03
  • 通讯作者: 赵秋 E-mail:470268065@qq.com;zhaoqiu@fzu.edu.cn
  • 作者简介:张皓(1995-),男,博士研究生. 研究方向:钢混组合结构. E-mail: 470268065@qq.com
  • 基金资助:
    福建省自然科学基金项目(2019J01232)

Experiment on bending-torsional performance of super- span box girders with corrugated steel webs

Hao ZHANG1(),Yi-yan CHEN1,Jun-yu YE1,Ju-can DONG2,Qiu ZHAO1()   

  1. 1.School of Civil Engineering,Fuzhou University,Fuzhou 350108,China
    2.Yunji Intelligent Engineering Limited Company,Shenzhen 518000,China
  • Received:2024-05-31 Online:2026-01-01 Published:2026-02-03
  • Contact: Qiu ZHAO E-mail:470268065@qq.com;zhaoqiu@fzu.edu.cn

摘要:

本文设计并开展了3根超大跨波形钢腹板组合箱梁弯扭耦合试验,得到了试验梁的破坏模式、扭矩-扭率曲线、弯矩-位移曲线以及应变分布规律等。然后,基于已验证有限元法进行参数化分析,根据超大跨波形钢腹板组合箱梁的破坏模式,提出了弯扭耦合关系曲线以及简化承载力计算方法。结果表明:在弯扭耦合作用下组合箱梁的破坏形式可分为弯型破坏和扭型破坏,分别以混凝土顶板被压碎和混凝土底板剥落为标志;弯型破坏时腹板的整体屈曲现象主要集中在弯剪扭段,而扭转破坏时腹板的整体屈曲现象主要集中在弯扭段;在一定范围内,弯矩的存在使组合箱梁的抗扭强度得到加强;建立的弯扭耦合关系曲线和简化承载力计算方法均具有较高精度,最大误差不超过6%。

关键词: 桥梁与隧道工程, 超大跨, 波形钢腹板, 破坏模式, 弯扭耦合关系曲线, 简化承载力计算方法

Abstract:

Three super-span composite box girders with corrugated steel webs (CSW) under combined bending and torsion were designed and experimentally investigated in this paper, and the failure modes, torque-twist curves, bending moment-displacement curves, and strain distribution laws were obtained. Based on the verified finite element analysis (FEA) method, a parametric analysis was carried out. The bending-torsional relationship curves and the simplified calculation method for capacity were proposed according to the failure modes. The results show that the failure modes of the composite box girders are the bending and torsional failure, with crushing of the concrete top slab and spalling of the concrete bottom slab, respectively. Global buckling of bending failure occurs in the bending-shear-torsional section, whereas that of torsional failure is concentrated in the bending-torsional section. The bending moment enhances the torsional strength of the composite box girders within a certain range. The proposed bending-torsional relationship curves and the simplified calculation method both provide high accuracy, with a maximum error of less than 6%.

Key words: bridge and tunnel engineering, super-span, corrugated steel webs, failure modes, bending-torsional relationship curves, simplified load capacity calculation method

中图分类号: 

  • U488.21

图1

试设计桥梁(单位:m)"

图2

构件尺寸"

表1

试验梁材料属性"

试验梁混凝土抗压强度/MPa波形钢腹板屈服强度/MPa钢筋屈服强度/MPa预应力筋拉伸强度/MPa
S-151.22604101 860
S-250.5260405
S-350.9260403

图3

加载装置"

图4

应变片布置"

图5

破坏模式"

图6

混凝土开裂模式"

图7

腹板屈曲模式"

图8

扭矩-扭率曲线"

图9

弯矩-位移曲线"

图10

扭矩-剪应变曲线"

图11

有限元模型"

图12

有限元模型验证"

表2

有限元扭矩结果比较"

试验梁加载方式弹性阶段开裂阶段腹板屈服阶段极限承载力阶段破坏模式
Te,Exp/(kN·m)Te,FEA/(kN·m)Te,ExpTe,FEATcr,Exp/(kN·m)Tcr,FEA/(kN·m)Tcr,ExpTcr,FEATwy,Exp/(kN·m)Twy,FEA/(kN·m)Twy,ExpTwy,FEATu,Exp/(kN·m)Tu,FEA/(kN·m)Tu,ExpTu,FEA
S-1先弯后扭164.81169.100.975458.03461.720.992570.26543.981.048扭型破坏
S-2先扭后弯158.62161.370.983453.36451.391.004481.23457.371.052扭型破坏
S-3先扭后弯145.07139.941.037弯型破坏

表3

有限元弯矩结果比较"

试验梁加载方式弹性阶段开裂阶段腹板屈服阶段极限承载力阶段破坏模式
Me,Exp/(kN·m)Me,FEA/(kN·m)Me,ExpMe,FEAMcr,Exp/(kN·m)Mcr,FEA/(kN·m)Mcr,ExpMcr,FEAMwy,Exp/(kN·m)Mwy,FEA/(kN·m)Mwy,ExpMwy,FEAMu,Exp/(kN·m)Mu,FEA/(kN·m)Mu,ExpMu,FEA
S-1先弯后扭134.35121.601.105扭型破坏
S-2先扭后弯910.23882.951.031扭型破坏
S-3先扭后弯275.60281.890.978769.90782.350.9841 043.931 027.851.016弯型破坏

图13

参数化分析"

图14

弯扭耦合关系曲线"

图15

弯扭耦合简化曲线"

表4

参数化结果分析"

有限元梁加载方式有限元αFαNαSαN/αFαS/αF破坏模式
T/(kN·m)M/(kN·m)
S-11先弯后扭584.54202.700.1770.1790.1851.0111.045扭型破坏
S-12先弯后扭610.40304.060.2540.2550.2671.0041.051扭型破坏
S-13先弯后扭605.23456.080.3850.3830.3790.9950.984扭型破坏
S-14先弯后扭543.15760.140.7140.7060.7250.9891.015扭型破坏
S-15先扭后弯103.461 021.635.0405.0605.0001.0040.992弯型破坏
S-16先扭后弯232.781 028.722.2562.1692.2220.9610.985弯型破坏
S-17先扭后弯362.101 033.791.4571.4421.4290.9900.981扭型破坏
平均值0.9931.007
标准差0.0150.028
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