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[1]闫新凯,刘永健,邢子寒,等.曲线双工字钢组合梁桥横梁受力分析研究[J].建筑科学与工程学报,2022,39(05):63-73.[doi:10.19815/j.jace.2022.02067]
　YAN Xin-kai,LIU Yong-jian,XING Zi-han,et al.Research on Internal Force of Crossbeam in Curved Steel-concrete Composite Twin I-girder Bridge[J].Journal of Architecture and Civil Engineering,2022,39(05):63-73.[doi:10.19815/j.jace.2022.02067]
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曲线双工字钢组合梁桥横梁受力分析研究(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
39卷
期数:
2022年05期
页码:
63-73
栏目:
结构工程
出版日期:
2022-09-30

文章信息/Info

Title:
Research on Internal Force of Crossbeam in Curved Steel-concrete Composite Twin I-girder Bridge
文章编号:
1673-2049(2022)05-0063-11
作者:
闫新凯1,刘永健1,2,邢子寒1,封博文1,陈 霄1
(1. 长安大学 公路学院,陕西 西安 710064; 2. 长安大学 公路大型结构安全教育部工程研究中心,陕西 西安 710064)
Author(s):
YAN Xin-kai1, LIU Yong-jian1,2, XING Zi-han1, FENG Bo-wen1, CHEN Xiao1
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. Research Center of Highway Large Structure Engineering on Safety of Ministry of Education, Chang'an University, Xi'an 710064, Shaanxi, China)
关键词:
曲线双工字钢组合梁桥;  横梁;  符拉索夫薄壁结构理论;  数值模拟
Keywords:
curved steel composite twin I-girder bridge;  crossbeam;  Vlasov's thin-wall structure theory;  numerical simulation
分类号:
TU311
DOI:
10.19815/j.jace.2022.02067
文献标志码:
A
摘要:
为了研究主梁腹板纵桥向翘曲变形对横梁内力的影响,在现有横梁框架模型基础上,根据符拉索夫薄壁结构理论得到集中荷载作用下简支曲线双工字钢组合梁桥翘曲变形、结构扭转角等物理参数沿跨径的分布规律。利用主梁腹板与横梁的变形协调关系分析横梁的纵桥向变形,得到横梁内力组成以及截面正应力分布规律并进行有限元分析验证。结果表明:基于符拉索夫薄壁结构理论分析得到的横梁截面正应力分布规律与有限元计算得到的规律基本一致; 靠近加载点的横梁正应力以“竖向弯曲效应”为主导,靠近支座截面的横梁“腹板变形不一致效应”大于加载点截面附近横梁; 加载点截面两侧腹板翘曲变形方向相反,导致横梁的截面正应力分布规律相反; 横梁竖向弯曲变形产生的应力与主梁弯矩分布规律类似,纵桥向弯曲变形产生的应力与扭率分布规律类似。
Abstract:
In order to study the influence of the longitudinal warpage deformation of the main beam web on the internal force of the crossbeam, on the basis of the existing crossbeam frame model, the distribution laws of physical parameters such as warpage deformation and structural torsion angle of a simply supported curved steel-concrete composite twin-I girder bridge under concentrated load were obtained through the Vlasov's thin-wall structure theory. The deformation coordination relationship between the main beam web and the crossbeam was used to analyze the longitudinal deformation of the crossbeam. The internal force composition of the crossbeam and the normal stress distribution law of the section were obtained and verified by the finite element analysis. The results show that the positive stress distribution law of the crossbeam based on Vlasov's thin-wall structure theory is basically consistent with the law obtained from finite element calculation. The crossbeam positive stresses near the loading point are dominated by the “vertical bending effect”, and the “web deformation inconsistency effect” of the crossbeam near the bearing section is greater than that of the crossbeam near the loading point section. The warpage deformations of the web on both sides of the loading point section are in opposite directions, which leads to the opposite distribution of the crossbeam positive stress. The distribution law of stress generated by the crossbeam vertical bending deformation is similar to that of the main beam bending moment, and distribution law of the stress generated by the longitudinal bending deformation is similar to that of the torsion rate.

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备注/Memo

备注/Memo:
收稿日期:2022-02-12
基金项目:陕西省交通运输厅科研项目(17-14K)
作者简介:闫新凯(1996-),男,陕西洋县人,工学博士研究生,E-mail:313509326@qq.com。
通信作者:刘永健(1966-),男,江西玉山人,教授,博士研究生导师,工学博士,E-mail:lyj.chd@gmail.com。
更新日期/Last Update: 2022-09-30