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[1]刘永健,吴浩伟,封博文,等.车轮荷载作用下双工字钢组合梁桥横桥向 焊钉拉拔效应[J].建筑科学与工程学报,2020,37(02):1-10.[doi:10.19815/j.jace.2019.09032]
　LIU Yong-jian,WU Hao-wei,FENG Bo-wen,et al.Tensile Effect of Welding Studs in Transverse Direction of Twin-I Steel Composite Girder Bridge Under Wheel Load[J].Journal of Architecture and Civil Engineering,2020,37(02):1-10.[doi:10.19815/j.jace.2019.09032]
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车轮荷载作用下双工字钢组合梁桥横桥向 焊钉拉拔效应(PDF)
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
37卷
期数:
2020年02期
页码:
1-10
栏目:
出版日期:
2020-03-30

文章信息/Info

Title:
Tensile Effect of Welding Studs in Transverse Direction of Twin-I Steel Composite Girder Bridge Under Wheel Load
文章编号:
1673-2049(2020)02-0001-10
作者:
刘永健,吴浩伟,封博文,张泽军,陆力伟
(长安大学 公路学院,陕西 西安 710064)
Author(s):
LIU Yong-jian, WU Hao-wei, FENG Bo-wen, ZHANG Ze-jun, LU Li-wei
(School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China)
关键词:
桥梁工程;  焊钉拉拔应力;  数值模拟;  双工字钢组合梁桥;  集束式焊钉
Keywords:
bridge engineering;  tensile stress of welding stud;  numerical simulation;  twin-I steel composite girder bridge;  group welding stud
分类号:
TU311
DOI:
10.19815/j.jace.2019.09032
文献标志码:
A
摘要:
针对双工字钢组合梁在车轮荷载作用下引起的钢混界面横桥向掀起效应导致焊钉出现拉拔应力的问题展开讨论,为分析此效应对双工字钢组合梁焊钉受力的影响从而为焊钉布置提供参考,对2×35 m双工字钢组合连续梁的焊钉拉拔应力分布规律及影响因素进行了研究。分析了6种采用不同单元类型、焊钉模拟方式、接触关系的ABAQUS有限元模型组合梁钢混界面横桥向掀起效应计算结果,通过对比已有文献中的试验结果,确定了合理的有限元模拟方法。基于此方法,分析了车轮荷载作用位置、加劲肋与横梁设置形式对焊钉拉拔应力沿纵横桥向分布的影响; 研究了横梁位置、桥面板厚度与主梁间距比、焊钉横桥向间距对焊钉拉拔应力的影响并讨论了焊钉拉拔应力对各参数的敏感性。结果表明:加劲肋限制了钢梁上翼缘随桥面板变形,导致焊钉产生明显拉拔应力; 焊钉应力沿纵桥向衰减速度很快; 设置横梁能减小双工字钢组合梁的侧向变形,导致焊钉拉拔应力大幅提高,最多能提高317.97%; 焊钉拉拔应力随着桥面板厚度与主梁间距比增大而逐渐减小,随着横梁中心线距钢梁上翼缘距离的增大呈现出先增大、后不变、最后略微减小的趋势,随焊钉横向间距增大出现先增大后减小的现象; 各参数中,桥面板厚度与主梁间距比对焊钉拉拔应力数值的影响最为显著; 根据焊钉拉拔应力分布规律及影响因素,建议应适当加密双工字钢组合梁加劲肋与横梁附近的焊钉。
Abstract:
In view of the tensile stress of the studs caused by the transverse bridge lifting effect of the steel-concrete interface of the twin-I steel composite girder under the wheel load, in order to analyze the effect on the stress of the welding studs of the twin-I steel composite girder and provide a reference for the arrangement of the welding studs, the stud tensile stress distribution law and influencing factors of 2×35 m twin-I steel composite continuous girder were studied. The calculation results of transverse bridge lifting effect of steel-concrete interface of composite girder based on six kinds of ABAQUS finite element models with different element types, weld stud simulation methods and contact relations were analyzed. By comparing the test results in the existing literature, a reasonable finite element simulation method was determined. Based on the method, the influences of wheel load position, stiffener and crossbeam setting on the distribution of stud tensile stress along the longitudinal and transverse bridge directions were analyzed. The influences of girder position, the ratio of the thickness of bridge deck to the distance between main girders, and the transverse bridge distance between welding studs on the tensile stress of welding studs were studied, and the sensitivity of tensile stress of welding studs to various parameters was discussed. The results show that the stiffener limits the deformation of the upper flange of the steel girder along with the bridge deck, which leads to the obvious tensile stress of the welding stud. The stress of welding stud decreases rapidly along the longitudinal direction of bridge. The setting of crossbeam can reduce the lateral deformation of twin-I steel composite girder, which leads to a great increase of stud tensile stress, up to 317.97%. With the increase of the ratio between the thickness of bridge deck and the distance between main girders, the tensile stress of welding stud decreases gradually. With the increase of the distance between the center line of girder and the upper flange of steel girder, the tensile stress increases firstly and then does not change, and finally decreases slightly. With the increase of the transverse distance between welding studs, the tensile stress increases firstly and then decreases. Among the parameters, the ratio of deck thickness to girder spacing has the most significant effect on the value of stud tensile stress. According to the distribution of tensile stress and its influencing factors, it is suggested that the welding studs near the stiffener and girder of twin-I steel composite girder should be properly densified.

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备注/Memo

备注/Memo:
收稿日期:2019-09-18
基金项目:陕西省交通运输厅科研项目(17-14K)
作者简介: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: 2020-04-21