大跨度斜拉桥箱桁组合截面应力分布研究
发布时间：2018-09-13 07:03
【摘要】：为研究斜拉桥箱桁组合截面主梁纵向应力在横向分布的不均匀性,以及箱桁组合后截面形心下移引起截面应力分布的改变,以沪通铁路长江大桥4线铁路方案为背景,采用精细化有限元分析的方法,对简单荷载工况作用下主梁纵向应力在桥面横向的分布形式,及沿纵向的变化规律开展研究,分析了剪力滞后、形心偏移等因素对主梁纵向应力的影响。结果表明:下弦钢箱除将列车荷载传递给主桁外,也与主桁一起参与结构受力;下弦钢箱底板应力均匀程度较好,顶板横向自弦杆外缘向两侧4m范围应力变化较大。
[Abstract]:In order to study the heterogeneity of longitudinal stress distribution in the main girder of box truss composite section of cable-stayed bridge, and the change of section stress distribution caused by the downward shift of section center after box truss combination, the paper takes the scheme of the 4th line of the Yangtze River Bridge of the Shanghai-Tongtong Railway as the background. Using the method of fine finite element analysis, the distribution form of longitudinal stress on the bridge deck and the variation law along the longitudinal direction of the main beam under simple load condition are studied, and the lag of shear force is analyzed. The influence of centroid deviation and other factors on the longitudinal stress of the main beam. The results show that the lower chord steel box not only transfers the train load to the main truss, but also takes part in the structural stress with the main truss, and the stress uniformity of the bottom plate of the lower chord steel box is good, and the stress of the transverse roof is changed greatly from the outer edge of the chord bar to the two sides in the 4 m range.
【作者单位】： 中铁大桥勘测设计院集团有限公司;
【分类号】：U448.27
[Abstract]:In order to study the heterogeneity of longitudinal stress distribution in the main girder of box truss composite section of cable-stayed bridge, and the change of section stress distribution caused by the downward shift of section center after box truss combination, the paper takes the scheme of the 4th line of the Yangtze River Bridge of the Shanghai-Tongtong Railway as the background. Using the method of fine finite element analysis, the distribution form of longitudinal stress on the bridge deck and the variation law along the longitudinal direction of the main beam under simple load condition are studied, and the lag of shear force is analyzed. The influence of centroid deviation and other factors on the longitudinal stress of the main beam. The results show that the lower chord steel box not only transfers the train load to the main truss, but also takes part in the structural stress with the main truss, and the stress uniformity of the bottom plate of the lower chord steel box is good, and the stress of the transverse roof is changed greatly from the outer edge of the chord bar to the two sides in the 4 m range.
【作者单位】： 中铁大桥勘测设计院集团有限公司;
【分类号】：U448.27
【参考文献】
相关期刊论文 前5条
1 欧阳永金;;大宽跨比连续钢箱梁桥的剪力滞效应研究[J];世界桥梁;2009年01期
2 秦顺全;高宗余;潘东发;;武汉天兴洲公铁两用长江大桥关键技术研究[J];桥梁建设;2007年01期
3 高宗余;;武汉天兴洲公铁两用长江大桥总体设计[J];桥梁建设;2007年01期
4 苏庆田;曾明根;吴冲;吴永昌;;珠江黄埔大桥北汊桥钢主梁应力不均匀性研究[J];桥梁建设;2007年06期
5 徐科英;肖海珠;;安庆长江铁路大桥主桥桥面系受力分析[J];桥梁建设;2012年03期
【共引文献】
相关期刊论文 前10条
1 任新见,江克斌,张光明;结构优化的APDL语言面向对象程序设计[J];四川建筑科学研究;2003年01期
2 刘兴远,林文修,张琦彬,邓安福;挑梁下纵横墙墙体荷载分布规律的ANSYS分析[J];四川建筑科学研究;2004年01期
3 任国亮,赵远翔,何英明;厂房框架模型空间作用试验研究与ANSYS建模分析[J];四川建筑科学研究;2004年01期
4 杨f，
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