集中荷载作用下箱梁剪力滞效应分析  

Analysis of shear lag effect of box girder under concentrated load

作　　者：王赞芝[1] 于世龙[1] 张余萍[1] 李亚红[1] 郝天之 王淼[3] 江林雁[4] 

机构地区：[1]广西科技大学土木建筑工程学院,广西柳州545006 [2]广西交通科学研究院,广西南宁530007 [3]柳州铁道职业技术学院,广西柳州545007 [4]中煤邯郸设计工程有限责任公司,河北邯郸056031

出　　处：《广西科技大学学报》2017年第1期41-45,90,共6页Journal of Guangxi University of Science and Technology

基　　金：国家自然科学基金项目(51009030);北部湾经济区科技园区创新创业人才培育项目(桂科计[2015]245号-2)资助

摘　　要：为了了解集中荷载作用下,连续直线单箱梁在弹性工作阶段的力学性能,利用有限元软件及有机玻璃模型试验对两跨连续直线单箱梁进行分析.在第一跨跨中施加不同的集中荷载,分析每跨跨中顶板与底板横截面的剪力滞效应.通过采集的试验数据分析得出:在不同集中荷载作用下,第一跨跨中顶板与底板出现剪力滞效应,第二跨跨中剪力滞效应微小,荷载大小对剪力滞系数影响不大.In order to investigate the elastic mechanical properties of continuous box girder subjected to concentrative load, a two-span continuous box girder bridge was chosen and both FEM software and model experiment were used to analyze it. At the middle of first span of the bridge, a series of concentrative loads were applied successively, the coefficients of top plate and bottom plate in both spans were calculated, respectively. The results show that： under a large variety of concentrative loads, there exist apparent shear lag effects on the top plate and the bottom plate of the first span in which the concentrative load was applied, and on the contrary, the second span in which no loads were applied has only a tiny effect of shear lag, and also the magnitude of load does not have great effect on the shear lag coefficients of the second span.

关 键 词：桥梁工程 箱梁桥 剪力滞后 数值分析 试验研究 

分 类 号：U448.21[建筑科学—桥梁与隧道工程]