大件运输车载下连续T梁桥偏载效应分析  

ANALYSIS OF ECCENTRIC LOAD EFFECT OF CONTINUOUS T-SHAPED GIRDER BRIDGE UNDER CUSTOMIZED TRANSPORTATION VEHICLE

作　　者：刘韬 上官煜 Liu Tao;Shang Guan-Yu

机构地区：[1]江西省交通投资集团有限责任公司,南昌330025 [2]长安大学公路学院,西安710064

出　　处：《建筑技术开发》2022年第19期111-113,共3页Building Technology Development

基　　金：江西省交通运输厅科技项目(2022H0013)。

摘　　要：为分析大件运输车载下连续T梁桥的偏载效应,提高大件运输评审效率,基于10条高速公路的T梁桥信息,遴选出典型T梁桥,建立梁格法有限元模型,选取双轴线12联轴大件车进行加载,分析T梁桥的响应规律。结果表明:大件车偏载作用下,边跨荷载效应较次边跨大,偏载作用侧的主梁荷载效应值与偏离距离正相关,另一侧反之;偏载作用侧,正弯矩效应在边梁与次边梁达到峰值,负弯矩效应在边跨次边梁与次边跨中梁达到峰值,而剪力效应峰值均出现在边跨与次边跨的中梁处。由此可见,大件车载偏离距离对荷载效应值有较大影响,偏载作用侧边梁与次边梁正弯矩效应较为不利,中梁剪力效应和负弯矩效应较为不利。In order to analyze the response law of continuous T-shaped girder bridges(TGB) under the eccentric load of customized transportation vehicle(CTV),improve the evaluation efficiency of Customized transportation,based on the information of TGB bridges on 10 expressways,prototype TGB is selected and the corresponding finite element model is established through lattice method in ANSYS.Then,dual 12-axle CTV is selected for loading and the response law of TGB is analyzed.The result shows that:under the eccentric load of CTV,the load effect of the side span is larger than that of the secondary side span;on the side which eccentric load acts,positive bending moment reaches their peak value in the middle girder,negative bending moment peaks at the secondary side girder of side span and the middle girder of secondary side span,shear force reaches its peak value in the middle girder.It can be seemed that the eccentric distance has a significant impact on the load effect.On the side of the eccentric load,positive bending moment more unfavorable for side girder and secondary side girder,Shear force and negative bending moment is more unfavorable for middle girder.

关 键 词：大件运输 T梁桥 偏载 响应规律 

分 类 号：U44[建筑科学—桥梁与隧道工程]