T形截面钢梁桥模型实验研究  

Experimental Research of Steel T-girder Bridge Model

作　　者：曹国辉[1] 张锴[1] 宋建义[1] 王志宏[1] 

机构地区：[1]湖南城市学院土木工程学院,湖南益阳413000

出　　处：《实验室研究与探索》2012年第12期31-34,共4页Research and Exploration In Laboratory

基　　金：湖南省普通高校教学改革研究项目(湘教通[2008]263号(178)

摘　　要：为了研究中横隔梁对T形梁桥荷载横向分布的影响,制作了2个T形钢梁桥实验模型,每个模型由5片T梁肋组成,其中一个有中横隔梁,一个无中横隔梁。用Midas/civil有限元分析软件建立了T形梁桥实验模型,进行了理论计算与分析,并与实测值进行了比较。结果表明,有中横隔梁的T形梁桥模型的整体刚度相对较大,各单片梁肋间的传力较好,故各梁肋的荷载横向分布系数接近直线分布;无中横隔梁T形梁桥由于仅有桥面板传递剪切变形,在对称及偏心荷载作用下,集中荷载作用梁肋的应变与挠度均较大,荷载横向分布呈不均匀现象。In order to study the influence of middle diaphragm beam on the load transverse distribution of T-shape beam bridges,two steel T-girder bridge models were developed,one of which has a middle diaphragm and the other has no diaphragm.Each model was made of five pieces of T-beam of rib.The theoretical data were calculated by Midas/civil finite element analysis software,and compared with the data of model experiment.The result shows that the middle diaphragm between the T-girder bridge has relatively large overall rigidity,and the force transmission between each girder is much better;However,as far as the T-girder bridge without the middle diaphragm is concerned,since there is only the bridge panel to transfer the shearing deformation,in a symmetrical and eccentric loads,the concentrated load rib strain and deflection of the beam are bigger,and the load distribution have a non-uniform horizontal phenomenon.The experiment can be used for the open experimental teaching of civil engineering professional students.

关 键 词：T形钢梁桥模型 中横隔梁 荷载横向分布系数 开放性实验教学 

分 类 号：G642.0[文化科学—高等教育学]