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.%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.
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