论文部分内容阅读
近几年来,国外建筑成一批无横隔多主梁桥。由于这种桥具有结构简单、制造与安装方便等特点,颇受施工单位欢迎。节省多主梁的横隔,是否会削弱结构的整体作用,导致钢筋混凝土主梁受力较大,要用较多拉力钢筋或增大截面呢?目前说法不一。有些文献作者认为,节省横梁,能减轻主梁负担;另一些文献认为,横向刚度愈大,桥梁整体作用愈好,愈省主梁材料。为此,有必要通过多主梁桥有无横隔梁的模型结构试验,检验无横隔梁与有横隔梁两种桔构型式在静载的作用下空间整体工作情况,并探讨无横隔多主梁桥能否在我国推广使用。
In recent years, foreign construction into a group of multi-girder bridge without diaphragm. Because of this bridge has a simple structure, manufacturing and installation features such as convenience, welcomed by the construction unit. Saving the multi-girder of the diaphragm, will weaken the overall effect of the structure, resulting in greater stress on the main beam of reinforced concrete, to use more tensile reinforcement or increase the cross-section it? Different opinions. Some authors believe that saving the beam, can reduce the burden on the main beam; other literature that the greater the lateral stiffness, the better the overall role of the bridge, the more the main girder material. Therefore, it is necessary to test the whole structure of the multi-girder bridge with and without cross-beam under the static load by testing the model structure with or without the cross-beam. Multi-girder bridge can be widely used in our country.