一种新型组合式钢横隔梁的设计与应用

Design and Application of New-type Composite Steel Diaphragm

增设钢横隔梁是一种常见的旧桥加固方式,但在位于重要交通线路上的桥梁增设钢横隔梁时,由于无法中断桥面交通,使得新增横隔梁被动受力,影响加固效果。受预应力结构的启发,对钢横隔梁施加一定的预应力,藉此平衡部分外荷载所引起的拉应力,从而改善加固效果,提高桥梁整体性。基于此理念,设计一种新型组合式钢横隔梁,并应用于实桥加固。

An extra steel diaphragmis a common way of reinforcement of existed bridges. But bridges in important traffic routes are still open to traffic even during steel diaphragminstallation,resulting in unpleasant force in the newdiaphragm. When prestress is applied to the steel diaphragm,it can reduce the tensile stress caused by external loads and improve reinforcement effect and integrity of the bridge. With this idea,a new-type of composite steel diaphragmis designed and applied to real bridge reinforcement.