大件运输作用下空心板旧桥受力性能分析

Analysis of the Stress Performance of Hollow Slab Old Bridges under the Heavy-cargo Transportation

针对大件运输车辆需要通过旧桥的特殊情况,考虑旧桥技术状况,提出一种便捷的评估方法,从而进行桥梁承载能力验算,确定大件运输的可行性,并在通行过程中对该桥的动挠度进行监测,验证评估方法的有效性。分析认为,对带翼缘的空心板进行横向联系模拟时,考虑现浇层参与工作更符合实际受力情况。

In response to the special situation where heavy-cargo transport vehicles need to pass through old bridges,considering the technical condition of the old bridge,a kind of convenient evaluation method is put forward,so as to perform the checking calculation on the bearing capacity of the bridge,determine the feasibility of heavy-cargo transportation,and monitor the dynamic deflection of the bridge during the passage process to verify the effectiveness of the evaluation method.The analysis shows that,when performing the horizontal linkage simulation on the hollow slabs with flanges,the situation that the participation of the cast-in-place layer is more in line with the actual stress should be considered.