新旧桥扩宽施工中减振措施的研究

以简支桥梁为例,建立新旧桥及车辆模型,以空间路面谱模拟的路面不平度作为振动激励源,针对各种不同等级路面和新旧桥之间不同横向连接形式下的车桥耦合振动响应进行分析。结果表明:路面等级越低振动越明显,钢筋混凝土横隔板连接形式对桥梁振动影响最小。

RESEARCH OF VIBRATION REDUCTION MEASURES FOR NEW AND OLD BRIDGE WIDENING PROJECT

In this paper,taking the simply supported beam bridge for example the new and old bridge models and the vehicle models were set up. It was analyzed vehicle-bridge coupling vibration response from different road grades and connections between new and old bridge using the spatial road spectrum to simulate the road roughness as vibration excitation. The results showed that the lower the level of the road,the vibration more obvious. The reinforced concrete diaphragm connection has minimal impact on the bridge vibration.