刚性系杆柔性拱桥模型试验研究

Model Test Study of a Rigid Tied Beam and Flexible Arch Bridge

新城黄河公路大桥为装配式预应力钢筋混凝土系杆拱桥,桥梁运营时间超过40年,在活载作用下存在明显的结构振动病害。为系统研究该桥动力特性,制作该桥模型进行动力试验,根据π定理推导出模型桥与实桥的频率相似关系,进而对模型桥试验结果与实桥测试结果进行分析比较,证明提出的相似关系正确,试验数据可信,并提出提高该桥低阶自振频率、提高桥面系刚度的建议。

Xincheng Huanghe River Highway Bridge is a assembled prestressed concrete tied arch bridge that has been in operation over 40 years and has evident structural vibration deterioration under the action of live load.To systematically study the dynamic behavior of the bridge,the model of the bridge was prepared and the dynamic tests were made.In accordance with the π principle,the frequency analogy relationship between the model bridge and actual bridge was derived,the test results of the model bridge and the m...