中承式钢筋混凝土拱桥自振特性分析与动力荷载试验

桥梁结构的自振特性是结构动力分析和抗震分析的重要参数。该文通过建立有限元模型进行模态分析和动荷载试验分析来获得中承式钢筋混凝土拱桥的计算和实测自振特性,并测得了桥梁的自振频率、振型和阻尼比,并对实桥测试结果和计算结果进行分析、比较,得到该桥在动力荷载下的实际工作状态,以此判断该桥整体结构的安全承载能力和使用条件。

Self-vibration Characteristic Analysis and Dynamic Load Test of Half-through Steel Reinforced Concrete Arched Bridge

The self-vibration characteristic of bridge structure is the important parameter for the structural dynamic analysis and the anti-earthquake analysis.The article achieves the calculation and measured self-vibration characteristic of half-through steel reinforced concrete arched bridge by setting up the finite element model to carry out the modal analysis and the dynamic load test analysis,and the self-vibration frequency,the vibration type and relative damping ratio are measured. The article analyzes and compares the test result and the calculating result of the bridge to get the practical working status of this bridge under the dynamic load for finding out the safe bearing capacity and using condition of the whole bridge structure.