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首页> 外文会议>ASME(American Society of Mechanical Engineers) Pressure Vessels and Piping Conference vol.8: Seismic Engineering; 20050717-21; Denver,CO(US) >FIELD TESTS AND SIMULATION OF LION-HEAD RIVER BRIDGE
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FIELD TESTS AND SIMULATION OF LION-HEAD RIVER BRIDGE

机译：狮子头河大桥的现场测试与模拟

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摘要

Lion-Head River Bridge is a parallel twin bridge. The East Bridge was designed and constructed as a traditional prestressed concrete box of bridge (Pot Bearings); and the West Bridge used seismic isolation devices (Lead Rubber Bearings). The behaviors of these two bridges are compared with each other through several field tests including the ambient vibration test, the force vibration test induced by shakers, and the free vibration test induced by push and fast release devices. During the period of this construction, the East and West bridges were strongly damaged by Chi-Chi and Chi-I earthquakes and had been retrofitted. The damage changed the natural frequencies of the bridges, which was explored from the ambient vibration test. The models of the two bridges are simulated by finite element method according to the original design and the soil-structure interaction was put into consideration in the models. Simulations were modified based on the results of the every test in the field. The dynamic parameters of the bridges are identified and compared with those from the theoretical simulation. The efficiency of isolated bridge is observed and verified.
机译：狮头河大桥是一座平行的双子桥。东桥的设计和建造是传统的预应力混凝土箱形桥（盆式轴承）；西桥则使用了隔震装置（带铅橡胶轴承）。通过几个现场测试将这两个桥的性能进行了比较，包括环境振动测试，振动器引起的力振动测试以及推动和快速释放装置引起的自由振动测试。在此施工期间，东西方桥梁受到Chi-Chi和Chi-I地震的严重破坏，并进行了翻新。损坏改变了桥梁的固有频率，这是从环境振动测试中发现的。根据原始设计，通过有限元方法对两座桥梁的模型进行了仿真，并在模型中考虑了土与结构的相互作用。根据现场每个测试的结果修改了仿真。识别桥梁的动态参数，并将其与理论仿真中的参数进行比较。观察并验证了隔离桥的效率。

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