本文在总结国内外研究结果的基础上，对绵阳涪江四桥的动力特性和地震反应进行了全面系统的研究。

Based on the research results home and abroad, the dynamic behavior and seismic response of Fujiang IV Bridge are studied systematically in this thesis.

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采用梁、板线性有限元数学模型计算了结构自振特性和地震响应。

Structural free vibration characterization and seismic response were calculated by means of beam-plate linear mathematical model of finite element method.

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大多数物质都具有不同的地震的特性。

Most materials have different seismic properties .

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