中文摘要：

本文以两跨钢-混凝土连续组合梁模型和刚架拱桥的环境振动测试为基础，分析了环境温度变化对桥梁动力特性的影响。结果表明：环境温度变化会引起桥梁动力特性的显著变化，同时温度变化对结构动力特性的影响受到桥梁边界约束条件的很大影响，此类测试和分析对桥梁健康监测与损伤识别具有借鉴意义。

英文摘要：

Based on the ambient vibration testing, effects of environmental temperature on the vibration characteristics of a rigid frame arch bridge and a two-span continuous composite beam were conducted. The testing results indicate that the changes of environmental temperature cause great variation of bridge vibration characteristics. It can also be found that the restrictions of boundary condition may affect bridge dynamic characteristics extensively when the environmental temperature changes. The testing and anlysis can be used for bridge health monitoring and structural damage identification.