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桥梁动力特性的测试往往是通过其在外部激励下的动力响应,经频谱分析来加以分析测试。环境激励和跑车(或者跳车、刹车)作为外部激励,由于激振的能量不同,跑车主要适用于小跨径,刚度较小的桥梁结构,而对于大跨径桥梁则需要通过环境来进行激励。本文以某桥动载荷载试验测试为背景介绍基于环境激励和跑车激振测试桥梁的动力特性测试。
The testing of dynamic characteristics of bridges is usually through the external excitation of the dynamic response, the spectrum analysis to be tested. Environmental incentives and sports cars (or jumping, braking) as an external incentive, due to the different excitation energy, the sports car is mainly suitable for small span, less rigid bridge structure, and for large span bridges you need to be stimulated by the environment . In this paper, a bridge dynamic load test based on environmental incentives and sports car vibration test bridge dynamic test.