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This study investigates effects of traffic-induced vibration on historic structures by field measurements. Attenuation rates of ground acceleration propagated from its source at different locations having different geotechnical properties were determined from vibration measurement. The attenuation rate was considered as a ratio of the amplitudes between two sensors and the distance between them. The results of the attenuation rate were dependent on soil property in term of an average shear wave velocity. The attenuation rate in Phra Nakhon Sri Ayutthaya was higher than in other studied area due to stiffer soils underneath. The highest vibration velocity found in Phra Nakhon Sri Ayutthaya, under more extreme condition than the condition at historic sites, was lower than the recommendation provided in an international standard of vibration effect on structure and past researches.
Keywords: traffic induced vibration; vibration measurement; attenuation of vibration; historic structure; Ayutthaya
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