Experimental Study on Subway-Induced Vibration of Over-Track Frame-Core Tube Structure in a Metro Depot
With the increasing shortage of urban land resources,over-track buildings in metro depots have become favored by many real estate developers.However,due to the special location,the vibrations generated by the operation of the subway produces a negetive impact on the comfort of over-track buildings,which has a certain affect on the life and work of residents.Therefore,it is necessary to analyze the subway induced vibrations in over-track buildings.In this study,a frame-core-tube structure office building in Shanghai Xujing Depot is selected for a filed test on vibration response,and the vibration acceleration and frequency spectrum of different floors in the structure were analyzed,and the vertical vibration of different floors was evaluated by using Z vibration level and one-third octave.The results showed that with the increase in floor height,the acceleration showed an overall attenuation trend,while the low-frequency vibration component of 4 to 8 Hz increased.Amplification occurred in higher floors,and the vertical acceleration amplification was more obvious than that in the horizontal direction.The Z vibration level of the higher floors also showed an amplification trend,and the Z vibration level of the 18th floor is greater than the 1st floor in most conditions.Besides,the one-third octave in the 13th and 18th floors exceeded or was near to the limit value of 4 Hz,while it didn't exceed the limit on other floors of this building.Attention should be paid to the vibration of the higher floors to improve comfort during design.The results can provide data support for the development and design of over-track frame-core-tube structures.
国家科技期刊平台
NSTL
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