Compartmental particle damper and its experimental investigation in seismic control of immersed tunnel

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (17) : 7-12.

YAN Wei-ming1，XIE Zhi-qiang1, ZHANG Xiang-dong2, WANG Jin1，GAO Xiao-long1

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Abstract

Based on the modified design theory of TLD，a preliminary design method of compartmental particle damper for immersed tunnel was presented. A 1/10-scale model tunnel based on a immersed tunnel was designed. The shaking table test of immersed tunnel with and without particle dampers was conducted .The results showed that seismic control of particle damper for the longitudinal immersed tunnel has better effect; a particle damper can effectively reduce dynamic response which is about joint axial force and relative displacement and so on, while the major factors influencing its damping effect are the accumulation of particles and better ratio of added mass and spectrum characterization of excitation and amplitude of excitation. Particle damper system have good performance in reducing the longitudinal fundamental frequency to immersed tunnel, however, the ratio of added mass and the accumulation of particles are principal factor for tuning fundamental frequency of the primary structure. The amplitude of transfer function can express level of modal response, therefore, the method ascertaining better ratio of added mass was presented by decreased degree of modal response, and then it realized effective control to lower vibration modes of primary structure.

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compartmental particle damper / immersed tunnel / shaking table test / seismic control

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YAN Wei-ming1，XIE Zhi-qiang1, ZHANG Xiang-dong2, WANG Jin1，GAO Xiao-long1. Compartmental particle damper and its experimental investigation in seismic control of immersed tunnel[J]. Journal of Vibration and Shock, 2016, 35(17): 7-12

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