A large model box was developed in our experiment to study the vibration reduction effect.Five hydraulic high-performance actuators are arranged in the upper part of the model box.There is a time difference between adjacent actuators,which can simulate the train induced vibration.To reduce vibration a composite barrier is designed;the barrier consists of a honeycomb concrete canvas and PE polymer water bags.The concrete canvas can be mixed with water to produce a hydration reaction to form a structure with a certain hardness.By simulating different train speeds and loads,vertical vibration velocity,and acceleration before and after the barrier are compared and analyzed.The experimental results show that the new barrier can achieve a good vibration reduction effect.When the simulated train speed increases,the damping effect of the barrier is improved.At a speed of 180 km/h,an amplitude of 1.5 m after the barrier is found to be 48.6％lower than that before the barrier.Velocity decreases by 24.2％at 36 km/h and by 38.1％at 108 km/h.

Ding Guangya;Shen Chenli;Wang Jun;Wu Ming

College of Civil Engineering and Architecture,Wenzhou University,Wenzhou 325035,China;School of Geological Engineering and Surveying,Chang'an University,Xi'an 710054,China

地震工程与工程振动（英文版）

[1]Ding Guangya;Shen Chenli;Wang Jun;Wu Ming-.Vibration reduction analysis of new barriers in large model experiment)[J].地震工程与工程振动（英文版）,2022(03):741-751

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