多层交通荷载下非对称一体化地下结构的动力响应

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Abstract The dynamic response of underground structures under traffic loads has a significant impact on their safety and stability during operation. In order to investigate the dynamic response characteristics of the asymmetric integrated underground structure with large cross-section under the action of multi-layer traffic loads, this paper establishes a finite element model based on a typical cross-section of a project, simulates the application of traffic loads on road surface, municipal layer and railway layer, analyzes the vibration response and stress distribution characteristics of the asymmetric integrated underground structures, and explores the superposition law of structural dynamic response generated by the joint action of multi-layer traffic loads. The results show that the vibration response of the asymmetric integrated structure is the highest in the middle of the left top plate of the municipal transportation layer, reaching 0.5~0.7m/s2, and the dynamic stress is the highest at the bottom corner of the rail transportation layer, reaching 0.08~0.1MPa. The subway train load is the main source of the dynamic stress of the structure, but the soil nail support and pile foundation support can effectively reduce the effect of the dynamic stress. The vibration response of the integrated structure is significantly affected by the vehicle load on the ground. During the operation period, special attention should be paid to structures located in densely populated road sections with ground vehicles. The research results can provide reference for optimization design and maintenance of underground asymmetric integrated structures during operation.

Key words： Asymmetric underground structure Multilayer traffic load Vibration response Dynamic stress Performance of the structure

Received: 04 July 2023 Published: 28 April 2024

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	Articles by authors
	QIAN Jinsong1
	CHEN Zheng1
	OUYANG Wei1
	2
	LIU Haiyang1
	ZHOU Yiheng1

Cite this article:

QIAN Jinsong1,CHEN Zheng1,OUYANG Wei1, et al. Dynamic response of asymmetric integrated underground structures under multilayer traffic loads[J]. JOURNAL OF VIBRATION AND SHOCK, 2024, 43(8): 178-185.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2024/V43/I8/178

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