ZHAI Y F, SONG Z Y TIAN Z F, et al.Study on the influencing factors of the dynamic response of underground structures based on a viscoelastic-plastic model[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(1):170-178.

doi:10.16186/j.cnki.1673-9787.2024010018

Received:2024/01/04

Revised:2024/03/21

Published:2025-12-03

Study on the influencing factors of the dynamic response of underground structures based on a viscoelastic-plastic model

Zhai Yafei1,2, Song Zhiyu1,2, Tian Zhifeng1,2,3, Jin Junchao1,2, Liu Guangkun1,2

1.Yellow River Engineering Consulting Co.， Ltd.， Zhengzhou  450003， Henan， China；2.Key Laboratory of Water Management and Water Security for Yellow River Basin of Ministry of Water Resources （Under Construction）， Zhengzhou  450003， Henan， China；3.State Key Laboratory of Coastal and Offshore Engineering， Dalian University of Technology， Dalian  116024， Liaoning， China

Abstract: Objectives Under strong seismic excitation， soil often exhibits pronounced nonlinear dynamic characteristics， which can exacerbate damage to embedded structures. Methods To investigate the seismic input method that accounts for the nonlinear behavior of layered soils and the influencing factors affecting the dynamic response of underground structures， a modeling approach was developed to simulate seismic motions in layered soils. This approach enables iterative updating of material parameters at various soil depths， thereby reflecting the spatial distribution characteristics of real soil properties. For the dynamic analysis of soil-structure systems， an equivalent linear soil model was nested within the Mohr-Coulomb model to establish a viscoelastic-plastic model. A complete seismic response analysis procedure for a layered soil-structure system considering soil nonlinearity was proposed. Using a specific engineering case， a nonlinear seismic response analysis was conducted to examine the effects of burial depth and soil parameters on the seismic performance of underground structures. Results The results indicate that， under combined static and dynamic loads， the relative displacement difference between the top and bottom of the structure decreases with increasing burial depth. Under identical burial conditions， dynamic bending moments induced by seismic loading contribute more significantly to the overall structural response than shear forces. Moreover， when the surface acceleration time history remains constant， the internal force response of the structure decreases as the soil shear modulus increases. Conclusions For double-layer underground structures， seismic actions cause greater shear and bending moment responses in the upper-layer central columns， which should be carefully considered in seismic design. In soft-soil environments， attention should be paid to the dynamic bending moment response， and effective reinforcement measures should be implemented.

Key words:layered foundation;seismic input;nonlinear;underground structure;burial depth;soil parameter