Work

Evolution of the Damping Ratio Considering Cyclic Confining Pressure Under Intermittent Cyclic Loading

Year: 2025

Type: article

Abstract: The damping ratio is essential to conducting dynamic analysis for underground engineering under traffic loading. Variations in the damping ratio are usually studied using cyclic triaxial tests with continuous cyclic loading; however, intermittent loading is observed under traffic loading. Moreover, both the deviator stress and confining pressure vary cyclically. So far, the development of the damping ratio under intermittent cyclic loading with cyclic confining pressure has rarely been studied. Thus, cyclic triaxial tests with continuous and intermittent cyclic loading were conducted. Unlike continuous loading, where the normalized damping ratio progressively decreases, the corresponding variations under intermittent cyclic loading showed a sudden increase in the initial damping ratio at each restart. Critically, the cyclic confining pressure significantly reduced the normalized damping ratio, with greater attenuation under intermittent loading at higher cyclic confining pressures. In addition, an empirical model incorporating these effects for the damping ratio under intermittent cyclic loading was developed.

Source: Buildings

DOI: 10.3390/buildings15162882

Authors: Juehao Huang, Chao Meng, Yongqiang Zhou, Jian Chen, Xiaodong Fu, Mingyi Wang

Institutions: Chinese Academy of Sciences, Institute of Rock and Soil Mechanics, State Key Laboratory of Geomechanics and Geotechnical Engineering, Chang'an University

Language: English

Topic: Geotechnical Engineering and Soil Mechanics

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $3,137