Journal Published Online: 20 February 2023
Volume 46, Issue 3

Experimental Investigation and Energy Evolution of Brittle Limestone Subjected to Multistage Cyclic Loading

CODEN: GTJODJ

Abstract

In earthquake engineering, dynamic response of rock is a hot topic for investigating rock mechanism characteristics. In this article, limestone collected from the Hongshiyan landslide area induced by the 2014 “8.03” Ludian earthquake in southwest China is used to conduct multi-stage cyclic loading tests. The test results show that as confining pressure, loading frequency, and stress amplitude increase, the dynamic elastic modulus increases gradually. Damping parameters are dependent on confining pressure and can be divided into two evolution modes. Three stages can be obtained based on the residual strain curve, including stable, slow increase, and rapid increase, which correspond to the rock failure process. In addition, energy evolution characteristics are analyzed to express the influence of loading strategies. Dissipated energy gradually accumulates linearly, but stress amplitude and cyclic number promote it.

Author Information

Liu, Shiqi
PowerChina Huadong Engineering Corporation Limited, Hangzhou, Zhejiang, China
Wang, Huanling
Research Institute of Geotechnical Engineering, Hohai University, Nanjing, Jiangsu, China
Qu, Xiao
Research Institute of Geotechnical Engineering, Hohai University, Nanjing, Jiangsu, China
Cheng, Zhichao
PowerChina Huadong Engineering Corporation Limited, Hangzhou, Zhejiang, China
Pages: 25
Price: $25.00
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Details
Stock #: GTJ20220127
ISSN: 0149-6115
DOI: 10.1520/GTJ20220127