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Arabian Journal for Science and Engineering

, Volume 44, Issue 5, pp 4119–4129 | Cite as

Study on the Failure Characteristics of Concrete Specimen Under Confining Pressure

  • Chaojie WangEmail author
  • Shengqiang YangEmail author
  • Xiaowei Li
  • Chenglin Jiang
  • Mengkun Li
Research Article - Civil Engineering
  • 76 Downloads

Abstract

The fracture patterns of brittle materials in different stress loading modes are different. In order to study the fracture characteristics of brittle materials under confining pressure, in this study, both uniaxial compression tests and loading confining pressure tests were conducted on three concrete samples of different strengths, respectively. Meanwhile, the failure process of the samples during the loading of confining pressure was monitored using an acoustic wave tester; finally, the failure characteristics of the concrete samples were further investigated on a mesoscopic level by carrying out numerical simulations. The test results show that different failure modes were revealed in the concrete samples subjected to uniaxial compression: The failure initially started at both ends and then gradually extended to the middle part along the longitudinal direction; eventually, splitting failure, single inclined plane shear failure and conjugated inclined plane shear failure occurred. However, as the confining pressure was loaded, the samples failed merely in a simple mode, that is, the fractures occurred around the middle parts of the samples, perpendicular to the specimens axis. According to the acoustic measurements, the local failure processes before fracturing under confining pressure were consistent with those under uniaxial compression. The simulation results suggest that the failure initially started inside the samples due to the effects of longitudinal tensile stress under confining pressure, and then, it gradually extended to both sides along the lateral direction.

Keywords

Tensile stress Damage Dynamic disaster FLAC Ultrasonic wave 

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Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  1. 1.Key Laboratory of Gas and Fire Control for Coal Mines, Ministry of EducationChina University of Mining and TechnologyJiangsuChina
  2. 2.School of Safety EngineeringChina University of Mining and TechnologyJiangsuChina

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