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<p>Debonding at the concrete–rubber interface, driven by air leakage, is recognized as a primary factor contributing to the failure of the rubber sealing layer in compressed air energy storage (CAES) caverns. However, the mechanism of air-driven debonding at the concrete–rubber interface in CAES caverns remains poorly understood. This study investigates the debonding mechanism using experimental testing and numerical simulation methods. The cohesive performance of the interface is evaluated through a three-point bending test. Based on the experimental results, the cohesive element parameters in ABAQUS software are used to accurately describe interface debonding behavior. Additionally, a three-dimensional numerical model is developed to simulate air-driven debonding using the coupled pore pressure cohesive zone method. The study analyzes the debonding process, seepage behavior, and structural stress distribution in the cavern structure. Furthermore, the effects of air temperature and pressure inside the CAES cavern on interface debonding are examined. The interface pressure at the leakage point fluctuates significantly during the debonding process, primarily influenced by the debonding area and height. As air leakage progresses, both the debonding range and debonding height at the interface continue to increase. In addition, air leakage significantly affects pore pressure and structural stress distribution in the cavern structural layer. Higher air pressure leads to an increase in both fracture breakdown pressure (FBP) and debonding range, whereas higher temperatures exhibit the opposite trend, reducing both FBP and debonding extent.</p><p>Highlights<UnorderedList Mark="Bullet"> <ItemContent> <p>The mechanism of air-driven debonding at the concrete–rubber interface in CAES caverns is revealed.</p> </ItemContent> <ItemContent> <p>A three-dimensional numerical model is developed to simulate air-driven interfacial debonding.</p> </ItemContent> <ItemContent> <p>The coupled pore pressure cohesive zone method is employed to characterize debonding behavior.</p> </ItemContent> <ItemContent> <p>The effect of air temperature and pressure on interfacial debonding was quantified.</p> </ItemContent> </UnorderedList></p>

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Debonding Failure of the Rubber Sealing Layer–Concrete Lining Interface in Lined Rock Caverns for Compressed Air Energy Storage

  • 期刊论文

  • 发表日期：

    2026年2月6日

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  • Weiming Liang,
  • Diansen Yang,
  • Peng Li

摘要

Debonding at the concrete–rubber interface, driven by air leakage, is recognized as a primary factor contributing to the failure of the rubber sealing layer in compressed air energy storage (CAES) caverns. However, the mechanism of air-driven debonding at the concrete–rubber interface in CAES caverns remains poorly understood. This study investigates the debonding mechanism using experimental testing and numerical simulation methods. The cohesive performance of the interface is evaluated through a three-point bending test. Based on the experimental results, the cohesive element parameters in ABAQUS software are used to accurately describe interface debonding behavior. Additionally, a three-dimensional numerical model is developed to simulate air-driven debonding using the coupled pore pressure cohesive zone method. The study analyzes the debonding process, seepage behavior, and structural stress distribution in the cavern structure. Furthermore, the effects of air temperature and pressure inside the CAES cavern on interface debonding are examined. The interface pressure at the leakage point fluctuates significantly during the debonding process, primarily influenced by the debonding area and height. As air leakage progresses, both the debonding range and debonding height at the interface continue to increase. In addition, air leakage significantly affects pore pressure and structural stress distribution in the cavern structural layer. Higher air pressure leads to an increase in both fracture breakdown pressure (FBP) and debonding range, whereas higher temperatures exhibit the opposite trend, reducing both FBP and debonding extent.

Highlights

The mechanism of air-driven debonding at the concrete–rubber interface in CAES caverns is revealed.

A three-dimensional numerical model is developed to simulate air-driven interfacial debonding.

The coupled pore pressure cohesive zone method is employed to characterize debonding behavior.

The effect of air temperature and pressure on interfacial debonding was quantified.