Structural Engineering and Mechanics

  • 제42권1호
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  • Pages.73-93
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  • 2012
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Effect of compressible membrane's nonlinear stress-strain behavior on spiral case structure

  • Zhang, Qi-Ling (Changjiang River Scientific Research Institute) ;
  • Wu, He-Gao (State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University)
  • 투고 : 2011.10.14
  • 심사 : 2012.02.28
  • 발행 : 2012.04.10
⟨ 이전 논문 다음 논문 ⟩

초록

With an active structural involvement in spiral case structure (SCS) that is always the design and research focus of hydroelectric power plant (HPP), the compressible membrane sandwiched between steel spiral case and surrounding reinforced concrete was often assumed to be linear elastic material in conventional design analysis of SCS. Unfortunately considerable previous studies have proved that the foam material serving as membrane exhibits essentially nonlinear mechanical behavior. In order to clarify the effect of membrane (foam) material's nonlinear stress-strain behavior on SCS, this work performed a case study on SCS with a compressible membrane using the ABAQUS code after a sound calibration of the employed constitutive model describing foam material. In view of the successful capture of fitted stress-strain curve of test by the FEM program, we recommend an application and dissemination of the simulation technique employed in this work for membrane material description to structural designers of SCS. Even more important, the case study argues that taking into account the nonlinear stress-strain response of membrane material in loading process is definitely essential. However, we hold it unnecessary to consider the membrane material's hysteresis and additionally, employment of nonlinear elastic model for membrane material description is adequate to the structural design of SCS. Understanding and accepting these concepts will help to analyze and predict the structural performance of SCS more accurately in design effort.

키워드

참고문헌

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피인용 문헌

  1. Using softened contact relationship describing compressible membrane in FEA of spiral case structure vol.13, pp.4, 2013, https://doi.org/10.1016/j.acme.2013.04.009
  2. Embedment of steel spiral cases in concrete: China's experience vol.72, 2017, https://doi.org/10.1016/j.rser.2016.10.048
  3. Bearing mechanism of composite structure with reinforced concrete and steel liner: An application in penstock vol.141, 2017, https://doi.org/10.1016/j.engstruct.2017.03.021
  4. Numerical modeling of preloaded filling spiral case structure vol.15, pp.8, 2018, https://doi.org/10.1590/1679-78255048
  5. Compression-Resilience Responses of Commonly Used Membrane Materials in Spiral Case Structures of Hydroelectric Power Plants: Experimental Investigation vol.30, pp.6, 2018, https://doi.org/10.1061/(ASCE)MT.1943-5533.0002284