Structural Engineering and Mechanics

  • 제50권1호
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  • Pages.89-103
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  • 2014
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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Experimental study on the compressive stress dependency of full scale low hardness lead rubber bearing

  • 투고 : 2013.03.18
  • 심사 : 2014.02.15
  • 발행 : 2014.04.10
⟨ 이전 논문 다음 논문 ⟩

초록

According to experimental studies made so far, design formula of shear characteristics suggested by ISO 22762 and JEAG 4614, representative design code for Lead Rubber Bearing(LRB) shows dependence caused by changes in compressive stress. Especially, in the case of atypical special structure, such as a nuclear power structure, placement of seismic isolation bearing is more limited compared to that of existing structures and design compressive stress is various in sizes. As a result, there is a difference between design factor and real behavior with regards to shear characteristics of base isolation device, depending on compressive stress. In this study, a full-scale low hardness device of LRB, representative base isolation device was manufactured, analyzed, and then evaluated through an experiment on shear characteristics related to various compressive stresses. With design compressive stress of the full-scale LRB (13MPa) being a basis, changes in shear characteristics were analyzed for compressive stress of 5 MPa, 10 MPa, 13 MPa, 15 MPa, and 20 MPa based on characteristics test specified by ISO 22762:2010 and based on the test result, a regression analysis was made to offer an empirical formula. With application of proposed design formula which reflected the existing design formula and empirical formula, trend of horizontal characteristics was analyzed.

키워드

참고문헌

  1. Chung, G.Y., Ha, D.H., Park, K.N. and Kwon, H.O. (2002), "Experimental study on characteristics of low hardness rubber bearing", J. Earthq. Eng. Soc. Korea, 6(4), 39-49. https://doi.org/10.5000/EESK.2002.6.4.039
  2. Chung, G.Y., Ha, D.H., Park, K.N. and Kim, D.H. (2002), "Experimental study on characteristics of LRB with low hardness rubber", KSCE J. Civil Eng., 22(6), 1295-1307.
  3. Feng, D.M., Miyama, T., Masuda, K., Liu, W.G., Zhou, F.L. and Zheng, B.H. (2000), "A detailed experimental study on Chinese lead rubber bearing", Proceedings of the 12th World Conference on Earthquake Engineering, 202.
  4. Jang, K.S., Park, J.Y., Park, K.N. and Lee, H.P. (2012), "An experimental study on the dependency of shear strain and compressive stress for the full scale lead rubber bearing", Proceeding of the 2nd International Conference on Computational Design in Engineering, 124.
  5. Japan Electric Association (2000), Technical Guidelines on Seismic Base Isolation System for Structural Safety and Design of Nuclear Power Plants, JEAG 4614-2000, Japan.
  6. JIS K 6410-1 (2011), Elastomeric seismic-protection isolators for buildings - Part 1: Specifications, Japan.
  7. Kelly, J.M. and Konstantinidis, D.A. (2011) Mechanics of Rubber Bearings for Seismic and Vibration Isolation, John Wiley & Sons, NY.
  8. Lee, H.P., Cho, M.S., Park, J.Y. and Jang, K.S. (2013), "An experimental study on the repeated shear performance of Full-Scale LRB", Adv. Struct. Eng. Mech., 3797-3801.
  9. Park, J.Y., Jang, K.S., Lee, H.P., Lee, Y.H. and Kim, H.C. (2012), "Experimental Study on the Temperature Dependency of Full Scale Low Hardness Lead Rubber Bearing", COSEIK J. Comput. Struct. Eng., 25(6), 533-540. https://doi.org/10.7734/COSEIK.2012.25.6.533
  10. ISO 22762-1 (2010), Elastomeric Seismic Protection Isolations Part 1: Test methods, 2nd Edition, Genova.
  11. ISO 22762-3 (2010), Elastomeric Seismic Protection Isolations Part 3: Applications for buildings -Specifications, 2nd Edition, Genova.

피인용 문헌

  1. Theoretical tensile model and cracking performance analysis of laminated rubber bearings under tensile loading vol.52, pp.1, 2014, https://doi.org/10.12989/sem.2014.52.1.075
  2. Investigation of rotation and shear behaviours of complex steel spherical hinged bearings subject to axial tensile load vol.73, pp.2, 2020, https://doi.org/10.12989/sem.2020.73.2.123