Vertical Stiffness and Deformation Analysis Models of Rubber Isolators in Compression and Compression-Shear States
Publication: Journal of Engineering Mechanics
Volume 135, Issue 9
Abstract
The vertical stiffness and deformation theories of rubber isolators in compression and compression-shear states are systemically researched in the paper, a series of basic concepts, such as origin compression stiffness, origin compression longitudinal elastic modulus, offset vertical stiffness, etc. are suggested with corresponding theoretical formula and experimental estimation method. Based on the basic concepts and newly suggested calculating theories, the deformation calculating theory related to pure compression state and compression-shear state of isolating bearing is established. The vertical stiffness, offset vertical stiffness and deformation tests are performed with nature rubber bearings and lead plug rubber bearings total 16 original specimens to verify the new concepts and computation model of rubber isolators. All test results show that the theories established in the paper are suitable for analyzing the vertical stiffness and deformation of rubber isolators.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This work was supported in part by National Nature Science Foundation of China (Grant No. UNSPECIFIED50578045) and Science and Technology Commission of Guangdong (Grant No. UNSPECIFIED2006B37201002). Their support is gratefully acknowledged by the writers.
References
Architectural Institute of Japan. (2001). “Recommendation for the design of base isolated building.” Marozen Corporation, Tokyo.
Fujimoto, K., and Tezuka, S. (1986). “The bulk modulus and Poisson ratio of rubber.” J. Soc. Rubber Industry, Japan, 59(7), 285–398
Fujita, T., et al. (1987). “Experimental study of laminated rubber bearings for earthquake isolation of buildings: 2nd report, static tests for rubber bearings of 980 kN rated load.” Trans. Japan Soc. Mechanical Engineers C, 53(485), 77–81.
Gent, A. N., Henry, R. I., and Roxbury, M. L. (1974). “Interfacial stresses for bonded rubber blocks in compression and shear.” J. Appl. Mech., 15(12), 855–859.
Iizuka, M. (1994). “Mechanical properties research of rubber isolators under high vertical load.” Proc., 9th Earthquake Engineering Symp. of Japan, Tokyo, 1759–1764.
Koh, C. G., and Kelly, J. M. (1988). “A simple mechanical model for elastomeric bearings used in the isolation.” Int. J. Mech. Sci., 30(12), 933–943.
Lindley, P. B. (1981). “Natural rubber structural bearings.” Joint Sealing and Bearing System for Concrete Structures, 1(2), 353–378.
Liu, W. (2003). “Mechanics properties of rubber bearings and earthquake response analysis of isolated structures.” Ph.D. dissertation, Beijing Univ. of Technology, Beijing.
Liu, W., Miyama, T., and Feng, D. (2001). “A simply method for computing the vertical stiffness of rubber bearings.” Earthquake Eng. Eng. Vib., 21(4), 111–116.
Nakanishi, R., Uryu, M., and Yamazaki, T. (2005). “Study on basic properties of natural rubber bearings. Part 1—The stress distribution under low vertical load; and Part 2—Mechanical properties under low and high vertical load.” Summaries of technical papers of annual meeting Architectural Institute of Japan, B-2, 757–760.
Robinson, W. H., and Tuker, A. G. (1983). “Test results for lead-rubber bearings for the William M. Clayton building, Toe Toe Bridge, and Waiotukupuna Bridge.” New Zealand Nat. Soc. Earthquake Eng. Bull, 14(1), 21–33.
Skinner, R. I., Robinson, W. H., and Mcverry, G. H. (1993). An introduction to seismic isolation, Wiley, New York.
Society of Rubber Industry of Japan. (2000). Handbook of rubber bearings for isolation, Rikon Tosho, Tokyo, 127–140.
Takayama, M., Morita, K., and Tada, H. (1996). “Ultimate load capacity of natural rubber bearings.” J. Struct. Constr. Eng., 482, 43–51.
Uryu, M., and Nishikawa, T. (1999). “Study on stiffness, deformation, and ultimate characteristics of base-isolated rubber bearings: Horizontal and vertical characteristics under shear deformation.” J. Struct. Constr. Eng., 479, 119–128.
Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 135 • Issue 9 • September 2009
Pages: 945 - 952
Copyright
© 2009 ASCE.
History
Received: Feb 20, 2008
Accepted: Nov 17, 2008
Published online: Aug 14, 2009
Published in print: Sep 2009
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.