[1] Liu Wenjing, Li Li, Ye Kun,. Application of LRB isolation technology in continuous girder bridges [J]. Journal of Southeast University (English Edition), 2011, 27 (2): 196-200. [doi:10.3969/j.issn.1003-7985.2011.02.017]
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Application of LRB isolation technology in continuous girder bridges(
)
)Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]
- Volumn:
- 27
- Issue:
- 2011 2
- Page:
- 196-200
- Research Field:
- Civil Engineering
- Publishing date:
- 2011-06-30
Info
- Title:
- Application of LRB isolation technology in continuous girder bridges
- Author(s):
- Liu Wenjing; Li Li; Ye Kun
- School of Civil Engineering and Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China
Hubei Key Laboratory of Control Structure, Huazhong University of Science and Technology, Wuhan 430074, China
- PACS:
- TU352.12
- DOI:
- 10.3969/j.issn.1003-7985.2011.02.017
- Abstract:
- This paper summarizes the superiority of lead-rubber bearing(LRB)continuous girder bridges. The research method for isolation performance is discussed when pile-soil interaction is considered. By the finite element method and self-compiling program, a systematic study of the reliability of LRB continuous girder bridges is given by the use of different indicators, including the riding comfort of the LRB system, the pounding and dynamic stability when the LRB system is subjected to seismic excitations, and the reliability of the LRB system when subjected to other common horizontal loads. The results show that the LRB system has obvious advantages over the traditional continuous girder structure. The LRB isolation effect remains good even when pile-soil interaction is considered; the vertical rigidity of the LRB guarantees desirable riding comfort. The LRB demonstrates good reliability when subjected to the effects of braking, wind loads and temperature. However, it is also pointed out that the pounding of the LRB system subjected to earthquakes must be avoided, and the dynamic stability may be reduced when the LRB system has higher piers and generates a larger displacement in a strong earthquake. Useful advice and guidance are proposed for engineering application.
References:
[1] Naeim F, Kelly J M. Design of seismic isolated structures: From theory to practice [M]. New York: John Wiley and Sons Inc, 1999:6-8.
[2] Skinner R I, Robinson W H, McVerry G H. An introduction to seismic isolation [M]. New York: John Wiley and Sons Inc, 1993:3-7.
[3] Tang J X, Liu Z H. Base isolation for buildings [M]. Wuhan: Huazhong University of Science and Technology Press, 1993:18-19.(in Chinese)
[4] Yu Y B. Three-dimensional dynamic analysis of isolation bridge and dynamic testing [D]. Xi’an: Chang’an University, 2004.(in Chinese)
[5] Ghobarah A, Ali J M. Seismic performance of highway bridges [J]. Engineering Structure, 1998, 10(1): 157-166.
[6] Pagini L C, Solari G. Stochastic analysis of the linear equivalent response of bridge piers with aseismic device [J]. Journal of Structural Engineering and Structural Dynamic, 1999, 28(5): 543-560.
[7] Wan S. Response of isolated bridge subjected to near-fault ground motions recorded in chi-chi earthquake [C]//Proceedings of International Workshop on Annual Commemoration of Chi-Chi Earthquake. Taipei, China, 1999:371-380.
[8] Chongqing Communications Research and Design Institute Co., Ltd. JTG/T B02-01—2008 Guidelines for seismic design of highway bridges [S]. Beijing: China Communications Press, 2008.(in Chinese)
[9] Liu J, Liu Q, Zhu Z W. The equivalent dynamic rigidity calculation and simulation of the pile foundations of the main pier of Liulin Bridge [J]. Shanxi Architecture, 2009, 34(20): 7-8.(in Chinese)
[10] China Communications Construction Highway Consultants Co., Ltd. JTG D63—2007 Code for design of ground base and foundation of highway bridges and culverts [S]. Beijing: China Communications Press, 2007.(in Chinese)
[11] Long X H, Li L. Time-history analysis of pile-soil isolated continuous girder bridge [J]. China Municipal Engineering, 2006, 121(3): 20-23.(in Chinese)
[12] Liu Y H, Zhao X J, Wang K C. An analysis of effect of soil-structure interaction upon bridge of seismic reduction with LRB [J]. Journal of Xi’an University of Technology, 2003, 19(1): 13-17.(in Chinese)
[13] Chatterjee P K, Dattatk, Surana C S. Vibration of continuous bridges under moving vehicles [J]. Journal of Sound and Vibration, 1994, 165(5): 619-634.
[14] Li L, Ye Z X, Wang X. Riding comfort of long-span suspension bridge under moving load [J]. Journal of Highway and Transportation Research and Development, 2007, 24(9): 46-50.(in Chinese)
[15] Li Z X, Yue F Q. State of arts of study on seismic pounding responses of urban bridges. [J]. Earthquake Engineering and Engineering Vibration, 2005, 25(4): 91-98.(in Chinese)
[16] Wang D S, Feng Q M, Wang G X. Analysis model of pounding between adjacent bridge girders during earthquakes based on collinear impact between rods [J]. Engineering Mechanics, 2004, 21(2): 157-166.(in Chinese)
[17] Jankowski R, Wilde K, Fujino Y. Reduction of pounding effects in elevated bridges during earthquakes [J]. Earthquake Engineering, 2000, 29(2): 195-212.
[18] Li L, Ye Z X, Wu J. Analysis on seismic pounding responses of isolated continuous girder bridge under earthquake excitation [J]. Journal of Highway and Transportation Research and Development, 2009, 26(7): 100-104.(in Chinese)
[19] Li L, Zhang H, Long X H. Investigation on elastic dynamic stability of long-span continuous rigid frame bridge with high-piers induced by earthquake [J]. Earthquake Resistant Engineering and Retrofitting, 2008, 30(6): 84-88.(in Chinese)
[20] China Communications Construction Highway Consultants and Design Institute. JTG D60—2004 General code for design of highway bridges and culverts [S]. Beijing: China Communications Press, 2004.(in Chinese)
Memo
- Memo:
-
Biographies: Liu Wenjing(1983—), female, graduate; Li Li(corresponding author), female, professor, lili2431@163.com.
Foundation item: The National Natural Science Foundation of China(No.51008134).
Citation: Liu Wenjing, Li Li, Ye Kun.Application of LRB isolation technology in continuous girder bridges[J].Journal of Southeast University(English Edition), 2011, 27(2):196-200.[doi:10.3969/j.issn.1003-7985.2011.02.017]