Abstract：In order to improve the seismic capability of continuous rigid frame bridge, a new continuous rigid frame bridge system was proposed with fusing mechanism by adding a pair of reinforced concrete elements (called the "fuse") at the end of the bridge pier in cross-bridge.Research conclusions:(1)By comparison of the seismic demand and bridge pier damage of the new structure system and the traditional structure under low-lever earthquake, design earthquake and high-lever earthquake, it was found that the new structure system had good seismic performance. (2) By studying the destruction of concrete and hysteresis curve of steel bar of the "fuse", it was illustrated that after the "fuse" failure occurred under strong earthquake, the energy dissipation and the rocking of piers could reduce the input of the energy. The fusing mechanism can protect the bridge from almost no damage under the low-lever earthquake, and put the extent of damage and damage range to a minimum under design earthquake and high-lever earthquake. (3) The research results have a good guide for improving the seismic performance of bridges under strong earthquake.
[1] 刘坤. 新疆伊犁河大桥主桥地震响应分析[J]. 铁道工程学报, 2012(6):59-64. Liu Kun. Analysis of Seismic Response of Main Bridge of Yili River Bridge[J]. Journal of Railway Engineering Society, 2012(6):59-64. [2] 周颖,吕西林.摇摆结构及自复位结构研究综述[J].建筑结构学报, 2011(9):1-10. Zhou Ying, Lv Xilin. State-of-the-art on Rocking and Self-centering Structures[J]. Journal of Building Structures, 2011(9):1-10. [3] HOUSNER G W. The Behavior of Inverted Pendulum Structures During Earthquakes[J]. Bulletin of the Seismological Society of America, 1963(2):403-417. [4] HUKELBRIDGE A A, Clough R W. Preliminary Experimental Study of Seismic Uplift of a Steel Frame[R]. Report No.UCB/EERC-77 /22. Berkely: University of California, Berkely, 1977. [5] HUKELBRIDGE A A. Earthquake Simulation Tests of a Nine Story Steel Frame with Columns Allowed to Uplift[R]. Report No.UCB/EERC-77 /23. Berkely: University of California, Berkely, 1977. [6] PRIESTLEY M J N, Evison R J, Carr A J. Seismic Response of Structures Free to Rock on Their Foundations[J]. Bulletin of the New Zealand National Society for Earthquake Engineering, 1978(3):141-150. [7] MANDER J B, Cheng C T. Seismic Resistance of Bridge Piers Based on Damage Avoidance Based on Damage Avoidance Design[R]. Technical Report NCEER, 97-0014, Buffalo, NY: NCREE, 1997. [8] CHENG C T. New Paradigms for the Seismic Design and Retrofit of The Bridge Piers[D]. Buffalo: State University of New York at Buffalo, 1997. [9] 郑锦铜, 江铭鸿. 刚性基础上摇晃桥柱系统地震反应研究[J]. 湖南大学学报(自然科学版),2013(4): 32-41. Zheng Jintong,Jiang Minghong. Eismic Response of Rocking Pier System on Rigid Foundation[J]. Journal of Hunan University(Natural Sciences), 2013(4):32-41. [10]HAO H, Daube M. Numerical Study of Rocking Pier in Mitigating Bridge Responses to Earthquake Ground Motions[C]. Tweed Heads, Gold Coast: Australian Earthquake Engineering Society 2012 Conference, 2012.
2014, Vol. 31 
版权所有 © 2014 《铁道工程学报》编辑部