Abstract：Research purposes: In order to improve the seismic performance of railway gravity bridge piers with low longitudinal reinforcement ratio, the design method is proposed to locally increase the amount of longitudinal reinforcement at the bottom of the pier. Five model piers with different reinforcement height are made, and the seismic performance of the piers with only increased the longitudinal reinforcement ratio at the bottom of the pier is compared and analyzed through the pseudo-static test. Research conclusions: (1)The calculation method of the height of the longitudinal reinforcement is determined and the calculation formula of the height of the longitudinal reinforcement is deduced. (2)The horizontal bearing capacity and energy dissipation capacity of the pier can be effectively improved by increasing longitudinal reinforcement ratio at the bottom of the pier. (3)The bearing capacity and energy dissipation capacity of the pier with the supplementary longitudinal bars at the bottom are basically the same as that of the pier with the same longitudinal reinforcement ratio at the supplementary place, and the stiffness will not be reduced basically. (4)The results of the pseudo-static test verify the feasibility of enhancing the seismic performance of the pier by increasing the number of longitudinal bars on the bottom of the pier and the rationality of the calculation method of the height of the increased longitudinal reinforcement. (5)The research results can be applied to the design of piers which need to improve the seismic performance.
鲁锦华, 陈兴冲, 丁明波, 马华军. 墩底局部加密纵筋铁路重力式桥墩的试验研究[J]. 铁道工程学报, 2022, 39(5): 39-46.
LU Jinhua, CHEN Xingchong, DING Mingbo, MA Huajun. Experimental Research on the Railway Gravity Bridge Piers with Reinforced Longitudinal Reinforcement at Pier Bottom. Journal of Railway Engineering Society, 2022, 39(5): 39-46.
Aditya Singh Rajput, Umesh Kumar Sharma. Seismic Behavior of Under Confined Square Reinforced Concrete Columns[J]. Structures, 2018(13):26-35.
[2]
李贵乾.钢筋混凝土桥墩抗震性能试验研究及数值分析[D]. 重庆:重庆交通大学,2010.Li Guiqian. Experimental Study and Numerical Analysis on Seismic Performance of Reinforced Concrete Bridge Columns[D]. Chongqing:Chongqing Jiaotong University,2010.
[3]
蒋丽忠,邵光强,姜静静,等.高速铁路圆端形实体桥墩抗震性能试验研究[J].土木工程学报,2013(3):86-95.Jiang Lizhong, Shao Guangqiang, Jiang Jingjing, etc. Experimental Study on Seismic Performance of Solid Piers with Round Ended Cross-section in High-speed Railway[J]. China Civil Engineering Journal,2013(3):86-95.
[4]
鲁锦华,陈兴冲,丁明波,等.少筋混凝土重力式桥墩抗震性能分析[J].铁道科学与工程学报,2019(9):2223-2232.Lu Jinhua, Chen Xingchong, Ding Mingbo, etc. Seismic Performance Analysis of Railway Gravity Piers with Low Longitudinal Reinforcement Ratio[J]. Journal of Railway Science and Engineering, 2019(9):2223-2232.
[5]
鞠彦忠,阎贵平,李永哲.低配筋铁路桥墩抗震性能的试验研究[J].铁道学报,2004(5):91-95.Ju Yanzhong, Yan Guiping, Li Yongzhe. Experimental Study on Seismic Behaviors of Railway Bridge Piers with Low Reinforcement Ratio[J]. Journal of the China Railway Society,2004(5):91-95.
[6]
王东升,郭迅,孙治国,等.汶川大地震公路桥梁震害初步调查[J].地震工程与工程振动,2009(3):84-94.Wang Dongsheng, Guo Xun, Sun Zhiguo, etc. Damage to Highway Bridges during Wenchuan Earthquake[J]. Journal of Earthquake Engineering and Engineering Vibration, 2009(3):84-94.
[7]
Lu Jinhua, Chen Xingchong, Ding Mingbo, etc. Experimental and Numerical Investigation of the Seismic Performance of Railway Piers with Increasing Longitudinal Steel in Plastic Hinge Area[J]. Earthquakes and Structures,2019(6):545-556.
[8]
李佳文,丁明波,鲁锦华,等.塑性铰区纵筋加密的少筋混凝土桥墩振动台试验研究[J].铁道科学与工程学报,2019(7): 1728-1734.Li Jiawen, Ding Mingbo, Lu Jinhua, etc. Shaking Table Test of Reinforced Concrete Pier with Longitudinal Reinforcement Encrypt in Plastic Hinge Area[J]. Journal of Railway Science and Engineering,2019(7): 1728-1734.
2022, Vol. 39 
版权所有 © 2014 《铁道工程学报》编辑部