Abstract：Abstract：Research purposes：To restraint the transverse vibration of the deficient bridges, a potential retrofit measure named after-prestressing cables retrofit method for the railway bridge is proposed in this paper. This method does not affect the normal operation of the train, so it can significantly shorten the construction period, reduce the loss of transport, and guarantee the safe operation of the railway lines. In this paper, theory for this method is explained in detail, the influences of various modeling parameters, such as the location of the cable, the initial value for prestressing and the inclination angle of the cable are numerically assessed. Based on the analytical results, some proposal values for the aforementioned parameters are provided for their application to practical problems.
Research conclusions：(1) The more layers of cable arranged, the more first-order frequency of lateral pier increased; cables should be arranged between the top of the pier and top 1/3 in the high range. (2) The force of cables should not be too large, just ensure cables have tension. (3) When the cables angle with the pier body reaches 50 degrees, the first-order frequency of pier reaches the maximum value. In order to facilitate the construction, the cables should be fixed on the ground anchorage system which side existing longer cable. (4) The cables shall be determined by features which associates to the pier in the practical engineering application. (5) The research results can be used for railway bridge piers reinforcement about transverse amplitude.
1］曹兴, 魏洋, 李国芬. 混凝土桥墩加固与修复技术研究［J］. 施工技术, 2011(15):60-64.
Cao Xing, Wei Yang, Li Guofen. Research on the Reinforcement and the Repair Techniques for RC Bridge Piers［J］. Construction Technology, 2011(15):60-40.
［2］范立础, 李建中, 王君杰. 高架桥梁抗震设计［M］. 北京: 人民交通出版社, 2001.
Fan Lichu, Li Jianzhong, Wang Junjie. Elevated Bridge Seismic Design［M］. Beijing: China Communications Press, 2001.
［3］丁亚红，王兴国，王鹏涛，等. 连续纤维在工程结构加固中的应用［J］. 铁道工程学报,2006(2):16-19.
Ding Yahong, Wang Xingguo, Wang Pengtao, etc. Application of Continuous Fiber in Reinforcement of Engineering Structure［J］. Journal of Railway Engineering Society, 2006(2):16-19.
［4］岳清瑞, 李庆伟, 杨勇新，等. 纤维增强复合材料嵌入式加固技术［J］. 工业建筑, 2004(4):1-4.
Qiu Qingrui, Li Qingwei, Yang Yongxin, etc. Technique of Structures Strengthened with Near Surface Mounted FRP［J］. Industrial Construction, 2004(4):1-4.
［5］Hakan Nordin. Fiber Reinforced Polymer in Civil Engineering ［Dissertation］. Department of Civil and Mining Engineering Division of Structural Engineering, 2003.
［6］唐俊, 李飞. 竖向预应力锚索在旧桥墩加固利用中的应用［J］. 探矿工程, 2010(2):62-63.
Tang Jun, Li Fei. Application of Vertical Pre-stressed Cable in Existing Bridge Pier Reinforcement ［J］. Exploration Engineering, 2010(2):62-63.
［7］朱银珠. 体外预应力法加固桥墩［J］. 桥梁建设, 2004(2):66-68.
Zhu Yinzhu. Strengthening of Bridge Piers with External Prestressing Method［J］. Bridge Construction, 2004(2):66-68.
［8］Priestley MJN, Seible F. Design of Seismic Retrofit Measures for Concrete and Masonry Structures ［J］. Construction and Building Materials, 1995(6):365-377.
［9］Chin-Tung Cheng, Jyh Csyang Yang, Yeong-Kae Yeh etc. Seismic Performance of Repaired Hollow-bridge Piers ［J］. Construction and Building Materials, 2003(5):339-351.
［10］路文尚. 阶梯式增大截面积法在铁路桥墩加固中的应用研究［J］. 神华科技, 2013(1):76-79.
Lu Wenshang. Application of Stepped Enlarging Section Method in Railway Bridge Pier Reinforcement ［J］. Shenhua Science and Technology, 2013(1)：76-79.
［11］铁运函［2004］120号，铁路桥梁检定规范［S］.
Rail Transport Letter ［ 2004 ］ No.120，Railway Bridge Test Specification［S］.
［12］任俊超, 张其林, 李虎，等. 空间悬索杂交结构的几何非线性分析［J］. 空间结构, 2006(1):52-54.
Ren Junchao, Zhang Qilin, Li Hu, etc. Geometrically Nonlinear Analysis for Cable Hybrid Structures［J］. Spatial Structures, 2006(1):52-54.
［13］GB/T 18365—2001，斜拉桥热挤聚乙烯高强钢丝拉索技术条件［S］.
GB/T 18365—2001，Technical Conditions for Hot-extruding PE Protection High Strength Wire Cable of Cable-stayed Bridge［S］.
［14］苏善根, 许宏亮. 斜拉桥销铰连接锚固形式的初探［J］. 中国铁道科学, 2003(1):94-98.
版权所有 © 2014 《铁道工程学报》编辑部