摘要To ensure the alignment of free cables in self-anchored suspension bridges, a control strategy based on finite element (FE) methods was analyzed. FE methods for construction control were presented in this paper by applying backward and forward methods and unstressed state methods. Accurate FE simulation methods for sensitive regions (i.e., the tangent point between the cable and saddle as well as the state of the splay cable) were obtained, and the precise alignment of free cables was also calculated. The cable strands were also revised piecewise based on their characteristics after calculating the unstressed length of the main cable. Practical FE methods for simulating the pre-offsetting of the saddle and clip in free cable states were also proposed. The alignment of the free cable and other relevant parameters of self-anchored suspension bridges can be accurately computed using these proposed methods, which also generate superior controlling results in practical engineering.
Abstract：To ensure the alignment of free cables in self-anchored suspension bridges, a control strategy based on finite element (FE) methods was analyzed. FE methods for construction control were presented in this paper by applying backward and forward methods and unstressed state methods. Accurate FE simulation methods for sensitive regions (i.e., the tangent point between the cable and saddle as well as the state of the splay cable) were obtained, and the precise alignment of free cables was also calculated. The cable strands were also revised piecewise based on their characteristics after calculating the unstressed length of the main cable. Practical FE methods for simulating the pre-offsetting of the saddle and clip in free cable states were also proposed. The alignment of the free cable and other relevant parameters of self-anchored suspension bridges can be accurately computed using these proposed methods, which also generate superior controlling results in practical engineering.
魏家乐. 自锚式悬索桥空缆线形计算方法研究[J]. Journal of Highway and Transportation Research and Development, 2017, 11(4): 58-64.
WEI Jia-le. Research on a Calculation Method for Free Cable Alignment in Self-Anchored Suspension Bridges. Journal of Highway and Transportation Research and Development, 2017, 11(4): 58-64.
[1] WANG Peng, WU Xun. Analysis of Cable Shape of Suspension Bridge at Cable Finished Stage[J]. Structural Engineers, 2005,21(6):22-27.(in Chinese)
[2] TANG Mao-lin, SHEN Rui-li,QIANG Shi-zhong. An Accurate Calculation Method for Erecting Curves of Wire Strands of Long Suspension Bridges[J]. Journal of Southwest Jiaotong University, 2001,36(3):303-307.(in Chinese)
[3] LI Xiao-zhen, HU Da-lin,CHEN Xiang-bao. Computer Simulation Analysis of Long Span Suspension Bridge's Construction State[J]. China Journal of Highway and Transport, 1998,11(4):67-72.(in Chinese)
[4] WEI Jia-le. Simulation and Key Technologies for Construction Control of Self-anchor Suspension Bridge with Large Segment Hoisting Construction[D]. Xi'an:Chang'an University, 2010.(in Chinese)
[5] XIANG Zhong-fu,XU Jun-lan,DAI Zheng-hong. The Alternate Calculation Method of Constant Cable-length in Non-stress for the Structural Analysis of Suspension Bridges[J]. Journal of Chongqing Jiaotong University,2000,19(3):16-21.(in Chinese)
[6] PAN Yong-ren, FAN Li-chu. Application of Catenary Element to Calculating the Fabrica tion Length of the Main Cable of Suspension Bridge[J]. Smactural Engineers. 1998,14(3):20-24.(in Chinese)
[7] LI Zi-qi, FAN Yan-yan. Calculation Analysis and Study of Un-stressing Length of Main Cable for Self-anchored Suspension Bridge[J].Urban Roads Bridges & Flood Control,2007,12(12):91-94.(in Chinese)
[8] JAYARAMAN H B,KNUDSON W C.A Curved Element for the Analysis of Cable Structures[J]. Computers and Structures,1981,14(3):325-333.
[9] ZHANG Zhe. The Concrete Self-anchor Suspension Bridge[M].Beijing:China Communications Press,2005.(in Chinese)
[10] WEI Qun, YAN Bin,JIANG Hua. FEA of the Main Cable of Large Span Suspension Bridge[J].Water Conservancy & Electric Power Machinery,2007,29(12):19-22.(in Chinese)
[11] LI Jun, LI Xue-hong, LI Zhi-jun, et al. Calculation Method for Main Cable Curve on Single-pylon Self-anchored Suspension Bridge[J].Journal of Nanjing University of Technology,2014,36(1):77-82.(in Chinese)
[12] DI Jin, WU Jun. Calculation Methods for Cable Curve of Self-anchored Suspension Bridge[J].Journal of Traffic and Transportation Engineering,2004, 4(3):38-43.(in Chinese)
[13] HUANG Hai-yun, ZHANG Jun-ping, LIU Ai-rong, et al. Testing Study on Lateral Displacement of Main Cable and Lateral Deflection Angle of Cable Clamp in the Self-anchored Suspension Bridge with Spatial Cable System[J].Central South Highway Engineering, 2009,34(2):41-44.(in Chinese)
[1]
常柱刚, 王林凯, 夏飞龙. 基于CV NewMark-b法桥梁风致振动FSI数值模拟[J]. Journal of Highway and Transportation Research and Development, 2019, 13(2): 28-37.
2017, Vol. 11 
