三塔斜拉-自锚式悬索组合结构计算方法及参数分析
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摘要
为了掌握三塔斜拉-自锚式悬索组合结构的力学特点和计算方法,以汉中市西二环特大桥为例,进行了成桥状态计算方法研究,并结合实际工程中常用的结构参数对其进行力学性能影响分析。结果表明,该类结构在计算中非线性效应较突出;对于自锚式悬索体系部分,处理好悬索体系主缆矢跨比和背索在主梁上的锚固间距可优化副塔受力;对于斜拉索体系部分,主梁的截面形式及斜拉索的锚固间距对结构影响不大。
A self-anchored suspension and cable-stayed structure with three towers is located in Hanzhong,Shaanxi,China,which has a span of 705 meters.In order to study the mechanical properties of this bridge,the influence parameters of nonlinearity,rise-span ratio of main cable,anchor space of minor-cable and main-cable are analyzed.Numerical results show that effect of nonlinearity should be considered in the design and calculation of medium-span self-anchored suspension and cable-stayed bridge;reasonable arrangement of rise-span ratio of main cable and anchor space of minor-cable is the main point in the design of minor-tower.
A self-anchored suspension and cable-stayed structure with three towers is located in Hanzhong,Shaanxi,China,which has a span of 705 meters.In order to study the mechanical properties of this bridge,the influence parameters of nonlinearity,rise-span ratio of main cable,anchor space of minor-cable and main-cable are analyzed.Numerical results show that effect of nonlinearity should be considered in the design and calculation of medium-span self-anchored suspension and cable-stayed bridge;reasonable arrangement of rise-span ratio of main cable and anchor space of minor-cable is the main point in the design of minor-tower.
引文
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[2]张哲,朱巍志,潘盛山,等.基于几何非线性的自锚式斜拉—悬索协作体系桥成桥索力计算[J].沈阳建筑大学学报,2009,25(5):822-828.ZHANG Zhe,ZHU Wei-zhi,PAN Sheng-shan.Research on reasonable initial cable force of self anchored cable stayed sus-pension bridge based on geometrical nonlinearity analysis[J].Journal of Shenyang Jianzhu University(Natural Science),2009,25(5):822-828.
[3]韩艳,陈政清,罗世东,等.自锚式悬索桥空间主缆线形的计算方法[J].湖南大学学报,2007,34(12):20-25.HAN Yan,CHEN Zheng-qing,LUO Shi-dong.Calculation method for the shape finding of self anchored suspension bridgewith spatial cables[J].Journal of Hunan University(Natural Sciences),2007,34(12):20-25.
[4]颜东煌,李学文,刘光栋,等.混凝土斜拉桥合理成桥状态确定的分步算法[J].中国公路学报,2003,16(1):43-46.YAN Dong-huang,LI Xue-wen,LIU Guang-dong,et al.Step-by-step arithmetic for the reasonable finished dead state of the concrete cable-stayed bridges[J].China Journal of Highway and Transport,2003,16(1):43-46.
[5]狄谨,武隽.自锚式悬索桥主缆线形计算方法[J].交通运输工程学报,2004,4(3):38-43.DI Jin,WU Jun.Calculation methods for cable curve of self anchored suspension bridge[J].Journal of Traffic and Transpor-tation Engineering,2004,4(3):38-43.
[6]罗喜恒.悬索桥缆索系统的数值分析法[J].同济大学学报,2004,32(4):441-444.LUO Xi-heng.Numerical analysis method for cable system of suspension bridges[J].Journal of Tongji University,2004,32(4):441-444.
[7]秦泗凤,张哲,王会利,等.非线性缆索单元及其在缆索承重桥中的应用[J].武汉理工大学学报(交通科学与工程版),2008,32(3):389-392.QIN Si-feng,ZHANG Zhe,WANG Hui-li.Application of nonlinear cable element on cable supported bridge[J].Journal of Wuhan University of Technology(Transportation Science&Engineering),2008,32(3):389-392.
[8]周士金,刘荣桂,蔡东升,等.CFRP索和钢索斜拉桥地震响应分析与抗震验算[J].建筑科学与工程学报,2009,36(3):76-81.ZHOU Shi-jin,LIU Rong-gui,CAI Dong-sheng,et al.Seismic response analysis and seismic resistance checking of cable-stayed bridges with CFRP cables and steel cables[J].Journal of Architecture and Civil Engineering,2009,36(3):76-81.
[9]杜修力,张建伟,符佳,等.钢筋混凝土构件的尺寸效应研究进展及展望[J].建筑科学与工程学报,2009,36(3):14-19.DU Xiu-li,ZHANG Jian-wei,FU Jia,et al.Research progress and prospect of size effect on reinforced concrete members[J].Journal of Architecture and Civil Engineering,2009,36(3):14-19.
[10]刘永健,刘剑,朱铭,等.双层桥面三桁刚性悬索加劲钢桁梁桥全桥静动力模型设计[J].建筑科学与工程学报,2009,25(1):84-87.LIU Yong-jian,LIU Jian,ZHU Ming,et al.Static and dynamic model design of total bridge of double-deck and three main trusses steel bridge with rigid cable[J].Journal of Architecture and Civil Engineering,2009,25(1):84-87.
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