多塔斜拉桥刚度提升措施
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摘要
为进一步提升多塔斜拉桥的跨越能力,明确多塔斜拉桥的结构特征,对比分析了常规双塔斜拉桥和多塔斜拉桥在活载作用下的变形特点,通过对大量文献研究成果的整理分析,得出了各类提升多塔斜拉桥主塔刚度措施的优缺点.分析了跨中交叉布索的多塔斜拉桥的受力机理,解决了多塔斜拉桥整体刚度不足的力学缺陷,并以昆斯费里大桥为依托工程,验证了跨中采用交叉布索的多塔斜拉桥方案的可行性.研究结果表明,第1类措施容易引起结构整体自重增大,拉索有效支承效率降低,破坏了斜拉桥轻盈雅致的整体美感,建议辅助采用;第2类措施改变结构体系,有较高的效率,建议重点采用;第3类措施单独使用提升中塔纵向刚度的效果不明显,建议辅助采用.
In order to increase the spanning capability of multi-tower cable-stayed bridge,and to explore mechanical properties of multi-tower cable-stayed bridge,the deformation characteristics between cable-stayed bridge with twin tower and multi-tower are analyzed,through the analysis of a large amount of literature research results,the advantages and disadvantages of various kinds of tower stiffness measures are obtained.The new stiffening cable system,stress mechanism of the crossed cables,is analyzed,the mechanical defects of the overall stiffness of the multi-tower cable-stayed bridge are solved,and according to the Queensferry Crossing as a project case,the feasibility of the multi-tower cable-stayed bridge with crossed cables is verified.The results show that the first type of measures can easily cause the overall self-weight of the structure to increase,the effective support efficiency of cables is reduced,and the overall aesthetic feeling of the light and graceful of the cablestayed bridge is destroyed,it is supporting facilities.The second one has the high efficiency by changing the structure system,it is major measures.The third one are recommended to be adopted because of the vertical stiffness of tower is not enhancement obvious.
In order to increase the spanning capability of multi-tower cable-stayed bridge,and to explore mechanical properties of multi-tower cable-stayed bridge,the deformation characteristics between cable-stayed bridge with twin tower and multi-tower are analyzed,through the analysis of a large amount of literature research results,the advantages and disadvantages of various kinds of tower stiffness measures are obtained.The new stiffening cable system,stress mechanism of the crossed cables,is analyzed,the mechanical defects of the overall stiffness of the multi-tower cable-stayed bridge are solved,and according to the Queensferry Crossing as a project case,the feasibility of the multi-tower cable-stayed bridge with crossed cables is verified.The results show that the first type of measures can easily cause the overall self-weight of the structure to increase,the effective support efficiency of cables is reduced,and the overall aesthetic feeling of the light and graceful of the cablestayed bridge is destroyed,it is supporting facilities.The second one has the high efficiency by changing the structure system,it is major measures.The third one are recommended to be adopted because of the vertical stiffness of tower is not enhancement obvious.
引文
[1]肖汝诚,姜洋,项海帆.缆索承重桥的体系比选[J].同济大学学报(自然科学版),2013,41(2):179-185.XIAO R C,JIANG Y,XIANG H F.Comparison between structural systems of cable supported bridges[J].Journal of Tongji university(Natural Science Edition),2013,41(2):179-185,207.
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[4]NAGAI M,FUJINO Y,YAMAGUCHI H,et al.Feasibility of a 1 400mspan steel cable-stayed bridge[J].Journal of Bridge Engineering,2004,9(5):444-452.
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[9]李忠三.基于静动力特性的多塔长跨斜拉桥结构体系刚度研究[D].北京:北京交通大学,2014.LI Z S.Study on rigidity of long-span cable-stayed bridge with multi-tower based on the static and dynamic characteristics[D].Beijing:BeijingJiaotong University,2014.
[10]肖明葵,王肖巍,刘纲.多塔下拉索斜拉桥静力荷载试验和计算分析[J].土木建筑与环境工程,2011,33(1):43-49.XIAO M K,WANG X W,LIU G.Static load test and calculation on multi-tower cable-stayed bridge with tiedown cables[J].Journal of Civil Architectural&Environmental Engineering,2011,33(1):43-49.
[11]陈恒大.斜拉桥近似解析方法研究[D].西安:长安大学,2017.CHEN H D.Approximate method for analyzing of cablestayed bridge[D].Xi'an:Chang'an University,2017.
[12]KITE S,CARTER M,HUSSAIN N.Design of the Forth Replacement Crossing,Scotland,UK[J].IABSESymposium Report,2010,5(1):55-62.
[13]CARTER M,KITE S,HUSSAIN N,et al.Forth Replacement Crossing:scheme design of the bridge[J].IABSE Symposium Report,2009,96(6):107-116.
[14]KITE S,HUSSAIN N,CARTER M.Forth Replacement Crossing-Scotland,UK[J].Procedia Engineering,2011,14(2):1480-1484.
[15]陈恒大,邬晓光,王希财.多塔斜拉桥竖弯基频估算实用公式[J].沈阳大学学报(自然科学版),2017,29(2):146-152.CHEN H D,WU X G,WANG X C.Estimation practical vertical frequency formula for vibration of cable-stayed bridges with three tower[J].Journal of Shenyang University(Natural Science Edition),2017,29(02):146-152.
[16]于德安,檀永刚,张哲.钢斜拉桥的稳定性评估[J].沈阳大学学报(自然科学版),2014,26(5):408-412.YU D A,TAN Y G,ZHANG Z.Stability assessment of steel cable-stayed bridges[J].Journal of Shenyang University(Natural Science Edition),2014,26(5):408-412.
[2]GIMSING N J,GEORGAKIS C T.Cable supported bridges:concept and design[M].3rd edition.Hoboken,New Jersey:Wiley,1983.
[3]CHEUNG M S,LAU D T,LI W C.Recent developments on computer bridge analysis and design[J].Progress in Structural Engineering&Materials,2015,2(3):376-385.
[4]NAGAI M,FUJINO Y,YAMAGUCHI H,et al.Feasibility of a 1 400mspan steel cable-stayed bridge[J].Journal of Bridge Engineering,2004,9(5):444-452.
[5]陈恒大,邬晓光,姚丝思,等.基于变形协调原理的多塔斜拉桥边塔纵向抗推刚度[J].铁道科学与工程学报,2017,14(2):283-289.CHEN H D,WU X G,YAO S S,et al.Longitudinal restraint stiffness of the side tower for multi-tower cablestayed bridge based on the principle of deformation coordination[J].Journal of Railway Science and Engineering,2017,14(2):283-289.
[6]TANG M C.Multispan cable-stayed bridges[C]∥Restructuring America and Beyond.ASCE,2011:455-458.
[7]石雪飞,孙建渊.三塔斜拉桥静力性能分析[C]∥中国公路学会桥梁和结构工程学会2001年桥梁学术讨论会论文集,2001.SHI X F,SUN J Z.the static performance analysis of three-tower cable-stayed bridge[C]∥Proceedings of the2001Symposium on Bridges of China Society of Highway and Bridge Engineering,2001.
[8]陈艾荣,项海帆,SCHLAICH J.多跨斜拉桥概念设计[C]∥中国土木工程学会桥梁及结构工程学会年会,1998.CHEN A R,XIANG H F,SCHLAICH J.Design of multi tower cable-stayed bridge concept[C]∥Annual Conference of Bridge and Structural Engineering Society of China Civil Engineering Society,1998.
[9]李忠三.基于静动力特性的多塔长跨斜拉桥结构体系刚度研究[D].北京:北京交通大学,2014.LI Z S.Study on rigidity of long-span cable-stayed bridge with multi-tower based on the static and dynamic characteristics[D].Beijing:BeijingJiaotong University,2014.
[10]肖明葵,王肖巍,刘纲.多塔下拉索斜拉桥静力荷载试验和计算分析[J].土木建筑与环境工程,2011,33(1):43-49.XIAO M K,WANG X W,LIU G.Static load test and calculation on multi-tower cable-stayed bridge with tiedown cables[J].Journal of Civil Architectural&Environmental Engineering,2011,33(1):43-49.
[11]陈恒大.斜拉桥近似解析方法研究[D].西安:长安大学,2017.CHEN H D.Approximate method for analyzing of cablestayed bridge[D].Xi'an:Chang'an University,2017.
[12]KITE S,CARTER M,HUSSAIN N.Design of the Forth Replacement Crossing,Scotland,UK[J].IABSESymposium Report,2010,5(1):55-62.
[13]CARTER M,KITE S,HUSSAIN N,et al.Forth Replacement Crossing:scheme design of the bridge[J].IABSE Symposium Report,2009,96(6):107-116.
[14]KITE S,HUSSAIN N,CARTER M.Forth Replacement Crossing-Scotland,UK[J].Procedia Engineering,2011,14(2):1480-1484.
[15]陈恒大,邬晓光,王希财.多塔斜拉桥竖弯基频估算实用公式[J].沈阳大学学报(自然科学版),2017,29(2):146-152.CHEN H D,WU X G,WANG X C.Estimation practical vertical frequency formula for vibration of cable-stayed bridges with three tower[J].Journal of Shenyang University(Natural Science Edition),2017,29(02):146-152.
[16]于德安,檀永刚,张哲.钢斜拉桥的稳定性评估[J].沈阳大学学报(自然科学版),2014,26(5):408-412.YU D A,TAN Y G,ZHANG Z.Stability assessment of steel cable-stayed bridges[J].Journal of Shenyang University(Natural Science Edition),2014,26(5):408-412.