多塔斜拉-悬吊协作体桥力学性能探讨
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摘要
采用有限元方法,应用分析软件ANSYS,建立3至6塔主跨跨径为1 400 m的多塔斜拉-悬吊协作桥(简称多塔协作桥)有限元计算模型,研究了索塔数对多塔协作桥静力特性、动力特性和静力稳定性的影响特点,探讨了其对多塔协作桥活载挠度、塔顶纵向位移及主缆抗滑移性能等关键力学问题的影响特征.分析结果表明:索塔数由3塔增至6塔时,塔根弯矩最大增大50%,主梁弯矩最大增大33%,主缆抗滑移系数最大减小36%,中间塔顶位移减小2%,一阶弹性稳定系数最大下降8.3%,颤振稳定性指数最大增加9.2%;主梁边跨竖向挠度比中间跨小36%左右,且中间跨挠度相近;索塔数对索塔受力影响显著.
Four 3d finite element models for 3 to 6 cable-stayed suspension bridges are established by ANSYS software. The static property,dynamic property and static stability property of multi-tower bridge is analyzed and some characteristics are found. Furthermore,the key mechanics problems affected by tower- number,such as deflection of beam,longitudinal displacements of tower,anti-slide of main cable,are discussed. The result show that comparing study on mechanics property of 3 to 6 cable-stayed suspension bridge,bend moment of tower root increase maximally 50%,bend moment of beam increase maximally 33%,the anti-slide factor decrease maximally 36%,longitudinal displacement of middle tower decrease 2%,first order instability factor decrease maximally 8. 3%,flutter stability index increase maximally 9. 2%. The beam deflection of middle span is similar and larger than side span about 36%. Number of tower significant effect on its inter-force.
Four 3d finite element models for 3 to 6 cable-stayed suspension bridges are established by ANSYS software. The static property,dynamic property and static stability property of multi-tower bridge is analyzed and some characteristics are found. Furthermore,the key mechanics problems affected by tower- number,such as deflection of beam,longitudinal displacements of tower,anti-slide of main cable,are discussed. The result show that comparing study on mechanics property of 3 to 6 cable-stayed suspension bridge,bend moment of tower root increase maximally 50%,bend moment of beam increase maximally 33%,the anti-slide factor decrease maximally 36%,longitudinal displacement of middle tower decrease 2%,first order instability factor decrease maximally 8. 3%,flutter stability index increase maximally 9. 2%. The beam deflection of middle span is similar and larger than side span about 36%. Number of tower significant effect on its inter-force.
引文
[1]杨进.悬吊斜拉组合桥结构应用于武汉市杨泗长江大桥的技术经济优势分析[J].桥梁建设,2010(5):1-2.
[2]杨进.多塔多跨悬索桥应用于海峡长桥建设的技术可行性与技术优势[J].桥梁建设,2009(2):36-39.
[3]许福友,张哲,黄才良,等.斜拉-悬吊协作体系桥工程应用及特点分析[J].中外公路,2009,29(1):98-101.
[4]石磊,夏国平,苗峰.温度作用下斜拉-悬索协作体系桥静力分析[J].沈阳建筑大学学报(自然科学版),2010,26(3):485-491.
[5]张哲,韩立中,万其柏.自锚式斜拉-悬吊协作体系桥的设计研究[J].公路交通科技,2010,27(6):46-51.
[6]张哲,朱巍志,王会利.自锚式斜拉-悬索协作体系桥的方案设计[J].桥梁建设,2009(4):50-53.
[7]夏国平,张哲,叶毅.斜拉-悬索协作体系桥的温度效应分析[J].武汉理工大学学报(交通科学与工程版),2009,33(5):892-896.
[8]张新军,孙炳楠,陈艾荣,等.斜拉-悬吊协作体系桥的颤振稳定性研究[J].土木工程学报,2004,37(7):106-110.
[9]韩立中,张哲,张劲泉,等.大跨自锚式斜拉-悬索协作体系桥地震响应及减震控制分析研究[J].武汉理工大学学报(交通科学与工程版),2011,35(5):945-949.
[10]Haijun W,Yukitake S,Akira H,et al.Displacement characteristics of compound bridge of suspension bridges and cable-stayed bridges[C]//Cable-supported bridges challenging technical limits,Seoul,IABSE,2001:86-87..
[11]浙江连岛工程建设指挥部,中交公路规划设计院,中国铁道科学研究院.特大跨径钢箱梁悬索桥设计指南(DB33/T 856-2012)[M].杭州:浙江省质量技术监督局,2012.
[12]姜洋,肖汝诚,李扬,等.多塔悬索桥主缆与鞍座滑动失稳临界跨径[J].同济大学学报(自然科学版),2012,40(3):331-337.
[2]杨进.多塔多跨悬索桥应用于海峡长桥建设的技术可行性与技术优势[J].桥梁建设,2009(2):36-39.
[3]许福友,张哲,黄才良,等.斜拉-悬吊协作体系桥工程应用及特点分析[J].中外公路,2009,29(1):98-101.
[4]石磊,夏国平,苗峰.温度作用下斜拉-悬索协作体系桥静力分析[J].沈阳建筑大学学报(自然科学版),2010,26(3):485-491.
[5]张哲,韩立中,万其柏.自锚式斜拉-悬吊协作体系桥的设计研究[J].公路交通科技,2010,27(6):46-51.
[6]张哲,朱巍志,王会利.自锚式斜拉-悬索协作体系桥的方案设计[J].桥梁建设,2009(4):50-53.
[7]夏国平,张哲,叶毅.斜拉-悬索协作体系桥的温度效应分析[J].武汉理工大学学报(交通科学与工程版),2009,33(5):892-896.
[8]张新军,孙炳楠,陈艾荣,等.斜拉-悬吊协作体系桥的颤振稳定性研究[J].土木工程学报,2004,37(7):106-110.
[9]韩立中,张哲,张劲泉,等.大跨自锚式斜拉-悬索协作体系桥地震响应及减震控制分析研究[J].武汉理工大学学报(交通科学与工程版),2011,35(5):945-949.
[10]Haijun W,Yukitake S,Akira H,et al.Displacement characteristics of compound bridge of suspension bridges and cable-stayed bridges[C]//Cable-supported bridges challenging technical limits,Seoul,IABSE,2001:86-87..
[11]浙江连岛工程建设指挥部,中交公路规划设计院,中国铁道科学研究院.特大跨径钢箱梁悬索桥设计指南(DB33/T 856-2012)[M].杭州:浙江省质量技术监督局,2012.
[12]姜洋,肖汝诚,李扬,等.多塔悬索桥主缆与鞍座滑动失稳临界跨径[J].同济大学学报(自然科学版),2012,40(3):331-337.
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