拱肋倾角变化对斜靠式拱桥动力性能的影响
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摘要
以平顶山市城东河路湛河桥主桥为工程背景,采用有限元软件MIDAS/Civil建立该桥的空间有限元计算模型,分6种设计方案研究了拱肋倾角变化对斜靠式拱桥动力性能的影响。计算结果表明,主拱肋倾角和稳定拱肋倾角的变化都对斜靠式拱桥自振频率影响较大,桥梁低阶自振频率随着拱肋倾角的增大而增大,但主拱肋倾角一旦超过1°后,桥梁第6阶以后的高阶自振频率相反会减小。计算结果可为斜靠式拱桥的设计提供参考。
Backgrounded by the main bridge of Zhanhe River Bridge at Chengdonghe Road,Pingdingshan City,the software MIDAS/Civil is used to establish a 3-dimensional finite element calculation model for the double X-shape arch bridge and the effect of arch rib sloping angle changes on the dynamic performance of the type of the bridge is studied respectively for six design alternatives.The results of calculation indicate that the sloping angle changes of the main arch and stabilizing arch ribs all have significant effect on the natural vibration frequency of the bridge and the lower order vibration frequency of the bridge will increase with the augmentation of the arch rib sloping angle.However,once the sloping angle change of the main arch rib becomes greater than 1°,the high order vibration frequency after the 6th order will decrease on the contrary.The calculation in the paper may provide reference for the design of such type of the arch bridge.
Backgrounded by the main bridge of Zhanhe River Bridge at Chengdonghe Road,Pingdingshan City,the software MIDAS/Civil is used to establish a 3-dimensional finite element calculation model for the double X-shape arch bridge and the effect of arch rib sloping angle changes on the dynamic performance of the type of the bridge is studied respectively for six design alternatives.The results of calculation indicate that the sloping angle changes of the main arch and stabilizing arch ribs all have significant effect on the natural vibration frequency of the bridge and the lower order vibration frequency of the bridge will increase with the augmentation of the arch rib sloping angle.However,once the sloping angle change of the main arch rib becomes greater than 1°,the high order vibration frequency after the 6th order will decrease on the contrary.The calculation in the paper may provide reference for the design of such type of the arch bridge.
引文
[1]肖汝诚,孙海涛,贾丽君,等.斜靠式拱桥[J].上海公路,2004,(4):22-26.
[2]肖汝诚,孙海涛,贾丽君,等.昆山玉峰大桥——首座大跨度无推力斜靠式拱桥的设计研究[J].土木工程学报,2005,38(1):78-83.
[3]陈淮,孙应桃,胡锋.拱肋施工偏差对斜靠式拱桥力学性能的影响[J].桥梁建设,2007,(1):36-38.
[4]陈淮,王艳,董建华,等.康复钢管混凝土拱桥振动特性分析[J].世界地震工程,2003,19(4):51-56.
[5]陈淮,申哲会,胡锋,等.斜靠式拱桥动力特性研究[J].郑州大学学报(工学版),2005,26(4):25-28.
[6]陈淮,朱倩,葛素娟,等.韩江北桥主桥动力特性研究[J].铁道科学与工程学报,2005,2(5):28-31.
[7]李静斌,葛素娟,陈淮.5跨连续中承式钢管混凝土拱桥抗震性能分析[J].世界地震工程,2005,21(3):110-115.
[8]胡锋.斜靠式拱桥力学性能分析(硕士学位论文)[D].郑州:郑州大学,2006.
[9]孙应桃.斜靠式拱桥设计若干问题研究(硕士学位论文)[D].郑州:郑州大学,2007.
[2]肖汝诚,孙海涛,贾丽君,等.昆山玉峰大桥——首座大跨度无推力斜靠式拱桥的设计研究[J].土木工程学报,2005,38(1):78-83.
[3]陈淮,孙应桃,胡锋.拱肋施工偏差对斜靠式拱桥力学性能的影响[J].桥梁建设,2007,(1):36-38.
[4]陈淮,王艳,董建华,等.康复钢管混凝土拱桥振动特性分析[J].世界地震工程,2003,19(4):51-56.
[5]陈淮,申哲会,胡锋,等.斜靠式拱桥动力特性研究[J].郑州大学学报(工学版),2005,26(4):25-28.
[6]陈淮,朱倩,葛素娟,等.韩江北桥主桥动力特性研究[J].铁道科学与工程学报,2005,2(5):28-31.
[7]李静斌,葛素娟,陈淮.5跨连续中承式钢管混凝土拱桥抗震性能分析[J].世界地震工程,2005,21(3):110-115.
[8]胡锋.斜靠式拱桥力学性能分析(硕士学位论文)[D].郑州:郑州大学,2006.
[9]孙应桃.斜靠式拱桥设计若干问题研究(硕士学位论文)[D].郑州:郑州大学,2007.
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