斜靠式拱桥拱肋倾角变化对稳定性能的影响
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摘要
采用有限元软件M IDAS/C ivil建立平顶山市城东河路湛河斜靠式拱桥的空间有限元计算模型,分7种设计方案探讨斜靠式拱桥主拱和稳定拱肋的倾角变化对桥梁稳定性能的影响。计算结果表明,斜靠式拱桥的稳定性能较好,各方案的稳定系数均大于7;主拱肋倾角的增大有利于提高斜靠式拱桥低阶稳定性能;稳定拱肋倾角的增大不利于提高斜靠式拱桥稳定性能,在进行斜靠式拱桥设计时稳定拱肋的倾角不宜太大,以8°~10°为宜。
The three dimensional finite element calculating model of the main bridge of Zhanhe Bridge over the Chengdong-River Road in Pingdingshan city was established by using the software MIDAS/Civil.Seven design proposals were used to study the variational sloping angle of arch rib influenced on the stability of double X-shaped arch bridge.The results indicate that the stability of the double X-shaped arch bridge is well and the stability factor of each proposal are all bigger than 7.The augmentation of the main arch rib's sloping angle is benefit to improving the lower order stability property of the double X-shaped arch bridge.On the contrary,the augmentation of the stable arch rib's sloping angle is not benefit to improving the stability.So,when designing the double X-shaped arch bridge,the sloping angle of the stable arch rib is unsuitable to be too big and from 8° to 10° is the best.
The three dimensional finite element calculating model of the main bridge of Zhanhe Bridge over the Chengdong-River Road in Pingdingshan city was established by using the software MIDAS/Civil.Seven design proposals were used to study the variational sloping angle of arch rib influenced on the stability of double X-shaped arch bridge.The results indicate that the stability of the double X-shaped arch bridge is well and the stability factor of each proposal are all bigger than 7.The augmentation of the main arch rib's sloping angle is benefit to improving the lower order stability property of the double X-shaped arch bridge.On the contrary,the augmentation of the stable arch rib's sloping angle is not benefit to improving the stability.So,when designing the double X-shaped arch bridge,the sloping angle of the stable arch rib is unsuitable to be too big and from 8° to 10° is the best.
引文
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[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.XIAO Ru-cheng,SUM Hai-tao,JIA Li-jun,et al.KunshanYufeng bridge———design of the first long-span leaning-type arch bridge without thrust[J].China Civil Engi-neering Journal,2005,38(1):78-83.
[3]孙应桃.斜靠式拱桥设计若干问题研究[D].郑州:郑州大学,2007.SUN Ying-tao.Study of some design issue of double X-shape arch bridge[D].Zhengzhou:Zhengzhou Universi-ty,2007.
[4]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.CHEN Huai,SUN Ying-tao,HU Feng.Effect of arch ribconstruction errors on mechanical properties of double X-shape arch bridge[J].Bridge Construction,2007(1):36-38.
[5]谷定宇,陈淮,王艳,等.潮洲韩江北桥斜靠拱桥稳定性分析[J].公路交通科技,2006,23(3):100-103.GU Ding-yu,CHEN Huai,WANG Yan,et al.Stability a-nalysis of the chaozhou hanjiang river northen double x-shape arch bridge[J].Journal of Highway and Transporta-tion Research and Development,2006,23(3):100-103.
[6]陈淮,胡锋,申哲会,等.斜靠式拱桥稳定性分析[J].福州大学学报:自然科学版,2005(增刊):182-186.CHEN Huai,HU Feng,SHEN Zhe-hui,et al.Stability a-nalysis of double X-shape arch bridge[J].Journal ofFuzhou University:Natural Sciences Edtion,2005(Sup-plement):182-186.
[7]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.CHEN Huai,WANG Yan,DONG Jian-hua,et al.Dy-namic characteristics analysis of Kangfu concrete filledsteel tubular arch bridge[J].World Information on EarthEngineering,2003,19(4):51-56.
[8]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.CHEN Huai,Shen Zhe-hui,Fu Feng,et al.Study on dy-namic characteristics of leaning-type arch bridge[J].Journal of Zhengzhou University:Engineering Science,2005,26(4):25-28.
[9]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.CHEN Huai,ZHUQian,GE Su-juan,et al.Dynamic char-acteristics analysis of Hanjiang Northern Bridge[J].Jour-nal of Railway Science and Engineering,2005,2(5):28-31.
[10]胡锋.斜靠式拱桥力学性能分析[D].郑州:郑州大学,2006.FU Feng.The mechanic performance analysis of doubleX-shape arch bridge[D].Zhengzhou:Zhengzhou Uni-versity,2006.
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