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下承式梁拱组合桥梁的梁拱协作机理研究
引用本文:易云煙,肖汝诚.下承式梁拱组合桥梁的梁拱协作机理研究[J].上海力学,2007,28(1):153-159.
作者姓名:易云煙  肖汝诚
作者单位:同济大学桥梁工程系 上海200092
基金项目:高等学校博士学科点专项科研项目
摘    要:文章将外部静定、内部高次超静定的梁拱组合桥梁分解成梁拱闭合体和吊杆两种构件,并且将吊杆力假定为膜张力,求解出了梁拱组合桥梁在均布荷载作用下拱肋分担的荷载大小及其修正系数,明确了其传力途径,定量地求出了梁拱分担的荷载比例,拱梁的拉压力偶矩大小以及梁拱截面的弯矩,并讨论了拱梁荷载比、弯矩比的影响因素及其关系,完整地揭示了下承式梁拱组合桥梁的梁拱协作机理.

关 键 词:梁拱组合桥梁  协作机理  荷载比  弯矩比
文章编号:0254-0053(2007)01-153-7
收稿时间:2006-11-20
修稿时间:2006-11-20

Cooperation Mechanics Study between Beam and Arch for Beam-Arch Association Bridge
YI Yun-kun,XIAO Ru-cheng.Cooperation Mechanics Study between Beam and Arch for Beam-Arch Association Bridge[J].Chinese Quarterly Mechanics,2007,28(1):153-159.
Authors:YI Yun-kun  XIAO Ru-cheng
Institution:Department of Bridge Engineering, Tongji University, Shanghai 200092, China
Abstract:The beam-arch association bridge was treated as a two-component structure of beam-arch closure and hanger,and assumed the hanger force as filmy tension one.By the assumption,the expressions of suspender tension force and its modified coefficients were supplied.The expression of beam-arch ratio of load sharing,moment of couple caused by tension force and pressure force in arch and beam,ratio of residual moment sharing endured by the arch and beam were achieved.Moreover,their influence factors were discussed.The cooperation mechanics between beam and arch is fully disclosed.
Keywords:beam-arch association bridge  cooperation mechanics  ratio of load sharing  ratio of moment sharing
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