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。
The beam-arch association bridge was treated sure and hanger, and assumed the hanger force as filmy as a two-component structure of beam-arch clotension 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.
出处
《力学季刊》
CSCD
北大核心
2007年第1期153-159,共7页
Chinese Quarterly of Mechanics
基金
高等学校博士学科点专项科研基金(20050247029)
关键词
梁拱组合桥梁
协作机理
荷载比
弯矩比
beam-arch association bridge
cooperation mechanics
ratio of load sharing
ratio of moment sharing
