铁道科学与工程学报Issue(4)：829-832,4.
大跨度铁路连续梁拱组合桥的合理边中跨比研究
Research on reasonable side and mid-span ratio of railway long-span continuous beam-arch bridge
摘要
Abstract
Span ratio is one of the important design parameters in continuous beam -arch bridge,which directly affects the structural stress reasonably.In order to learn the effects of span ratio on the structural force of railway continuous beam -arch bridge,statistics of span ratio in the current long -span railway beam -arch bridges was analyzed.Taking an (82 +172 +82)m long -span continuous beam -arch bridge on the Lanzhou -Chongqing railway as an example,the effects of span ratio on its internal force,displacement,support reaction,stability and so on were analyzed.The analysis results show that the span ratio of long -span railway continuous beam -arch bridge varies from 0.46 to 0.51.Small span ratio is in favor of structural stress and deformation,but the e-mergence of negative support reaction limits its value should be greater than 0.43.While the contribution of span ratio to natural frequency and structural stability is small.Moreover,it is found that the value of stability factors only increased 7.6% with the span ratio increasing from 0.447 to 0.506.关键词
梁拱组合桥/边中跨比/结构内力/支反力/稳定性Key words
beam -arch composite bridge/span ratio/structural internal force/support reaction/stability分类
交通工程引用本文复制引用
戴公连,唐立新,汪禹..大跨度铁路连续梁拱组合桥的合理边中跨比研究[J].铁道科学与工程学报,2015,(4):829-832,4.基金项目
国家自然科学基金资助项目（51378503）；高速铁路基础研究联合基金资助项目 （）
