摘要
研究目的:新广州站房屋盖主要采用内凹式索拱结构形式,为全面了解和掌握索拱结构的受力性能及可能产生的5种影响,为施工图设计提供依据,特对此进行研究。研究结论:索拱采用两端弹性支座,拉索至拱身的高度h=0.6H,拱身截面取650×25时,索拱的受力综合性能较好;计算选取的2种索截面对索拱的受力影响不大;适当加大索的初始张拉力,有利于改善索拱结构在承受向上荷载的受力性能。总之索拱结构在向下的荷载作用下受力形式较为合理;但在向上的荷载作用下,拱身弯曲应力较大,支座水平反力增加,索拱变形也加大,拉索可能松弛。但可通过合理选择支座类型。
Research purposes： The main structure form of the roof of New Guangzhou Railway Station is inner cable-arch structure, so the researches are done on it for the purposes of getting more knowledge about the stress performance of cable - arch structure to provide the basis for construction and design.
Research conclusions： If the support of cable - arch structure is elastic, the distance from the cable to the arch is equal to 0. 6H and section of arch is Ф650×25, the cable - arch structure has a better comprehensive mechanical performance, and there is little influence on the mechanical property of cable - arch structure when choosing two different cables. Properly increasing the initial tension is beneficial to the mechanical property of cable - arch structure under upward loading. In a word, the mechanical property of cable - arch structure under downward loading is reasonable. But if the loading is upward, the bending stress of the arch becomes large and the horizontal reacting force on the support increases, resulting in the deformation of cable - arch becoming large and the cable relaxing. However, it can be controlled with more reasonable support type or increasing the initial tension.
出处
《铁道工程学报》
EI
北大核心
2008年第6期71-75,79,共6页
Journal of Railway Engineering Society
关键词
站房
内凹式
索拱结构
受力性能
分析
station
inner cable - arch
cable - arch structure
mechanical property
analysis
