西南交通大学学报2017，Vol.52Issue(6)：1088-1096,9.DOI:10.3969/j.issn.0258-2724.2017.06.008
大跨度高速铁路劲性骨架混凝土拱桥模型试验研究
Model Test Study on Long-Span Railway Concrete Arch Bridge with Rigid Skeleton
摘要
Abstract
The Beipanjiang bridge is a 445 m concrete arch reinforced rigid skeleton bridge on the high-speed railway from Shanghai to Kunming.The bridge deck is designed to comply with design rail speeds of 350 km/h and subsequently requires strictly controlled stresses and deformation for this ballast-less track.To verify the safety of the bridge during construction and in service and to rationalise the use of outsourced concrete construction methods,a 1 ∶ 7.5 scaled model based on the prototype bridge was constructed.The loading method and arrangement of control sections and measuring points are discussed.Comparing the test results and computed results provides a comprehensive understanding of the mechanical behavior of the bridge.The results indicate that the maximum stress of the steel tube is 250 MPa,located at the upper chord of 1/2 cross section and the maximum stress of the C60 outsourced concrete is 17 MPa,located at the side-box bottom of the half cross section,whilst the maximum displacement of the arch ring is 68 mm,also positioned at the half cross section.Considering the stress equivalent and geometric similarity principles,the comparative results indicate that the stress and displacement of the model bridge align with the design parameters of the prototype.Model test results prove that the stress and deformation of the prototype bridge can meet the requirements during construction.关键词
高速铁路/劲性骨架/钢筋混凝土拱桥/模型试验Key words
high-speed railway/rigid skeleton/reinforced concrete arch bridge/model test分类
交通工程引用本文复制引用
张双洋,赵人达,贾毅,王永宝,谢海清..大跨度高速铁路劲性骨架混凝土拱桥模型试验研究[J].西南交通大学学报,2017,52(6):1088-1096,9.基金项目
国家自然科学基金资助项目(51308468) （51308468）
铁道部科技计划资助项目(2010G018-A-1-06) （2010G018-A-1-06）
