土木与环境工程学报（中英文）2024，Vol.46Issue(2)：154-164,11.DOI:10.11835/j.issn.2096-6717.2023.045
高速铁路32 m简支箱梁墩台横桥向沉降静力影响及损伤评级
Static influence and damage classification on 32 m simply-supported box girder of the high-speed railway under pier transverse settlement
摘要
Abstract
Due to the uneven transverse settlement of bridge piers caused by the parallel construction of existing and new high-speed railway lines,a CRTS Ⅲ slab track-bridge system static-coupled model was established using the ABAQUS finite element analysis method for a commonly used 32 m standard double-track multi-span simply supported beam bridge in high-speed railways.Considering different settlement types and settlement amplitudes,this paper studies the force between layers of track structure and the deformation law of rail surface caused by the uneven settlement of piers in the transverse direction.On this basis,the static damage classification and maintenance suggestions for the uneven settlement of single and double piers in the transverse direction under this type of bridge are proposed.Based on this analysis,static damage classification and repair recommendations were proposed for single and double-pier uneven transverse settlement of this bridge type.The results have shown that the uneven settlement of the pier in a transverse direction has the greatest influence on the vertical irregularity of the rail surface,followed by the distortion and the horizontal irregularity,and the deformation extremum is easy to appear at the top of the settlement pier.When the unilateral settlement of the pier in the transverse direction of the bridge,the settlement difference between the singer pier of 10 mm,15 mm and 20 mm,its damage classification is rated as Ⅱ,Ⅲ and Ⅳ.It is necessary to pay attention to the bilateral settlement of the pier across the bridge,and the damage is more serious than the unilateral settlement.When the settlement difference of the transverse direction reaches 20 mm,the transverse tensile stress of the self-compacting concrete layer exceeds the tensile strength limit of C40 concrete,and the track structure has the risk of cracking.It is recommended that the uneven settlement in the transverse direction of the single and double piers should be limited to 10 mm or less for daily maintenance and that adverse settlement of 15 mm or more should be avoided.关键词
高速铁路/简支箱梁/墩台沉降/横桥向沉降/受力变形/静态损伤分级Key words
high-speed railway/simply-supported box girder/pier settlement/transverse settlement/stress and deformation/static damage classification分类
交通工程引用本文复制引用
余翠英,杨沁婕,罗文俊,马斌..高速铁路32 m简支箱梁墩台横桥向沉降静力影响及损伤评级[J].土木与环境工程学报（中英文）,2024,46(2):154-164,11.基金项目
国家自然科学基金(52068028) （52068028）
江西省自然科学基金(20212BAB204015) （20212BAB204015）
江西省教育厅科技资助项目(GJJ190329) （GJJ190329）
华东交通大学博士启动资金(452) National Natural Science Foundation of China(No.52068028) （452）
Natural Science Foundation of Jiangxi Province(No.20212BAB204015) （No.20212BAB204015）
Science and Technology Foundation of Department of Education of Jiangxi Province(No.GJJ190329) （No.GJJ190329）
Startup Foundation for Doctors of East China Jiaotong University(No.452) （No.452）
