防灾减灾工程学报2024，Vol.44Issue(3)：623-631,9.DOI:10.13409/j.cnki.jdpme.20221231001
边墩沉降致连续简支桥段纵连线桥系统层间联结劣化规律
Deterioration Patterns of Interlayer Connections in Longitudinally Connected Line Bridge Systems on Continuous Simply Supported Beam Bridge Sections Induced by Side Pier Settlement
摘要
Abstract
This study delves into the degradation of interlayer connections within longitudinally con-nected slab ballastless track-continuous beam line bridge systems(LCLBS)caused by side pier settle-ment.Incorporating the effects of side pier settlement and discontinuous contact between layers,a non-linear spatial model of LCLBS was developed and validated against a previously established theoreti-cal model.Subsequently,the typical deformation modes of the LCLBS under side pier settlement,along with the evolution process,development trends,and locations of interlayer connection failure were thoroughly analyzed.The findings underscore the accuracy and reliability of the spatial model.Under side pier settlement,LCLBS manifested three distinct deformation modes:follow deformation,self-weight deformation,and hovering separation.Interlayer connection failure occurred above the set-tlement pier,the simply supported beam piers adjacent to the settlement pier,and the opposite side pier of the continuous beam bridge.Bearings on the simply supported beam piers adjacent to the settle-ment pier and on all piers of the continuous beam bridge were damaged.The clearance height at the slab bottom near the settlement pier was quantifiable by subtracting the deformation limit of the contin-uous beam bridge from the settlement value of the side pier.Furthermore,the length of each clearance zone expanded with the amplitude of the side pier settlement,exhibiting symmetrically distributed clearance lengths on both sides of the simply supported beam piers adjoining the settlement pier.Con-versely,the clearance length at the pier on the opposite side of the continuous beam was solely dictat-ed by the continuous beam's deformation,consistently maintained at 2.56 meters.关键词
高速铁路/桥墩沉降/损伤演化/悬停分离/连续梁桥Key words
high-speed railway/pier settlement/damage evolution/hovering separation/continuous girder bridge分类
交通工程引用本文复制引用
冯玉林,何帅,蒋丽忠,周旺保,颜建伟..边墩沉降致连续简支桥段纵连线桥系统层间联结劣化规律[J].防灾减灾工程学报,2024,44(3):623-631,9.基金项目
国家自然科学基金(52268074,U1934207)、湖南省自然科学基金资助项目(2023JJ40724)、江西省自然科学基金资助项目(20224BAB214073,20232BAB204081)、高速铁路建造技术国家工程研究中心开放基金(HSR202202)、轨道交通基础设施性能监测与保障国家重点实验室开放课题(HJGZ2022106)资助 （52268074,U1934207）
