摘要
研发了一种可“临-永”转换的抢修钢墩,基于ABAQUS三维仿真模拟,首先通过极限承载力因素影响分析确定主材选型;在此基础上,开展钢墩非损伤及损伤状态结构极限承载力研究。结果表明:钢墩极限承载力随支墩径厚比增大而减小,随钢材强度等级提高而增大;钢墩损伤位置相同时,损伤程度越深,极限荷载系数越敏感;钢墩损伤程度相同时,损伤位置越靠近下方,对极限荷载系数的影响越显著;节段局部损伤时,相较于材料刚度退化,随着折减系数的变化,截面尺寸缩减和材料强度退化对极限荷载系数的影响趋势相近、程度相当,且影响更加明显;节段整体损伤时,截面尺寸缩减影响最大,材料强度退化次之,材料刚度退化最小。
A temporary-permanent conversion rush-repair steel pier was developed.Based on ABAQUS three-dimensional simulation,the selection of main material was determined by analyzing the influence factors of ultimate bearing capacity.On this basis,the ultimate bearing capacity of steel pier structures in non-damaged and damaged state was studied.The results show that,the ultimate load bearing capacity of steel pier decreases with the increase of pier diameter to thickness ratio and increases with the increase of steel strength grade.When steel pier damage position is same,the deeper the damage degree is,the more sensitive the ultimate load coefficient is.When the damage degree of steel pier is same,the closer the damage position is to the bottom,the more significant the influence on the ultimate load coefficient is.In the local segmental damage,compared with material stiffness degradation,with the change of reduction coefficient,the impact of section size reduction and material strength degradation on the ultimate load coefficient is similar and more obvious.In the overall damage,the reduction of cross section size has the greatest effect,followed by material strength degradation and material stiffness degradation.
作者
刘子玉
陈士通
支墨墨
黄晓明
陈哲心
LIU Zi-yu;CHEN Shi-tong;ZHI Mo-mo;HUANG Xiao-ming;CHEN Zhe-xin(Collaborative Innovation Center for Performance and Security of Large-scale Infrastructure,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;Hebei Eng.Research Center for Traffic Emergency and Guarantee,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Transportation,Southeast University,Nanjing 210096,China;Jinan Kingyue Highway Engineering Company Limited,Jinan 250101,China)
出处
《吉林大学学报（工学版）》
EI
CAS
CSCD
北大核心
2023年第6期1601-1611,共11页
Journal of Jilin University:Engineering and Technology Edition
基金
国家重点研发计划项目(2021YFB2600605,2021YFB2600600).
关键词
桥梁工程
抢修钢墩
“临-永”转换
极限承载力
应急使用
bridge engineering
rush-repair steel pier
temporary-permanent conversion
ultimate bearing capacity
emergency use
