应急钢桁梁桥钢销节点疲劳性能分析  

Fatigue Performance Analysis of Steel Pin Joints in Emergency Steel Truss Bridges

作　　者：陈士通 刘屹[3] 王志远 郝伟[2] 史海东 CHEN Shitong;LIU Yi;WANG Zhiyuan;HAO Wei;SHI Haidong(Hebei Engineering Research Center for Traffic Emergency and Guarantee,Shijiazhuang 050043,China;School of Safety Engineering and Emergency Management,Shijiazhuang Tiedao University,Shijiazhuang 050043,China;School of Civil Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China)

机构地区：[1]河北省交通应急保障工程技术研究中心,河北石家庄050043 [2]石家庄铁道大学安全工程与应急管理学院,河北石家庄050043 [3]石家庄铁道大学土木工程学院,河北石家庄050043

出　　处：《石家庄铁道大学学报（自然科学版）》2024年第2期1-6,39,共7页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家重点研发计划(2021YFB2600605)。

摘　　要：应急钢桁梁作为拼装式结构,反复安拆及倒运过程中可能导致销孔连接位置出现损伤,对其使用寿命产生影响。以某128 m跨应急钢桁梁桥为研究对象,缩短销孔边距,模拟钢桁梁销孔损伤影响,开展疲劳性能试验及仿真模拟,研究钢销节点疲劳性能。结果表明,静力仿真结果与疲劳试验结果具有较好的一致性,验证了模型的可靠性;试验钢销节点损伤后的疲劳寿命仅为16980次,FE-SAFE仿真分析求得疲劳寿命为20592次,两者较为接近,进一步验证了疲劳试验结果的可靠性。考虑销孔损伤的疲劳寿命与正常状态相比差异显著,说明销孔损伤会大幅降低其疲劳寿命。因此应注意应急钢桁梁杆件保护,同时加强钢销节点质量控制。In emergency steel truss bridges,which are characterized as assembled structures,damage to the pin hole connection locations may occur during repeated processes of assembly,disassembly,and transportation,thereby impacting their service life.Accordingly,a specific 128 m span emergency steel truss bridge was selected for study.The edge distances of the pin holes were reduced to simulate the effects of damage on steel truss pin holes.Fatigue performance tests and simulation models were conducted to investigate the fatigue performance of steel pin joints.The results indicate that there is considerable consistency between the static simulation outcomes and the fatigue test results,thereby confirming the reliability of the model.The fatigue life of the steel pin joints,post-damage,as determined through experimentation,is only 16980 cycles,while the fatigue life derived from FE-SAFE simulation analysis is 20592 cycles,which are closely aligned,further verifying the reliability of the fatigue test results.The significant difference in fatigue life when considering pin hole damage,as compared to the normal state,suggests that such damage can considerably reduce the fatigue life.Therefore,attention should be given to the protection of rod components in emergency steel truss bridges,and the quality control of steel pin joints should be strengthened.

关 键 词：应急 钢桁梁桥 钢销节点 销孔损伤 相似模型 疲劳 

分 类 号：U441.4[建筑科学—桥梁与隧道工程]