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[1]吴奇伦,薛艳霞,苏振超.考虑轴距轴数的BRT桥梁跨中动挠度的仿真分析[J].厦门理工学院学报,2021,29(1):73-78.[doi:1019697/jcnki16734432202101011]
 WU Qilun,XUE Yanxia,SU Zhenchao.Simulation Analysis of Midspan Dynamic Deflection ofBRT Bridge Considering Wheelbase and Number of Axes[J].Journal of JOURNAL OF XIAMEN,2021,29(1):73-78.[doi:1019697/jcnki16734432202101011]
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考虑轴距轴数的BRT桥梁跨中动挠度的仿真分析(PDF/HTML)
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《厦门理工学院学报》[ISSN:1673-4432/CN:35-1289/Z]

卷:
29
期数:
2021年第1期
页码:
73-78
栏目:
建筑与土木工程
出版日期:
2021-02-28

文章信息/Info

Title:
Simulation Analysis of Midspan Dynamic Deflection of BRT Bridge Considering Wheelbase and Number of Axes
文章编号:
16734432(2021)01007306
作者:
吴奇伦12薛艳霞1 苏振超1
1厦门大学嘉庚学院土木工程学院,福建 漳州 363105; 2厦门大学土木建筑学院,福建 厦门 361005
Author(s):
WU Qilun12XUE Yanxia1SU Zhenchao1
1.School of Civil Engineering,Tan Kah Kee College,Xiamen University,Zhangzhou 363105,China; 2.School of Architecture and Civil Engineering,Xiamen University,Xiamen 361005,China
关键词:
快速公交系统(BRT)桥梁跨中动挠度车桥耦合振动移动荷载时程分析Midas Civil分析模型
Keywords:
BRT bridgemidspan dynamic deflectionvehiclebridge coupling vibrationmoving loadtime history analysisMidas Civil analysis model
分类号:
U4412
DOI:
1019697/jcnki16734432202101011
文献标志码:
A
摘要:
为更好地模拟快速公交系统(BRT)中桥梁的变形规律,基于Midas Civil软件设计出考虑车辆轴距轴数影响的三轴移动荷载模型,并以BRT中一段桥梁为例,计算出系统的固有频率和模态,将客车简化为单轴和三轴移动荷载模型,模拟仿真桥梁跨中动挠度。不同工况下的仿真结果表明:两种模型所求得的跨中最大动挠度存在较大差异。相比于三轴移动模型,单轴移动模型所得的最大动挠度较大,最大动挠度出现的时刻较早,振动时长较短,且幅值差异较大;当移动荷载的时速在10~60 km·h-1时,时速对跨中最大动挠度的影响不大,单轴模型的最大挠度较三轴模型大,偏差约在20%~25%之间。建议在模拟长轴距或多轴车辆时,应充分考虑轴距和轴数的影响,宜采用多段三角冲击荷载进行模拟
Abstract:
To simulate the deformation pattern of the bridge in the bus rapid transit system (BRT) well,a threeaxis moving load model considering the influence of vehicle wheelbase and axle number was designed based on Midas Civil software,and the natural frequency and mode of the system calculated taking a BRT bridge as an example.The bus was simplified into uniaxial and triaxial moving load models,simulating the midspan dynamic deflection of the bridge.The simulation results under different working conditions show that the maximum midspan dynamic deflection obtained from a triaxial moving model and a uniaxial motion model is quite different.The uniaxial motion model has larger maximum dynamic deflection which comes earlier and has shorter vibration duration as well as large amplitude difference.When the speed of the moving load is in the range of 10-60 km·h-1,the speed has little effect on the midspan maximum dynamic deflection.The deviation of the maximum deflection of the uniaxial model is about 20%-25%.It is suggested that the influence of wheelbase and number of axles should be fully considered when simulating long wheelbase or multiaxle vehicle,and multistage triangular impact load should be adopted for simulation.

参考文献/References:

[1] 谭也平,王健,刘智超.基于桥面不平顺导致跳车工况下的车桥相互作用分析[J].应用力学学报,2020,37(3):945952,1 382. [2] 陈榕峰,宋一凡,贺拴海,等.匀加速行驶车辆与桥梁耦合振动的分析方法[J].长安大学学报(自然科学版),2011,31(3):5154,67. [3] 勾红叶,石晓宇,周文,等.铁路大跨T形刚构桥车桥耦合振动与动力性能[J].西南交通大学学报,2018,53(4):679686. [4] 贡人非,郭恩栋,刘智,等.高速铁路车桥耦合系统自振特性分析[J].地震工程与工程振动,2014,34(增刊1):616622. [5] 沈敏,林雪飞,刘多贵.基于Midas Civil的简易车桥耦合振动分析[J].西部交通科技,2012(8):6871,143. [6] 王端胜,苑晓明,徐向立.基于MIDAS/CIVIL的阜新绕城公路桥梁动力特性分析[J].山西建筑,2014,40(21):205206. [7] 葛俊颖.桥梁工程软件Midas Civil使用指南[M].北京:人民交通出版社,2013.

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备注/Memo

备注/Memo:
收稿日期:20200418修回日期:20200911 通信作者:薛艳霞,女,副教授,研究方向为结构动力学、建筑抗震、基础力学教育等,Email:xueyx@vip.163.com。
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