Influencing factors of dynamic characteristics and onset wind speed of the vortex induced vibration of local members in a long span steel truss arch bridge

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (6) : 174-181.

TI Zilong,LI Yongle,XU Xinyu

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Abstract

In longspan steel truss arch bridges, some of the slender local members are sensitive to wind forces. In order to investigate the onset wind speed of the vortexinduced vibration of local members in longspan steel truss arch bridges, a longspan steel truss bridge built in the coastal region was regarded as an engineering example. Based on the finite element method (FEM), a modelling approach called “zerodensity”, considering the stiffness of the entire bridge, the structural internal force and the length of gusset plates, was proposed to calculate the natural frequency of the local members. Based on the method of computational fluid dynamics (CFD), the aerodynamic characteristics of the sections of the local members were calculated and the lockin wind speed of vortexinduced vibration of the local members were analyzed and discussed. It is shown that using the “zerodensity” approach gives reasonable results of the dynamic characteristics of local members. The boundary conditions, structural internal force and length of gusset plates have notable influences on the natural frequency and lockin wind speed of the local members and using rigid boundary conditions in previous studies may overestimate the lockin wind speed, which may cause unsecurity.

Key words

long-span steel truss arch bridge / wind-induced vibration of bridge / vortex-induced vibration / natural frequency / local member

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TI Zilong,LI Yongle,XU Xinyu. Influencing factors of dynamic characteristics and onset wind speed of the vortex induced vibration of local members in a long span steel truss arch bridge[J]. Journal of Vibration and Shock, 2018, 37(6): 174-181

References

[1]孙海涛.大跨度钢桁架拱桥关键问题研究[D].同济大学,2007.
[1]Sun Haitao. Study on key problems of long span steel truss arch bridge [D]. Tongji University, 2007
[2]易伦雄. 南京大胜关长江大桥大跨度钢桁拱桥设计研究[J]. 桥梁建设,2009,05:1-5.
[2]Lunxiong. Design of Nanjing Dashengguan Yangtze River bridge large span steel truss arch bridge [J]. Journal of bridge construction, 2009,05:1-5. (in Chinese).
[3]王福敏,徐伟. 重庆朝天门长江大桥主桥结构体系研究[J]. 公路交通技术,2005,S1:23-28.
[3]Wang Fumin, Xu Wei. Study on structural system of main bridge of Chaotianmen Chongqing Yangtze River bridge[J]. Technology of highway and transport, 2005, S1:23-28. (in Chinese).
[4]李杏平,李爱群,王浩,赵耕文. 基于长期监测数据的苏通大桥桥址区风特性研究[J]. 振动与冲击,2010,10:82-85+251.
[4]Li Xingping, Li Aiqun, Wang Hao, Zhao Gengwen. Study on wind characteristics of the bridge site of Su Tong Bridge Based on long-term monitoring data [J]. Journal of vibration and shock, 2010,10:82-85+251. (in Chinese).
[5]欧阳克俭,陈政清,韩艳,李红利. 桥面中央开口悬索桥涡激共振与制涡试验研究[J]. 振动与冲击,2009,07:199-202+223.
[5]Ouyang Kejian,Chen Zhengqing, Han Yan, Li Hongli. The central opening suspension bridge vortex resonance and experimental study on the vortex [J]. Journal of vibration and shock, 2009,07:199-202+223. (in Chinese).
[6]Rudge D, Fei C Y, Rudge D, et al. Response of structural members to wind-induced vortex shedding[J]. Massachusetts Institute of Technology, 1991.
[7]汪睿,吴刚,杨树耕. 导管架局部杆件固有频率计算实验研究[J]. 中国海洋平台,2012,04:38-43.
[7]Wang Rui, Wu Gang, Yang Yang. Experimental study on the natural frequency calculation of the local bar of the jacket [J]. China offshore platform, 2012,04:38-43. (in Chinese).
[8]张著名. 大跨度钢桁架拱桥局部杆件稳定问题研究[D].湖南大学,2007.
[8]Zhang Zhuming. Research on the stability of the local bar in the large span steel truss arch bridge [D]. Hunan University, 2007
[9]李晓猛. 岸边集装箱起重机圆截面杆件风致振动及控制的研究[D].上海海事大学,2004.
[9]Li Xiaomeng. The quayside container crane round cross-section rod and the wind-induced vibration control of [D]. Shanghai Maritime Univeristy, 2004
[10]邓洪洲,李峰,陈强,吴昀. 输电塔典型节点钢管杆件动力特性研究[J]. 振动与冲击,2009,10:60-63+125+225.
[10]Deng Hongzhou, Li Feng, Chen Jiang, Wu Yun. Study on dynamic characteristics of typical joints of the tube rod transmission tower[J]. Journal of vibration and shock, 2009,10:60-63+125+225. (in Chinese).
[11]邓育林,彭天波,李建中,吉林,冯兆祥,阮静. 大跨度三塔悬索桥动力特性及抗震性能研究[J]. 振动与冲击,2008,09:105-110+186.
[11]Deng Yulin, Peng Tianbo, Li Jianzhong, Jilin, Feng Zhaoxiang, Ruan Jing. Dynamic characteristics and seismic performance of the large span three tower suspension bridge[J]. Journal of vibration and shock, 2008,09:105-110+186. (in Chinese).
[12]张花. 大跨度钢—混组合桁架节点刚度研究[D].中南大学,2012.
[12]Zhang Hua. Study on joint stiffness of large span steel and concrete composite truss[D]. Central South University, 2012
[13]陈政清. 桥梁风工程[M]. 北京: 人民交通出版社,2005.
Chen Z Q. Wind engineering on bridges[M].Beijing:
China Communications Press, 2005.
[14]詹昊,方秦汉,李万平. 钢桁拱桥吊杆涡激振动仿真分析[J]. 中国铁道科学,2009,02:31-37.
[14]Zhan Hao, Fang Qin and Han, Li Wanping. Simulation and analysis of vortex induced vibration of steel truss arch bridge [J]. China Railway Science, 2009,02:31-37. (in Chinese).