Test of the Influence of Scour Depth on Modal Parameters of Simple-Supported Bridge

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Journal of Vibration and Shock ›› 2016, Vol. 35 ›› Issue (14) : 145-150.

LIANG Fayun 1,2 WANG Chen1,2 JIA Chenyue 1,2 WANG Yu1,2

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Abstract

Many failures of bridges are caused by scour around the foundation，which enlarges the scour depth and reduce the bearing capacity of the piers. However, the monitoring of the scour is difficult according to practical experience. In the system of simple supported bridge，the scour depth also has its influence on the stiffness and modal parameters of the bridges. Based on the theory of modal parameters and test of a simple supported bridge, the relationship between depth and dynamic characteristics and the regularity of the bridge are discussed with instant impulse. In conclusion, the torsional and lateral bending modes are vulnerable to the scour, and both of them decreases with the increase of scour depth. The lateral bending mode (low-frequency mode) decreases faster than the torsional mode (high-frequency mode). When the scours around two piers are different, they can be judged by the amplitude of the peak frequency. The scour process can be detected by the analysis according to the modal modes and its amplitude.

Key words

scour depth / modal parameter / simple-supported bridge / model test / finite element analysis

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LIANG Fayun 1,2 WANG Chen1,2 JIA Chenyue 1,2 WANG Yu1,2. Test of the Influence of Scour Depth on Modal Parameters of Simple-Supported Bridge[J]. Journal of Vibration and Shock, 2016, 35(14): 145-150

References

[1] Lagasse PF, Clopper PE, Zevenbergen LW, et al. NCHRP Report 593: Countermeasures to protect bridge piers from scour [R]. Transportation Research Board, Washington DC, USA, 2007.
[2] Wardhana K, Hadipriono FC. Analysis of recent bridge failures in the United States [J]. Journal of Performance of Constructed Facilities, ASCE, 2003, 17(3): 144-150.
[3] 中华人民共和国行业标准. 公路工程水文勘测设计规范(JTG C30-2002) [S]. 中华人民共和国交通部, 2002.
National Standard of the People’s Republic of China. Hydrological Specifications for Survey and Design of Highway Engineering (JTG C30-2002) [S]. Ministry of Communication of People’s Republic of China.
[4] Melville BW, Coleman SE. Bridge Scour [M]. Water Resources Publications, Colorado, USA, 2000.
[5] Liang FY, Bennett CR, Parsons RL, et al. A literature review on behavior of scoured piles under bridges [C]. In: the 2009 International Foundation Congress and Equipment Expo, Orlando, GSP186, ASCE, 2009:482-489.
[6] Shaji T, Somayaji S, Mathews MS. Ultrasonic pulse velocity technique for inspection and evaluation of timber [J]. Journal of materials in civil engineering, 2000, 12(2): 180-185.
[7] Douglas RA, Holt JD. Determining length of installed timber pilings by dispersive wave propagation methods [R]. Center for Transportation Engineering Studies, North Carolina State University, 1993.
[8] Lo KF, Ni SH, Huang YH, et al. Measurement of unknown bridge foundation depth by parallel seismic method [J]. Experimental Techniques, 2009, 33(1): 23-27.
[9] Watanabe S, Samizo M, Fuchiwaki A, et al. Evaluation of the Structural Integrity of Bridge Pier Foundations under Flood Condition by the Natural Frequencies Measured with a Micro-tremor [J]. RTRI Report, 2007, 21(1): 31-36.
[10] Ko YY, Lee WF, Chang WK. Scour evaluation of bridge foundations using vibration measurement [C]. International Conference on Scour and Erosion 2010: 884-893.
[11] 张达德, 陈柏麟, 黄钢. 冲刷桥墩基础的HHT振动频谱特性分析与判读研究[J]. 岩土力学, 2010, 31(7): 2241-2246.
Zhang Da-de, Chen Bo-lin, Huang Gang. Characteristics analysis and judgment of vibrating frequency for scoured pier foundation by Hilbert Huang transfotm [J]. Rock and Soil Mechanics, 2010, 31 (7): 2241-2246. (in Chinese)
[12] 梁发云, 李彦初, 陈海兵. 冲刷作用下单桩循环加载特性的模型试验[J]. 同济大学学报, 2014, 42(10): 1511-1515
Liang Fa-yun, Li Yan-chu, Chen Hai-bing. Influence of scour depth on vertically cyclic behaviors of singe pile with model tests [J]. Journal of Tongji University, 2014, 42(10):1511-1515
[13] 贾承岳, 梁发云, 王玉. 冲刷深度对单桩自振频率影响的试验分析初探[J]. 结构工程师，2013,29(1): 114-117.
Jia Cheng-yue, Liang Fa-yun, Wang Yu. A preliminary Investigation on the Influences of Scour Depth on Natural Frequencies of a Single Pile [J]. Structural Engineering, 2013,29(1): 114-117.
[14] 王玉, 贾承岳, 梁发云, 姚笑青. 桥墩不均匀冲刷对简支桥模态影响的数值模拟. 岩土工程学报, 2013, 35(Sup.2): 779-782.
Wang Yu, Jia Cheng-yue, Liang Fa-yun, Yao Xiao-qing. Numerical simulation of influence of non-uniform scour depth on modes of simply supported bridge [J]. Chinese Journal of Geotechnical Engineering, 2013, 35(Sup.2): 779-782.
[15] 姚锦宝, 夏禾, 战家旺. 铁路桥梁基础受冲刷对桥墩模态特性的影响分析[J]. 中国铁道科学, 2008, 29(1): 31-35.
Yao Jin-bao, Xia He, Zhan Jia-wang. Analysis on the Influence of the Bridge Foundation under Scouring on the Natural Vibration Characteristics of Piers [J]. China Railway Science, 2008,29(1):31–35.
[16] 卢中一, 高正荣, 吴丽华, 等. 南京长江三桥桥墩基础的局部冲刷[J]. 人民长江, 2005, 36(10): 48-50.
LU Zhongyi, GAO Zhengrong, WU Lihua, and et al. Local scour at pier foundation of Nanjing Yangtze 3rd bridge [J]. Wuhan: Yangtze River, 2005, 36(10): 48-50.
[17] 伍冬领, 邢艳, 谢晓波, 等. 钱江四桥桥墩局部冲刷试验研究[J]. 桥梁建设, 2005, (2): 19-21.
WU Donglin, XING Yan, XIE Xiaobo, and et al. Experimental study of local scour at piers of the Qianjiang 4th bridge [J]. Wuhan: bridge construction, 2005, (2): 19-21..