Bridge Design Basic Wind Speed Based on the Joint Distribution of Wind Speed and Direction

Abstract:

Based on the method of separation of wind speed and direction variable, considering the wind direction frequency function, ascending order to calculate the probability of the actual distribution of the sample, extreme type Ⅰ (Gumbel) and three parameters of extreme type Ⅱ (Frechet) and extreme type Ⅲ (Weibull) probability distribution to fit the sample, this paper has analyzed the weather station observations of 34 consecutive years of the joint distribution of wind speed and direction near to a huge bridge, gained the basic design wind speed in different directions, comparatively analyzed the impact of the sampling interval of change on the basic wind speed as well. The results shows: wind speed in different directions at the same location or different sampling intervals samples of the wind speed sample may be subject to different types of extreme value distribution, should separately fitting; different wind direction frequency of extreme wind speed occurrence and the basic wind speed there are certain differences, taking into account the joint distribution of wind speed and direction is necessary to determine the design basic wind speed of the bridge, and will be conservative without considering the joint distribution; for the same sample wind speed matrix, the shorter the sampling intervals, the optimal distribution of the higher probability model fitting precision, the smaller the basic wind speed, the more economic and reasonable the results.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 805-812
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.805
• Online since: September 2011
• Authors: Zheng Wei Ye, Yi Qiang Xiang
• Keywords: Basic Wind Speed, Bridge Engineering, Extreme Value Distribution, Joint Distribution of Wind Speed and Direction, Statistic Analysis

References

[1] GB50009-2001. Load code for the design of building structures. Beijing, China Architecture & Building Press, 2006. (in Chinese)

[2] JTG/TD60-01-2004.Wind-resistent Design Specification for Highway Bridges[S]. Beijing: China Communications Press, 2004. (in Chinese)

[3] MC Williems B., Newmann M.M. and Sprevak D., The probability distribution of wind velocity and direction, Wind Engineering, Vol. 3, No.4, 1979, 267-273.

[4] Weber R., Estimator for the standard deviation of wind direction based on moments of Cartesian components, J. Appl, Meteorol 1991, 30, 1341-1353.

DOI: 10.1175/1520-0450(1991)030<1341:eftsdo>2.0.co;2

[5] G. R. Dargahi-Noubari, New method for prediction of extreme wind speeds, Journal of Engineering Mechanics, ASCE, Vol.115, 1989.

[6] E. Simiu, Multidirectional analysis of extreme wind speed data, Proc. of Fifth Engineering Mechanics Division Specialty conference, Laramie, WY, August 1984, 1196-1199.

[7] Ge Y. J., Xiang H. F., Statistical study for mean wind velocity in Shanghai area, Journal of Wind Engineering and Industrial Aerodynamics, 2002, 90(12-15), 1585-1599.

DOI: 10.1016/s0167-6105(02)00272-6

[8] Yang Yongxin, Ge Yaojun, Xiang Haifan, Statistic analysis of wind speed based on the joint distribution of wind speed and wind direction, Structural engineers, 2002(3), 29-36, 46. (in Chinese)

[9] Guan Qianqian, Distribution of extreme wind research in Chongqing district and the analysis of along-wind effects on high-rising building of various wind speed spectral, the master dissertation of Chongqing University, 2006. (in Chinese)

[10] Liu Jianxin, Ma Lin, Bai Hua, joint probability distribution of wind speed and direction of sightseeing tower in Hangzhouwan Bridge, Journal of Chang'an University(Natural science edition), 2008, 28(5), 53-57. (in Chinese)

[11] Xu Y. L., Chen J., Ng C. L. and Zhou H. J., Occurrence Probability of Wind-Rain-Reduced Stay Cable Vibration, Advance in Structural Engineering, 2008, 11(1), 53-69.

DOI: 10.1260/136943308784069487

[12] Chen Jun, Zhao Xudong, Analytical method of joint probability density function of wind speed and direction from parent population, Journal of disaster prevention and mitigation engineering, 2009, 29(1), 63-70. (in Chinese)

[13] Ge Yaojun, wind-induced vibration bridge structure reliability theory and its application, The PhD thesis of Tongji university, 1997. (in Chinese)

[14] Chen Zhaohui, Guan Qianqian, Simulation of asymptotic distributions of extreme wind speed in Chongqing using short-term wind speed records, Journal of Chongqing University(Natural science edition), 2006, 29(12), 88-92. (in Chinese)