Experimental analysis of additional aerodynamic effects caused by wind-driven rain on bridge main girder

Abstract

To study the additional aerodynamic effect on a bridge girder under the action of wind-driven rain, the rainfall similarity considering raindrop impact and surface water is first given. Then, the dynamic characteristics and the process of vortex and flutter generation of the segment models under different rain intensities and angles of attack are tested by considering several typical main girder sections as examples. The test results indicate that the start and end wind speeds, interval length and number of vortex vibrations remain unchanged when it is raining, rainfall will reduce the wind-induced vortex response. When test rain intensity is large, the decrease of amplitude is obvious. However, after considering the rain intensity similarity in this study, all of actual maximum rain intensities after conversion approach the domestic extreme rain intensity of approximately 709 mm/h. It can be observed that rainfall has a limited influence on the dynamic characteristics of the structure and vortex vibration response. When the test rain intensity is 120 mm/h, the critical wind speed of the model flutter increases by 20%–30%. However, after considering the rain intensity similarity ratio, the influence of rainfall on the wind-induced flutter instability of the bridge girder may be ignored.

Keywords

bridge engineering / main girder / wind-driven rain / similarity law / aerodynamic effect

References

[1] RhodeR VSome effects of rainfall on flight of airplanes and on instrument indication [M], 1941, Washington, Technical Report Archive & Image Library, 115

[2] BilaninA J. Scaling laws for testing airfoils under heavy rainfall [J]. Journal of Aircraft, 1987, 24(1): 31-37

[3] CaoY-H, WuZ-L, XuZ-Y. Effects of rainfall on aircraft aerodynamics [J]. Progress in Aerospace Sciences, 2014, 71: 85-127

[4] ChoiE C C. Determination of wind-driven-rain intensity on building faces [J]. Journal of Wind Engineering and Industrial Aerodynamics, 1994, 51(1): 55-69

[5] ChoiE C C. Wind-driven rain and driving rain coefficient during thunderstorms and non-thunderstorms [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2001, 89(3–4): 293-308

[6] SurryD, InculetD R, SkerljP F, et al.. Wind, rain and the building envelope: A status report of ongoing research at the University of Western Ontario [J]. Journal of Wind Engineering and Industrial Aerodynamics, 1994, 53(1–2): 19-36

[7] BlockenB, CarmelietJ. A review of wind-driven rain research in building science [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2004, 92(13): 1079-1130

[8] BlockenB, DeromeD, CarmelietJ. Rainwater runoff from building facades: A review [J]. Building and Environment, 2013, 60: 339-361

[9] HuangS H, LiQ S. Numerical simulations of wind-driven rain on building envelopes based on Eulerian multiphase model [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2010, 98(12): 843-857

[10] HuangS H, LiQ S. Large eddy simulations of wind-driven rain on tall building facades [J]. Journal of Structural Engineering, 2012, 138(8): 967-983

[11] BaheruT, Gan ChowdhuryA, BitsuamlakG, et al.. Simulation of wind-driven rain associated with tropical storms and hurricanes using the 12-fan Wall of Wind [J]. Building and Environment, 2014, 76: 18-29

[12] TianL, ZengY-J. State-of-the-art review of structural resistance to wind-rain loads [J]. Structural Engineers, 2016, 32(4): 197-204(in Chinese)

[13] GaoQ-F, DongH, DengZ-W, et al.. Three-field coupling analysis for large-scale wind turbine with wind-rain-structure [J]. Journal of Central South University (Science and Technology), 2016, 47(3): 1011-1016(in Chinese)

[14] FuX, LiH-N. Dynamic analysis of transmission tower-line system subjected to wind and rain loads [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2016, 157: 95-103

[15] LiuM, LiQ S, HuangS-H. Large eddy simulation of wind-driven rain effects on a large span retractable roof stadium [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2019, 195: 104009

[16] HeX-H, LiH. Review of aerodynamics of high-speed train-bridge system in crosswinds [J]. Journal of Central South University, 2020, 27(4): 1054-1073

[17] HikamiY, ShiraishiN. Rain-wind induced vibrations of cables stayed bridges [J]. Journal of Wind Engineering and Industrial Aerodynamics, 1988, 29(1–3): 409-418

[18] MatsumotoM, YagiT, SakaiS, et al.. Steady wind force coefficients of inclined stay cables with water rivulet and their application to aerodynamics [J]. Wind and Structures, 2005, 8(2): 107-120

[19] GuM, DuX Q, LiS Y. Experimental and theoretical simulations on wind-rain-induced vibration of 3-D rigid stay cables [J]. Journal of Sound and Vibration, 2009, 320(1–2): 184-200

[20] NiY Q, WangX Y, ChenZ Q, et al.. Field observations of rain-wind-induced cable vibration in cable-stayed Dongting Lake Bridge [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2007, 95(5): 303-328

[21] LiuQ-K. Study on the mechanism of rain-wind induced vibration of cables on cable-stayed bridge using les [J]. Engineering Mechanics, 2007, 24(9): 134-139(in Chinese)

[22] LiH, ChenW-L, XuF, et al.. A numerical and experimental hybrid approach for the investigation of aerodynamic forces on stay cables suffering from rain-wind induced vibration [J]. Journal of Fluids and Structures, 2010, 26(7–8): 1195-1215

[23] ChengZ-QThe bridge wind engineering [M], 2005, Beijing, China Communication Press, 1-200(in Chinese)

[24] GuM, XuS-Z. An experimental study on the flutter derivatives of a thin plate model subjected to wind and rain [J]. China Civil Engineering Journal, 2004, 37(10): 73-77(in Chinese)

[25] XinD-B, LiH, WangL, et al.. Experimental study on static characteristics of the bridge deck section under simultaneous actions of wind and rain [J]. Journal of Wind Engineering and Industrial Aerodynamics, 2012, 107–108: 17-27

[26] XinD-B, LiH, WangL, et al.. Experimental study of rain effects on vortex shedding of long span bridge girders [J]. Advances in Structural Engineering, 2012, 15(10): 1793-1799

[27] XinD-B, WangL, OuJ-P, et al.. Experimental study on the flutter stability of long-span bridges subjected to wind and rain [J]. China Civil Engineering Journal, 2012, 45(3): 110-115(in Chinese)

[28] HuJStudy on the in-field measured data, wind rain action and wind-induced fatigue of a long-span suspension bridge [D], 2012, Dalian, School of Civil Engineering, Dalian University of Technology, 5682(in Chinese)

[29] ZhaoL, GeY-J, WuZ-K, et al.. Theoretic and testing investigation of wind-rain coupling loads on bridges and structures [J]. Journal of Vibration Engineering, 2014, 27(4): 507-517(in Chinese)

[30] HuangS-H, LiQ-S, LiuM, et al.. Numerical simulation of wind-driven rain on a long-span bridge [J]. International Journal of Structural Stability and Dynamics, 2019, 19(12): 1950149

[31] TangS-Y, LiH-N. Aeroelastic modeling of transmission towers and similarity ratio for wind-rain loads [J]. Journal of Vibration and Shock, 2011, 308199-202(in Chinese)

[32] MarshallJ S, PalmerW M K. The distribution of raindrops with size [J]. Journal of Meteorology, 1948, 5(4): 165-166

[33] GunnR, KinzerG D. The terminal velocity of fall for water droplets in stagnant air [J]. Journal of Meteorology, 1949, 6(4): 243-248

[34] JiT-J, HuangX-M, LiuQ-Q, et al.. Prediction model of rain water depth on road surface [J]. Journal of Traffic and Transportation Engineering, 2004, 4(3): 1-3(in Chinese)

[35] LuoY-Z, ChenZ-Q, HanY. Subsection extended order iterative least square method for aerodynamic derivative identifications of eccentric bridge section models [J]. Engineering Mechanics, 2007, 24(4): 104-112(in Chinese)

[36] HuP, HanY, CaiC S, et al.. Wind characteristics and flutter performance of a long-span suspension bridge located in a deep-cutting gorge [J]. Engineering Structures, 2021, 233111841