期刊文献+

Effect of vegetated-banks on local scour around a wing-wall abutment with circular edges 被引量:1

Effect of vegetated-banks on local scour around a wing-wall abutment with circular edges
原文传递
导出
摘要 Failure of bridges due to local scour in the vicinity of bridge abutments is a common occurrence. In this study, experiments under two different channel conditions were conducted to assess the impacts of vegetation on channel banks on local scour around a wing-wall abutment with circular edges. Some experiments were conducted in channel with vegetation on channel banks, and other experiments in channel without vegetation on channel bank. The flow velocity and Reynolds stress distributions in scour holes around a wing-wall abutment with circular edges were compared under these 2 different channel conditions. Results reveal that the vegetated-banks can reduce the time for achieving the equilibrium condition from 17 h to 9 h. Also, vegetated-bank channels can result in a significant decrease in the maximum scour depth from 0.084 m(for bare channel bank) to 0.00032 m. Additionally, around the abutment, vegetated-banks play a significant role in diminishing the Reynolds stress(RS) near the bed and removing negative values in RS distribution by weakening unfavorable pressure gradient and down-flow in the upstream of abutment. Failure of bridges due to local scour in the vicinity of bridge abutments is a common occurrence. In this study, experiments under two different channel conditions were conducted to assess the impacts of vegetation on channel banks on local scour around a wing-wall abutment with circular edges. Some experiments were conducted in channel with vegetation on channel banks, and other experiments in channel without vegetation on channel bank. The flow velocity and Reynolds stress distributions in scour holes around a wing-wall abutment with circular edges were compared under these 2 different channel conditions. Results reveal that the vegetated-banks can reduce the time for achieving the equilibrium condition from 17 h to 9 h. Also, vegetated-bank channels can result in a significant decrease in the maximum scour depth from 0.084 m(for bare channel bank) to 0.00032 m. Additionally, around the abutment, vegetated-banks play a significant role in diminishing the Reynolds stress(RS) near the bed and removing negative values in RS distribution by weakening unfavorable pressure gradient and down-flow in the upstream of abutment.
出处 《Journal of Hydrodynamics》 SCIE EI CSCD 2014年第3期447-457,共11页 水动力学研究与进展B辑(英文版)
关键词 local scour vegetated-banks wing-wall abutment circular edges Reynolds stress(RS) local scour,vegetated-banks,wing-wall abutment,circular edges,Reynolds stress(RS)
  • 相关文献

参考文献23

  • 1SUI J., HICKS F. and MENOUNOS B. Observations of riverbed scour under a developing hanging ice dam[J]. Canadian Journal of Civil Engineering, 2006, 33(2): 214-218.
  • 2WANG Jun,SUI Jue-yi,KARNEY Bryan W..INCIPIENT MOTION OF NON-COHESIVE SEDIMENT UNDER ICE COVER-AN EXPERIMENTAL STUDY[J].Journal of Hydrodynamics,2008,20(1):117-124. 被引量:16
  • 3CAROLLO F. G., FERRO V. and TERMINI D. Flow velocity measurements in vegetated channel[J]. Journal of Hydraulic Engineering, ASCE, 2002, 128(7): 664- 673.
  • 4KWAN T. F. A study of abutment scour[D]. Doctoral Thesis, Auckland, New Zealand: University of Auckland, 1988.
  • 5AHMED F., RAJARATNAM N. Observations on flow around bridge abutment[J]. Journal of Engineering Mechanics, 2000, 126(1): 51-60.
  • 6BARBHUIYA A. K., DEY S. Vortex flow field in a scour hole around abutments[J]. International Journal of Sediment Research, 2003, 18(4): 1-16.
  • 7BARBHUIYA A. K., DEY S. Local scour abutments: a review[J]. Sadhana, 2004, 29(5): 449-476.
  • 8AFZALIMEHR H. Effect of flow non-uniformity on velocity and turbulence intensities in flow over a cob- ble-bed[J]. Journal of Hydrological Processes, 2010, 24(3): 331-341.
  • 9NASIRI E., AFZALIMEHR H. and SINGH V. Effect of bed forms and vegetated-banks on velocity distributions and turbulent flow structure[J]. Journal of Hydrology Engineering, 201 1, 16(6): 495-507.
  • 10AFZALIMEHR H., ANCTIL F. Velocity distribution and shear velocity behavior of decelerating flow over a gravel-bed[J]. Journal of Canadian Civil Engineering, 1999, 26(4): 468-475.

二级参考文献10

  • 1HANIS D,ZABILANSKY L.Laboratory test of scour under ice: data and preliminary results. US Army CREEL Research Report, tr-04-09 . 2004
  • 2ASHTON G. D.Lake and river ice engineering[]..1986
  • 3LORANG M,HAUER R.Flow competence and streambed stability: an evaluation of technique and application[].Journal of the North American Benthological Society.2003
  • 4GOGUS M,TATINCLAUX J. C.Mean characteristics of asymmetric flows, application to flow below ice jams[].Canadian Journal of Civil Engineering.1981
  • 5CHEES. P,RAY S.Multiple resistance ice covered channels[].Proceedings of the International Symposium on Ice.1986
  • 6SUI J,WAND D,and KARNEY W. B.Sediment concentration and deformation of riverbed in a frazil jammed river reach[].Canadian Journal of Civil Engineering.2000
  • 7SUI J,KARNEY B,and WANG J.Coarsening of sediment concentration under ice-covered condition[].Proceedings of the th International Conference on River Sediment.2004
  • 8SUI J,JACKSON P,and FANG D. J.Investigations of the sediment budget of a reach of the Yellow River in the Loess Plateau[]..2005
  • 9SAYRE W. W,SONG G. B.Effects of ice covers on alluvial channel flow and sediment transport processes[].IIHR Report No University of Iowa.1979
  • 10Jueyi SUI,Ronald THRING,Bryan W. KARNEY,Jun WANG.EFFECTS OF RIVER ICE ON STAGE-DISCHARGE RELATIONSHIPS——A CASE STUDY OF THE YELLOW RIVER[J].International Journal of Sediment Research,2007,22(4):263-272. 被引量:4

共引文献15

同被引文献10

引证文献1

二级引证文献13

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部