Maximum Local Scour Depth at Bridge Piers under Unsteady Flow

The temporal effect of hydrograph on local scour depth is investigated under clear-water scour condition. By analyzing the characteristics of scour-depth evolutions at bridge piers for different rising hydrographs, a relation for estimating the maximum scour depth in uniform sediment is proposed. In the relation, the flow unsteadiness effect is taken into account by an unsteady flow parameter combining the peak-flow intensity and time-to-peak factors. For nonuniform sediment with d-sub-84 employed as the effective sediment size, this relation can yield reasonably good results of the maximum scour depth under rising hydrograph.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/8672558
• Supplemental Notes:
  • Abstract reprinted with permission from ASCE
• Authors:
  • Lai, Jihn-Sung
  • Chang, Wen-Yi
  • Yen, Chin-Lien
• Publication Date: 2009-7

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 609-614
• Serial:
  • Journal of Hydraulic Engineering
  • Volume: 135
  • Issue Number: 7
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9429
  • Serial URL: https://ascelibrary.org/journal/jhend8

Subject/Index Terms

• TRT Terms: Bridge piers; Hydrographs; Scour; Support piles
• Subject Areas: Bridges and other structures; Highways; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01133857
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 16 2009 8:04AM