Experimental study for determination of collar dimensions around bridge pier

Jahangirzadeh, A. and Akib, S. (2015) Experimental study for determination of collar dimensions around bridge pier. Baltic Journal of Road and Bridge Engineering, 10 (1). pp. 89-96. ISSN 1822-427X

Full text not available from this repository. (Request a copy)
Official URL: http://www.bjrbe.vgtu.lt/volumes/en/volume10/numbe...

Abstract

The shape and size of a collar is important to maximize its effect as a scour countermeasure. Current research shows that the depth of the scour hole is decreased by using rectangular collars around circular piers. This study determined the approximate optimum dimensions for rectangular collars to minimize the temporal trend of scouring around a pier model. Effects of different sizes of rectangular collars on a model pier were investigated both at the upstream and downstream of the flume. It was observed that irrespective of the rectangular collar dimensions the upstream and the downstream were estimated to be 0.86 and 1.42, respectively. The optimum collar width was estimated to be 2.8 times the diameter of the pier. By using this optimized collar dimension, the non-dimensional depth of scour reached a min value of 0.034 at 72 h. The reduction percentage of the scour depth reached 98 at 72 h.

Item Type: Article
Additional Information: ISI Document Delivery No.: CF7TC Times Cited: 0 Cited Reference Count: 30 Cited References: Akib S, 2014, J HYDROL HYDROMECH, V62, P108, DOI 10.2478/johh-2014-0015 Akib S, 2011, BALT J ROAD BRIDGE E, V6, P107, DOI 10.3846/bjrbe.2011.15 BAKER CJ, 1980, J HYDRAUL RES, V18, P1 CHIEW YM, 1987, J HYDRAUL RES, V25, P15 CHIEW YM, 1992, J HYDRAUL ENG-ASCE, V118, P1260, DOI 10.1061/(ASCE)0733-9429(1992)118:9(1260) DARGAHI B, 1990, J HYDRAUL ENG-ASCE, V116, P1197, DOI 10.1061/(ASCE)0733-9429(1990)116:10(1197) Deng L, 2010, PRACTICE PERIODICAL, V15, P125, DOI DOI 10.1061/(ASCE)SC.1943-5576.0000041 Ettema R., 1980, 216 U AUCKL DEP CIV Gaudio R, 2012, J HYDRAUL RES, V50, P35, DOI 10.1080/00221686.2011.649548 Jahangirzadeh A., 2014, PLOS ONE, V9, P1 Khosronejad A, 2012, ADV WATER RESOUR, V37, P73, DOI 10.1016/j.advwatres.2011.09.013 Kumar V, 1999, J HYDRAUL ENG-ASCE, V125, P1302, DOI 10.1061/(ASCE)0733-9429(1999)125:12(1302) Laursen E. M., 1956, BULLETIN, V4 Link O, 2008, INT J SEDIMENT RES, V23, P258, DOI 10.1016/S1001-6279(08)60023-2 Mashahir MB, 2010, J HYDRAUL ENG-ASCE, V136, P183, DOI 10.1061/(ASCE)HY.1943-7900.0000145 Melville BW, 1997, J HYDRAUL ENG-ASCE, V123, P125, DOI 10.1061/(ASCE)0733-9429(1997)123:2(125) Meyer-Peter E., 1984, P 2 M INT ASS HYDR S Moncada-M AT, 2009, J HYDRAUL RES, V47, P119, DOI 10.3826/jhr.2009.3244 Motamedi A, 2010, J HYDROL ENG, V15, P892, DOI 10.1061/(ASCE)HE.1943-5584.0000266 Neill C. R., 1973, GUIDE BRIDGE HYDRAUL Raudkivi A. J., 1998, LOOSE BOUNDARY HYDRA RAUDKIVI AJ, 1983, J HYDRAUL ENG-ASCE, V109, P338 Sheppard DM, 2006, J HYDRAUL ENG-ASCE, V132, P635, DOI 10.1061/(ASCE)0733-9429(2006)132:7(635) Shirole A. M., 1991, P 3 BRIDG ENG C 10 1 Tafarojnoruz A, 2010, J HYDRAUL RES, V48, P441, DOI 10.1080/00221686.2010.491645 Tafarojnoruz A, 2012, ACTA GEOPHYS, V60, P1076, DOI 10.2478/s11600-012-0040-x Thomas Z, 1967, P 12 INT ASS HYDR RE Zarrati AR, 2006, J HYDRAUL ENG-ASCE, V132, P154, DOI 10.1061/(ASCE)0733-9429(2006)132:2(154) Zarrati AR, 2010, INT J SEDIMENT RES, V25, P313, DOI 10.1016/S1001-6279(10)60048-0 Zarrati AR, 2004, J HYDRAUL RES, V42, P97, DOI 10.1080/00221686.2004.9641188 Jahangirzadeh, Afshin Akib, Shatirah Engineering, Faculty /I-7935-2015 Engineering, Faculty /0000-0002-4848-7052 University of Malaya UM.C/625/1/HIR/61, H-16001-00-D000061 Financial support by the high impact research grants from the University of Malaya (UM.C/625/1/HIR/61, account number: H-16001-00-D000061) is gratefully acknowledged. 0 VILNIUS GEDIMINAS TECH UNIV VILNIUS BALT J ROAD BRIDGE E
Uncontrolled Keywords: Bridge pier model, scour, rectangular collar, collar width, downstream collar length, upstream collar length, flow-altering countermeasures, local scour, cylindrical piers, reduction, riprap,
Subjects: T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 03 Mar 2016 01:12
Last Modified: 03 Mar 2016 01:12
URI: http://eprints.um.edu.my/id/eprint/15666

Actions (login required)

View Item View Item