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http://dx.doi.org/10.12989/sem.2008.28.1.001

Reliability considerations in bridge pier scouring  

Muzzammil, M. (Department of Civil Engineering, Aligarh Muslim University)
Siddiqui, N.A. (Department of Civil Engineering, Aligarh Muslim University)
Siddiqui, A.F. (Department of Civil Engineering, Aligarh Muslim University)
Publication Information
Structural Engineering and Mechanics / v.28, no.1, 2008 , pp. 1-18 More about this Journal
Abstract
The conventional design of bridge piers against scour uses scour equations which involve number of uncertain flow, sediments and structural parameters. The inherent high uncertainties in these parameters suggest that the reliability of piers must be assessed to ensure desirable safety of bridges against scour. In the present study, a procedure for the reliability assessment of bridge piers, installed in main and flood channels, against scour has been presented. To study the influence of various random variables on piers' reliability sensitivity analysis has been carried out. To incorporate the reliability in the evaluation of safety factor, a simplified relationship between safety factor and reliability index has been proposed. Effects of clear water (flood channel) and live bed scour (main channel) are highlighted on pier reliability. In addition to these, an attempt has also been made to explain the failure of Black mount bridge of New Zealand based on its pier's reliability analysis. Some parametric studies have also been included to obtain the results of practical interest.
Keywords
piers; scouring; bridges; reliability; FORM; Monte Carlo Simulation;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
Times Cited By Web Of Science : 3  (Related Records In Web of Science)
Times Cited By SCOPUS : 3
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1 Johnson, P.A. (1992), "Reliability-based pier scour engineering", J. Hydraul. Eng., ASCE, 118(10), 1344-1358   DOI
2 Melville, B.W. and Sutherland, A.J. (1988), "Design method for local scour at bridge piers", J. Hydraul. Eng., ASCE, 114(10), 1210-1226   DOI   ScienceOn
3 Siddiqui, N.A. and Ahmad, S. (2001), "Fatigue and fracture reliability of TLP tethers under random loading", Marine Struct., 14, 331-352   DOI   ScienceOn
4 Breusers, H.N.C., Nicollet, G. and Shen, H.W. (1977), "Local scour around cylindrical piers", J. Hydraul. Res., IAHR, 15(3), 211-252   DOI   ScienceOn
5 Chang, C., Tung, Y. and Yang, J. (1994), "Monte Carlo simulation for correlated variables with marginal distribution", J. Hydraul. Eng., 120(3), 313-331   DOI   ScienceOn
6 Coleman, S.E. and Melville, B.W. (2001), "Case study: New Zealand bridge scour experiences", J. Hydraul. Eng., ASCE, 127(7), 535-546   DOI   ScienceOn
7 Ghosn, M. and Johnson, P. (2000), "Reliability analysis of bridges under the combined effect of scour and Earthquakes", 8th ASCE Specialty Conference on Probability Mechanics and Structural Reliability, PMC 2000-164, 1-6
8 Yanmaz, A.M. (2003), "Reliability simulation of Scouring downstream of outlet facilities", Turkish J. Eng. Environ. Sci., 27, 65-71
9 Siddiqui, N.A. and Ahmad, S. (2003), "Reliability of TLP tethers under extreme tensions", Struct. Eng. Mech., 16(3), 317-326   DOI   ScienceOn
10 Sindel, R. and Rackwitz, R. (1998), "Problems and solution strategies in reliability updating", J. Offshore Mech. Arctic Eng., 120, 109-114   DOI   ScienceOn
11 Kothyari, U.C. (2003), "Scour around bridge piers", Proceedings, Workshop on Bridge Scour, River Training and Protection Works, India International Centre, New Delhi, India
12 Johnson, P.A. and Ayyub, B.M. (1992), "Assessing time-variant bridge reliability due to pier scour", J. Hydraul. Eng., ASCE, 118(6), 887-136   DOI
13 Huber, F. (1991), Updated Bridge Scour. American Society of Civil Engineers (ASCE), N.Y
14 Joint Committee on Structural Safety (JCSS). http://www.jcss.ethz.ch/
15 Melville, B.W. (1997), "Pier and abutment scour: integrated approach", J. Hydraul. Eng., ASCE, 123(2), 125-136   DOI   ScienceOn
16 Melville, B.W. and Coleman, S.E. (2000), Bridge Scour. Water Resources Publications, Littleton, Colorado
17 Muzzammil, M. (1992), "Characteristics of horseshoe vortex at cylindrical bridge piers", Ph.D. thesis, Indian Institute of Technology, Kanpur, India
18 Muzzammil, M. and Gangadhariah, T. (2003), "The mean characteristics of horseshoe vortex at a cylindrical pier", J. Hydraul. Res., IAHR, 41(3), 285-297   DOI   ScienceOn
19 Nowak, A.S. and Collins, K.R. (2000), Reliability of Structures. Mc Graw Hill, Singapore
20 Muzzammil, M., Gangadhariah, T. and Gupta, A.K. (2004), "An experimental investigations of bridge pier induced horse shoe vertex", Water Management, Institution of Civil Engineers, London, U.K
21 Richaradson, E.V., Harison, J.R. and Davis, R. (1993), "Evaluating scour at bridges", Hydraulic Engineering Circular, No. 18 (HEC-18), FHWA, US Department of Transportation, Washington, DC
22 Siddiqui, N.A. and Ahmad, S. (2000), "Reliability analysis against progressive failure of TLP tethers in extreme tension", Reliab. Eng. Syst. Safe., 68, 195-205   DOI   ScienceOn