Evaluation of Different Software Packages in Flow Modeling under Bridge Structures

Document Type : Research Paper

Author

Assistant Prof., Natural Resources Department, Yazd University

Abstract

This study is an independent and a comparative research concerning the accuracy, capability and suitability of three well-known packages ofISIS, MIKE11 and HEC-RAS as hydraulic river modeling software packages for modeling the flow through bridges. The research project was designed to assess the ability of each software package to model the flow through bridge structures. It was carried out using the data taken from experiments completed by a 22-meter laboratory flume at theUniversityofBirmingham. The flume has a compound cross section containing a main channel and two flood plains on either side. For this study a smooth main channel and a smooth floodplain have been assumed. Two types of bridges are modeled in this research; a multiple opening semi-circular arch bridge and a single opening straight deck bridge. For each bridge, two different simulations were carried out using two different upstream boundaries as low flow and high flow simulations. According to the results, all three packages were able to model arch and US BPR bridges but in some cases they presented different results. The highest water elevation upstream the bridge (maximum afflux) was the main parameter to be compared to the measured values.ISISand HEC-RAS (especially HEC-RAS) seem to be more efficient to model arch bridge. However, in some cases, MIKE 11 produced considerably higher results than those of the other two packages. To model USBPR bridge, all three packages produced reasonable results. However, the results by HEC-RAS are the best when the outputs are compared to the experimental data.

Keywords

References

1- Transport Association of Canada. (2004). Guide to bridge hydraulics, 2nd Ed., Thomas Telford Ltd Press.
2- Hamill, L. (1999). Bridge hydraulics: theory and practice, 1st Ed., E & FN Spon press.
3- زراتی، ر.، مترجم (1381). نقش عوامل هیدرولیکی در طراحی پلها، چاپ دوم، انتشارات دانشگاه صنعتی امیرکبیر.
4- Kwan, T.L., Yao-Hsien, H., and Yuh-Ju,C. (2006). “Bridge blockage and overbank  flow simulation using HEC-RAS in the keeling river during the 2001 Nari Typhoon.” J. of hydraulic engineering, 132 (3), 319-323.
5- Rodriguez, A., et al. (2000). “Hydraulic analyses for a new bridge over the Parana river Argentina.” International journal of sediment research, 18 (2), 166-175.
6- انتظاری، ع.ر.، مترجم (1381). هیدرولیک مهندسی عمران، چاپ اول، انتشارات نوپردازان.
7- مقصودی، ن.ا.، و کوچک زاده، ص. (1381). هیدرولیک کانال‌ها، چاپ چهارم، انتشارات دانشگاه تهران.
8- ابریشمی، ج.، و حسینی، س. م. (1377). هیدرولیک کانال‌های باز، چاپ ششم، انتشارات آستان قدس رضوی.
9-Atabay,S., and Knight, D.W. (2002). Bridge afflux experiments in compound channels, A report written and presented to the JBA consulting engineers and UK Environmental Agency.
10-Wallingfordand Halcrow. (2000). ISIS User Manual,UK.
11- Bradley, N. J. (1978). Hydraulics of bridge waterways, US Federal Highway Administration, Bridge Division,USA.
12- MIKE 11 User Manual. (2002). DHI,Denmark.
13-USCorps of Engineers. (2002). HEC-RAS UserManual,USA.
14-USCorps of Engineers. (1999). HEC-RAS HydraulicReference,USA.
Journal of Water and Wastewater; Ab va Fazilab ( in persian )
Volume 17, Issue 4 - Serial Number 4
Serial number:60
January 2007
Pages 29-40

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