IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
Log On
About IAHRDirectoryCommitteesMy IAHRNews & JournalseLibraryeShopEventsJoin IAHRWorld CongressDonate
spacer.gif
spacer.gif eLibrary
spacer.gif eLibrary
You are here : eLibrary : IAHR Asia Pacific Division Proceedings : 19th IAHR APD Congress, Hanoi 2014 : Session 1: ENVIRONMENTAL HYDRAULICS : EVALUATING HYDRODYNAMIC FORCES ACTING ON A BRIDGE UNDER FLOODING IN STEEP MEDIUM AND SMALL RIVERS
EVALUATING HYDRODYNAMIC FORCES ACTING ON A BRIDGE UNDER FLOODING IN STEEP MEDIUM AND SMALL RIVERS
Author : SHIRO MAENO (1), KEISUKE YOSHIDA (2) & RYUJI TANAKA (3)
Very heavy rains on July 28 2013 in Yamaguchi and Shimane prefectures caused severe damage to bridges. The extremely high flood discharge, coupled with the accumulation of large amounts of driftwood (logs, branches, and rootstock) caused the failure. This study examined the possibility of assessing the forces acting on a bridge using three-dimensional flow analysis in comparison with experimentally obtained results. Then hydrodynamic forces acting on the bridge under different water level conditions with or without driftwood accumulation were investigated. Numerical results show that the force acting on the bridge can be estimated using a three-dimensional flow simulation. Results clarified that the force acting on the bridge under an overflow condition of the bridge in a driftwood-accumulated state is 10 times greater than the force exerted in an ordinary flood discharge state.
File Size : 7,889,919 bytes
File Type : Microsoft Word Document
Chapter : IAHR Asia Pacific Division Proceedings
Category : 19th IAHR APD Congress, Hanoi 2014
Article : Session 1: ENVIRONMENTAL HYDRAULICS
Date Published : 10/03/2015
Download Now