Paper Information

Journal:   JOURNAL OF WATER AND SOIL (AGRICULTURAL SCIENCES AND TECHNOLOGY)   JANUARY-FEBRUARY 2017 , Volume 30 , Number 6 #A0043; Page(s) 1860 To 1873.
 
Paper: 

SIMULATION OF FLOW PATTERN AROUND INCLINED BRIDGE GROUP PIER USING FLOW-3D SOFTWARE

 
 
Author(s):  JAFARI M., AYYOUBZADEH S.A.*, ESMAEILI VARAKI M., ROSTAMI M.
 
* WATER STRUCTURES ENGINEERING DEPARTMENT, TARBIAT MODARES UNIVERSITY, TEHRAN
 
Abstract: 

Introduction: Bridges are certainly one of the most important structures but costly service elements in a transport system. The bridges are very required to access the damaged areas in emergency situations such as floods and earthquakes. Scour around the foundations of bridge piers exposed to the flowing water than can destroy the bridge itself is a subject of major concern. Flow pattern is known as responsible for all changes in stream bed. Any obstacle in the channel can form new flow patterns causing additional shear stress exerted on the bed than the equilibrium condition of the absence of the obstacle. Appropriate shaping of flow pattern and proper selecting of pier geometry and the location of bridge piers can be one of the proper methods in reduction of scour amount which is the main subject of the present study.
Materials and Methods: Inclined bridge group pier is a type of bridges with modern geometry based on development in building technology of structures. Many of these bridges have been built all around the world and the 8th bridge built crossing the Karun River in Ahvaz is a sample of the Iranian ones considered in this research. Hydrodynamic behavior of flow is investigated around the inclined bridge group pier settled on foundation using the FLOW-3D numerical model. Inclined bridge group pier investigated in this study, includes two rectangular piers which are 2.5 cm long and 3.5 cm wide and set in an angle of 28 degree on rectangular foundation which is 16 cm long and 10 cm wide and installed in three different foundation levels namely at, above and below the bed levels. The physical model of prototype pier considered in this study was constructed to the scale of 1: 190 of the Ahvaz 8th bridge. In order to verify the accuracy of the numerical model, velocity data obtained from image processing technique were used.

 
Keyword(s): AHVAZ 8TH BRIDGE, FLOW PATTERN, FOUNDATION LEVEL, IMAGE PROCESSING METHOD, INCLINED BRIDGE GROUP PIER, NUMERICAL MODEL FLOW-3D
 
References: 
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