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Reliability analysis of composite channels using first order approximation and Monte Carlo simulations

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Title Reliability analysis of composite channels using first order approximation and Monte Carlo simulations
 
Creator ADARSH, S
REDDY, MJ
 
Subject Composite channels
First order second moment method
Monte Carlo simulation
Reliability
Uncertainty modeling
CONSTRAINED OPTIMAL-DESIGN
OPEN DRAINAGE CHANNELS
TRAPEZOIDAL CHANNELS
RISK ANALYSIS
UNCERTAINTY
FLOW
SECTION
 
Description Artificial open channels being costlier infrastructure, their design should ensure reliability along with optimality in project cost. This paper presents reliability analysis of composite channels, considering uncertainty associated with various design parameters such as friction factors, longitudinal slope, channel width, side slope, and flow depth. This study also considers uncertainties of watershed characteristics, rainfall intensity and drainage area to quantify the uncertainty of runoff. For uncertainty modeling, the advanced first order second moment method and Monte Carlo simulation are used and it is found that the results by both approaches show good agreement. Then, a reliability index that can be used to design a composite channel to convey design discharge for a specified risk or probability of failure is presented, and its sensitivity with different channel design parameters are analyzed. To validate the effectiveness of the present approach, the reliability values and safety factors for variable system loading scenario are obtained under static and dynamic environment. The sensitivity analysis shows that flow depth and bed width are the most influencing parameters that affect the safety factor and reliability.
 
Publisher SPRINGER
 
Date 2014-10-17T06:14:25Z
2014-10-17T06:14:25Z
2013
 
Type Article
 
Identifier STOCHASTIC ENVIRONMENTAL RESEARCH AND RISK ASSESSMENT, 27(2)477-487
http://dx.doi.org/10.1007/s00477-012-0663-0
http://dspace.library.iitb.ac.in/jspui/handle/100/16157
 
Language en