Reliability Concepts in Reservoir Design

1989 ◽  
Vol 20 (4-5) ◽  
pp. 231-248 ◽  
Author(s):  
Erich J. Plate
Keyword(s):  
Water Resources ◽  
Reliability Analysis ◽  
Conceptual Models ◽  
Dam Failure ◽  
Figures Of Merit ◽  
Irrigation Reservoir ◽  
Modes Of Failure ◽  
Reservoir Design ◽  
General Reliability ◽  
Operational Failure

The case of a dam for an irrigation reservoir is used as an example to illustrate the different modes of failure of a water resources system. The types of failure to which a dam can be subjected are described in the first section of the paper, in terms of a framework of general reliability analysis. Two applications are considered: the case of operational failure, illustrated by means of an irrigation reservoir for arid countries, and the case of dam failure due to overtopping. Conceptual models are given which permit the inclusion of reliability and other figures of merit into both operation and safety analysis.

scholarly journals A study on reliability analysis for water resources systems.

1987 ◽  
pp. 91-100
Author(s):  
Toshiharu KOJIRI ◽  
Shuichi IKEBUCHI ◽  
Takeshi IIJIMA
Keyword(s):  
Water Resources ◽  
Reliability Analysis ◽  
Water Resources Systems

Study on Warning Methods of Irrigation Reservoirs

2013 ◽  
Vol 353-356 ◽  
pp. 2492-2495
Author(s):  
Xiao Na Guo ◽  
Sheng Le Cao ◽  
Cui Song Yu ◽  
Cong Qi Zheng ◽  
Jun Wang ◽  
...  
Keyword(s):  
Sustainable Development ◽  
Water Resources ◽  
Early Warning ◽  
Quantitative Method ◽  
Total Water ◽  
Resources Management ◽  
Development Control ◽  
Flood Season ◽  
Irrigation Reservoir ◽  
Red Line

Reservoir warning is an important part of the red line of water resources development control. Based on the red line of total water in three red lines, this paper put forward firstly the quantitative method for determining water supply line and warning area of irrigation reservoirs, and presented the definition and method of irrigation reservoir warning. Taking the Douyazi reservoir in Jiaonan for example, early warning results based on warning period, which was divided into three months and non-flood season, were given. It provided technical support for implementation of the most strict resources management and sustainable development of the economic society.

A Systematic Approach to the Reliability Analysis of an n-Unit Warm Standby System With k-Repair Facility

2009 ◽  
Author(s):  
Yu Pang ◽  
Hong-Zhong Huang ◽  
Yu Liu ◽  
Min Xie
Keyword(s):  
Reliability Analysis ◽  
Systematic Approach ◽  
Previous Analysis ◽  
Process Theory ◽  
Repairable System ◽  
Standby System ◽  
General Reliability ◽  
Repair Facility ◽  
Traditional Approaches ◽  
Warm Standby

A systematic reliability analysis of n-unit warm standby repairable system with k-repair facility is presented in this paper. Traditional approaches are extended under the following assumptions: (1) the working lifetime, the standby lifetime, and the repair time of failed units are represented as exponential distribution; and (2) the repair of failed units are as good as new after repair. In this paper, a general reliability analysis of an n-unit warm standby repairable system with k-repair facility is presented. Based on previous analysis, the steady-state reliability and the average availability of the system are formulated using the Markov process theory and Laplace transform.

Passive System Reliability Modeling of the Combination of Failure Modes

2016 ◽  
Author(s):  
Luciano Burgazzi
Keyword(s):  
Reliability Analysis ◽  
Failure Mode ◽  
System Reliability ◽  
Probabilistic Models ◽  
Failure Modes ◽  
Natural Circulation ◽  
Heat Transfer Process ◽  
Passive System ◽  
Modes Of Failure ◽  
Degradation Failure

Innovative probabilistic models to extend the reliability analysis of passive systems under different modes of failure are proposed. The prevailing failure mode on the system can be predicted through the failure probability assessment on each specific mode. A realistic case is presented to analyze a passive system with two kinds of major failure modes — natural circulation stoppage due to e.g., isolation valve closure (a catastrophic failure) and heat transfer process degradation due to e.g., deposit thickness on component surfaces (a degradation failure). Modeling of each individual failure mode together with system reliability analysis is presented and results are discussed.

The application of probabilistic climate change projections: a comparison of methods of handling uncertainty applied to UK irrigation reservoir design

2014 ◽  
Vol 5 (4) ◽  
pp. 652-666 ◽  
Author(s):  
Michael Green ◽  
Edward Keith Weatherhead
Keyword(s):  
Climate Change ◽  
Probability Distributions ◽  
Latin Hypercube Sampling ◽  
Probabilistic Methods ◽  
Climate Projections ◽  
Climate Change Projections ◽  
Irrigation Reservoir ◽  
Inadequate Sample Size ◽  
Reservoir Design ◽  
The Impact

Climate projections are increasingly being presented in terms of uncertainties and probability distributions rather than median or ‘most-likely’ values. The current national UK climate change projections, UKCP09, provide 10,000 probabilistic projections (PP) and 11 spatially coherent projections (11SCP) for three future emission scenarios. In contrast, previous iterations such as UKCIP02 provided only a single ‘most-likely’ (deterministic) projection for each. This move from deterministic to probabilistic methods of communicating climate change information, whilst increasing the wealth of the data, complicates the process of adaptation planning by communicating extra uncertainty to the public and decision-makers. This paper examines the application of probabilistic climate change projections and explores the impact of uncertainty on decision-making, using a case study of irrigation reservoir design at three sites in the UK. The implications of sub-sampling the PP using both simple random and Latin-hypercube sampling are also explored. The study found that the choice of dataset has a much larger impact on irrigation reservoir design than emission uncertainty. The study confirmed the dangers of inadequate sample size, particularly when applying decision criteria based on extreme events, and found that more advanced stratified sampling techniques did not noticeably improve the reproducibility of decision outcomes.

scholarly journals RELIABILITY ANALYSIS OF A TWO SPAN FLOOR DESIGNED ACCORDING TO EUROCODE 5

2016 ◽  
Vol 36 (1) ◽  
pp. 18-25
Author(s):  
EN Ogork ◽  
AK Nakore
Keyword(s):  
Reliability Analysis ◽  
Structural Reliability ◽  
Load Ratio ◽  
Structural Safety ◽  
Live Load ◽  
Structural Elements ◽  
Limit States ◽  
Analysis And Design ◽  
Modes Of Failure ◽  
Reliability Method

This paper presents the structural reliability assessment of a two span timber floor of strength class D40 designed in accordance with Eurocode 5 (2004).  The Structural analysis and design of the timber floor system was carried out using deterministic approach, considering both ultimate and serviceability limit states. Reliability analysis of the floor structural elements to ascertain its level of safety was carried out using first order reliability method (FORM) for the four modes of failure of bending shear, bearing and deflection. The reliability analysis involved investigation of the effects of variation of the applied dead to live load ratio and the cross sectional parameters of the floor. The results revealed that the deterministic design is satisfactory as limiting stresses and deflection were not exceeded. The primary floor joists had safety indices in shear and bending of 1.2 to 2.8 with decrease in dead to live load ratio and were below the recommended safety index of 3.8 specified in joint committee on structural safety (JCSS). The timber floor structural elements are more reliable in bearing, shear and deflection and critical in bending mode of failure. The section depth and span of floor elements are more sensitive in bending and deflection modes than shear and bearing modes. http://dx.doi.org/10.4314/njt.v36i1.3

scholarly journals On the reliability of a renewable multiple cold standby system

2005 ◽  
Vol 2005 (3) ◽  
pp. 269-273
Author(s):  
E. J. Vanderperre
Keyword(s):  
Reliability Analysis ◽  
Queuing Theory ◽  
Survival Function ◽  
Exact Result ◽  
Duplex System ◽  
Cold Standby ◽  
Standby System ◽  
General Reliability

We present a general reliability analysis of a renewable multiple cold standby system attended by a single repairman. Our analysis is based on a refined methodology of queuing theory. The particular case of deterministic failures provides an explicit exact result for the survival function of the duplex system.

Sign in / Sign up

Export Citation Format

Share Document