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Dissertations / Theses on the topic 'Engineering of dams'

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Published: 4 June 2021
Last updated: 4 February 2022

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1

Udamulla, K. M. Lakshika Ayomi. "Engineering assessment of the safety of existing dams." Thesis, Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18565323.

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2

Li, Bingjun. "Flowthrough and overtopped rockfill dams." Thesis, University of Ottawa (Canada), 1996. http://hdl.handle.net/10393/10420.

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The emphasis of this thesis is on the derivation of original results or improvement to the available results in order to obtain a practical design methodology for overtopped rockfill dams. The work comprised of experiments in a large hydraulic flume, and extensive theoretical development of design aspects. A non-linear finite element analysis for non-Darcy flow in dams has also been formulated. The important contributions of the thesis are listed as follows: I. Non-Darcy seepage flow. (1) Development of a general relationship between the Reynolds number and the friction coefficient for seepage
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3

Welch, Jonathan Paul. "Water flow through tailings dams." Thesis, Durham University, 1993. http://etheses.dur.ac.uk/5523/.

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Water levels in tailings dams are generally lower than those of standard earth dams. Previously, other authors have shown that embankment geometry and variation in permeability can be responsible for a concave upwards steady state seepage line. These factors are investigated in greater detail using a finite element program to model flow in the saturated portion of the embankment. It is shown that the angle of the upstream slope only has an appreciable effect on the form of the seepage line if the pond is close to the downstream face of the dam. An increasing permeability in the direction of fl
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4

Ding, Deping. "Consolidation analysis of embankment dams." Thesis, Swansea University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281063.

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5

Nilsson, Isak, and Leonard Sandström. "Behavior prediction of concrete dams." Thesis, KTH, Betongbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-289385.

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As many dams were built around 1950, the expected life span of these dams are about tobe reached. With this, the need for monitoring and increased understanding of the damsstructural integrity increases. In order to prevent failures, two warning signals are defined;alert and alarm. The main difference being that the first indicates an unexpected changein behavior that needs to be addressed and evaluated in the near future, while the otherrequires that immediate action must be taken to ensure the safety of the dam.This report aims to evaluate the applicability of different models for designing
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6

Bukenya, Patrick. "Ambient vibration testing of concrete dams." Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/10178.

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In this thesis, seven techniques namely; rational fractional polynomial, complex exponential, frequency domain decomposition (FDD) based techniques which include; frequency domain decomposition (FDD), enhanced frequency domain decomposition (EFDD), curve fitting frequency domain decomposition (CFDD) and stochastic subspace identification (SSI) methods namely; unweighted principal component (UPC), principal component (PC) and canonical variant analysis (CVA)) have been applied to data from ambient vibration testing of two concrete dams namely; Roode Elsberg and Kouga dams.
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7

Hansen, David. "The behaviour of flowthrough rockfill dams." Thesis, University of Ottawa (Canada), 1992. http://hdl.handle.net/10393/7658.

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This thesis deals with the hydraulics and stability of "flowthrough" rockfill embankments. This thesis provides new information in the following seven areas: (1) A multi-disciplinary consideration of most of the available equations describing one-dimensional non-Darcy flow. Such flow is characterized by a non-linear dependence of velocity on the hydraulic gradient. New data is presented to assist in the evaluation of the effect of particle irregularity, as compared to perfect spheres. (2) A new computational method to estimate the quantity of flow moving through a rockfill embankment, as a fun
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8

Hellgren, Rikard. "Condition assessment of concrete dams in cold climate." Licentiate thesis, KTH, Betongbyggnad, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-259719.

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Dams in many countries are approaching their expected service life. Proper assessment of the aging dams structural health increase the knowledge of the current safety, and allow for better planning of renovation and rebuilding investments. The behavior of concrete dams is, to a great extent, governed by the ambient variation in temperature and water level. In cold regions, the ice sheet formed in the reservoir may subject a pressure load on the dams. Theoretically, this load has a significant impact on the structural behavior of dams. Despite this, the maximum magnitude, as well as the seasona
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9

Sauvé, Ghislain. "Seismic analysis of uplifting concrete gravity dams." Thesis, McGill University, 1990. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=59640.

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Rational and efficient numerical modelling procedures are required to simulate the dynamic behaviour of dam-foundation-reservoir systems. Significant nonlinear response mechanism such as uplifting of the dam under severe ground motion should be considered to obtain a realistic evaluation of seismic stability and structural behaviour.<br>In this study, the performance of three different time-domain reservoir modelling procedures suitable for nonlinear analysis were investigated. These were an added mass approach based on the Westergaard method, and finite element formulations using either fluid
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10

Reynolds, Sonel. "Evaluating the decision criteria for the prioritisation of South African dams for rehabilitation in terms of risk to human lives." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/80288.

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Thesis (MScEng)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: In South Africa a large number of dams owned by the Department of Water Affairs (DWA) need to be rehabilitated. This study investigated the decision process involved in the prioritisation of dams for rehabilitation. DWA developed a risk analysis methodology for defining the risks associated with dam safety, expressed as the combination of the probability and consequences of dam failure. These risks are evaluated usingmultiple acceptability criteria to assess risk to human life and the economic, social, socio-economic and
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11

Venturelli, John. "Seasonal temperature and stress distributions in concrete gravity dams." Thesis, McGill University, 1992. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=56758.

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Seasonal thermal stresses have been found to contribute significantly to the long term degradation of strength and stiffness of concrete dams located in northern regions. Moreover, thermal stresses and strains must be evaluated to define the initial loading conditions for seismic safety analyses. In this study, finite element procedures to model the thermal response of concrete gravity dams are presented. Heat transfer and structural models of a typical dam-foundation-reservoir system are developed. The reservoir, foundation, and air temperature variations, as well as solar radiation, are eval
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12

Andersson, Joel, and Ludvig Hagberg. "Stability Analysis of High Concrete Dams : Longtan Dam - a case study." Thesis, Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-67719.

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13

Ikard, Scott. "Geoelectric monitoring of seepage in porous media with engineering applications to earthen dams." Thesis, Colorado School of Mines, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3602502.

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<p> A monitoring methodology is developed for investigating seepage and internal erosion in earthen dams with time-lapse measurements of self-potential anomalies associated with conservative salt and non-conservative heat tracer migration in the subsurface. The method allows for 1) detecting seepage zones in earthen dams and determining the preferential flow paths through seepage zones in a non-invasive manner from the ground surface, 2) monitoring the transient evolution of seepage path geometry, flow velocity, and permeability in real-time if high frequency measurements can be made, and 3)
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14

Priscu, Caius. "Behavior of mine tailings dams under high tailings deposition rates." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0024/NQ50240.pdf.

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15

Vos, Adele. "Unsteady flow conditions at dam bottom outlet works due to air entrainment during gate closure : Berg River dam model." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71850.

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Thesis (MSc)--Stellenbosch University, 2012.<br>ENGLISH ABSTRACT: A trial closure of the emergency gate of the Berg River Dam was undertaken by the Trans- Caledon Tunnel Authority (TCTA) on 12 June 2008. The air vent downstream of the emergency gate was designed to introduce air to mitigate the negative pressures that were expected in the conduit during emergency gate operations. The emergency gate has to close when the radial gate at the downstream end of the outlet conduit fails. Contrary to the theoretical design, the measured air vent velocities in the field indicated that, while the
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16

O'Connor, J. P. F. "The static and dynamic analysis of arch dams." Thesis, University of Bradford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371484.

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17

Zardari, Muhammad Auchar. "Stability of tailings dams : focus on numerical modelling." Licentiate thesis, Luleå tekniska universitet, Geoteknologi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18427.

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Upstream tailings dams may experience slope stability problems when the rate of raising is too fast. Tailings consolidate slowly due to low hydraulic conductivity. The excess pore pressures can build up due to accelerated rate of raising. The cumulative increase in excess pore pressures due to successive raisings can endanger slope stability of a tailings dam. The stability of a tailings dam is closely related to the consolidation process. The consolidation process and associated stability of an upstream tailings dam during staged construction was modelled with the finite element program PLAXI
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18

Mainali, Ganesh. "Monitoring of tailings dams with geophysical methods." Licentiate thesis, Luleå : Luleå university of Technology, 2006. http://epubl.luth.se/1402-1757/2006/07.

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19

Bhattacharjee, Sudip Sankar. "Static and seismic fracture analyses of concrete gravity dams." Thesis, McGill University, 1993. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=42301.

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Smeared crack analysis models, based on nonlinear fracture mechanics concepts, have been developed to investigate the fracture behaviour of concrete gravity dams. The proposed constitutive models have been implemented in a finite element analysis computer program for nonlinear static and seismic analyses of plain concrete structures. Extensive verifications of the computational models have been carried out by studying the nonlinear static response of notched concrete beams, a model concrete dam, and a full scale concrete gravity dam: all experimentally or numerically investigated in the past.
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20

Ahmadi-Nedushan, Behrooz 1966. "Multivariate statistical analysis of monitoring data for concrete dams." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82815.

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Major dams in the world are often instrumented in order to validate numerical models, to gain insight into the behavior of the dam, to detect anomalies, and to enable a timely response either in the form of repairs, reservoir management, or evacuation. Advances in automated data monitoring system makes it possible to regularly collect data on a large number of instruments for a dam. Managing this data is a major concern since traditional means of monitoring each instrument are time consuming and personnel intensive. Among tasks that need to be performed are: identification of faulty ins
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21

Hamade, Tarek. "Geotechnical design of tailings dams - a stochastic analysis approach." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=116869.

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Mine tailings dams are geotechnical structures that are designed to provide adequate and safe storage of tailings materials both during and after the end of mine life. The design of tailings dams is currently based on limit equilibrium methods (LEM) which are used to calculate slope stability safety factors under various operational loads. The minimum safety factor obtained from these analyses is retained to be the design safety factor. LEM's however suffer from a number of shortcomings most notably the lack of information on dam deformation and the interaction between effective stress and por
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22

Nzuza, Mbongeni Hopewell Sabelo. "Thermo-mechamical modelling of arch dams for performance assessment." Master's thesis, University of Cape Town, 2013. http://hdl.handle.net/11427/5017.

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Includes abstract.<br>Includes bibliographical references.<br>This document underscores various temperature related components and procedures for undertaking a successful performance analysis of concrete arch dams. Arch dams experience high temperature variations, which are generally assessed using finite element models. Deterioration of arch dams is caused principally by thermal effects, with 19% cases attributed to freezing and thawing, and 9% to temperature variations (Daoudu et al., 1997). The temperature loading conditions cause a high expanse of stresses at the various interface location
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23

Tofangchi, Mahyari Abbas-Ali. "Static and seismic rehabilitation of concrete gravity dams by post-tensioning." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=26430.

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Post-tensioning rehabilitation technique is often used to improve the static and dynamic stability of concrete gravity dams. The required post-tensioning force has often been estimated from the gravity method using simple static rigid body equilibrium. However, the application of linear and nonlinear (fracture) analysis techniques using the finite element method could be advantageous to optimize the design of post-tensioning strengthening schemes, specially under seismic loads where controlled damage is an acceptable performance criterion.<br>In this study, the flood and seismic safety evaluat
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24

Mason, P. J. "Scour under air entrained jets below dams and flip buckets." Thesis, City University London, 1987. http://openaccess.city.ac.uk/8329/.

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The most popular and accurate form of expression used over the last 50 years for estimating scour under falling jets is: D=Kqx Hy/dz There is, however, disagreement between Authors concerning which values should be used for K, x, y and z. It was. surmised by the writer that plunge pool air entrainment could also be a relevant parameter and apparatus was built to examine this assumption. Two dimensional testing without air indicated scour to be independent of head drop (H) and directly proportional to flow (q), such that x=1.0 and y=0.0. The introduction of air, to give air/water ratios that a
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25

Bjelkevik, Annika. "Stability of tailings dams : focus on water cover closure." Licentiate thesis, Luleå, 2005. http://epubl.luth.se/1402-1757/2005/85.

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26

Guiny, Eliane M. "Hydraulic and biological aspects of fish passes for dams." Thesis, University of Glasgow, 2001. http://theses.gla.ac.uk/1565/.

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The primary purpose of the dissertation is to quantify the efficiency and operation of various types of fish passes for dams. This is achieved through a novel experiment of testing juvenile salmon in a scale model fish-passes with a range of small structures including vertical slots, orifices, weirs and combinations of all three. Direct comparisons of the efficiency of each type of fish pass in terms of upstream migration. Two identical physical models were constructed, one at the Fisheries Research Services Freshwater Laboratory at Almondbank, Perth, Scotland where observations were made of f
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27

Al, Baghdady Shayma, and Linnea Khan. "Designing Roller compacted concrete (RCC) dams." Thesis, KTH, Betongbyggnad, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-231473.

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Concrete is the most common building material in the world and it consists of aggregates,cement and water that harden over time, it is also known as a composite material. The use ofconcrete is very versatile due to its resistance to wind and water and its ability to withstandhigh temperature. These qualities make concrete a suitable building material for largestructures such as dams.A dam is a huge construction that needs massive amount of concrete to build it with and thatleads to high cost, so alternative methods should be considered to minimize the cost ofconstructing the dams. One method i
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28

Mar, Laura E. (Laura Elizabeth). "Carbon impact of proposed hydroelectric dams in Chilean Patagonia." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/53068.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2009.<br>Includes bibliographical references (leaves 59-62).<br>The concern for and awareness of climate change is growing, and the world needs to react quickly and efficiently to manage the carbon intensity of the global energy industry. Making smart decisions about energy technology development requires a methodology to compare alternatives; one such methodology is a greenhouse gas emissions impact assessment. In the Aysen region of Chilean Patagonia, five hydroelectric dams with a nameplat
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29

Yilmaz, Metin. "Control Of Groundwater By Underground Dams." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1259621/index.pdf.

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In this study underground dams are briefly described and detailed information about the design and construction aspects is provided. Since the material, of which dam wall is composed, is the main variable influencing the groundwater behavior, various types of dam wall are discussed. The use and usefulness of the underground dams as a means of sustainable development, and their performance in the management of groundwater resources are analyzed with the help of two example studies. In the first example a hypothetical idealized aquifer is considered, while in the second one, a real aquifer is se
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30

Jantzer, Isabel. "Critical hydraulic gradients in tailings dams : comparison to natural analogies." Licentiate thesis, Luleå : Division of Mining and Geotechnical Engineering, Luleå University of Technology, 2009. http://pure.ltu.se/ws/fbspretrieve/3373119.

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31

Billstein, Mats. "Development of a numerical model of flow through embankment dams." Licentiate thesis, Luleå tekniska universitet, 1998. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-17140.

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32

Kovacevic, Nebojsa. "Numerical analyses of rockfill dams, cut slopes and road embankments." Thesis, Imperial College London, 1994. http://hdl.handle.net/10044/1/8009.

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33

Meri, Tony Carlos. "Temperature and thermal stress distribution in concrete arch dams in operation." Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/11420.

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The temperature field of concrete dams in operational stages is dominantly influenced by variations in environmental seasonal temperature and climatic conditions. Cyclic seasonal temperature and associated thermally induced stresses have been found to contribute significantly to long term degradation of strength and stiffness of concrete dams raising concerns about their durability (Leger et al. 1993). In this study, a critical review of the current state-of-the-art of temperature models for determining temperature distribution including the main environmental parameters influencing the temper
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34

Lalonde, Richard D. "Concrete spillway-earthfill interface for large dams a parametric study on soil-structure interaction." Thesis, University of Ottawa (Canada), 1989. http://hdl.handle.net/10393/5985.

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35

Hayes, Barbara D. (Barbara Dean). "Incremental damage analysis : determining appropriate hydrologic criteria at existing non-federal dams." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/14440.

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36

Liu, Xiaochen. "Reliability – based analysis of embankment dams." Thesis, KTH, Jord- och bergmekanik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-257872.

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Embankment dams are widely used as water-retaining structures through the world. Two principal structural failure modes of embankment dams are internal erosion and slope instability. The objective of this thesis is to investigate the feasibility of applying probabilistic methods in embankment dam assessment. Compared to deterministic methods, probabilistic methods considers the variability in material properties and the results are more assessable. Meanwhile, the derived sensitivity factors of the variables can be used to find the most influential one.Through a literature review, it is found t
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37

Rau, Jeffrey Scott. "Design and Evaluation of Stepped Spillways for High Dams." DigitalCommons@USU, 1994. https://digitalcommons.usu.edu/etd/4045.

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The purpose of this research was to investigate the hydraulic performance of stepped spillways. A thorough investigation was made of all printed material on stepped spillways, and a summary of this material is presented in the text. Data from experiments in the laboratory were used to develop a design procedure for stepped spillways and hydraulic jump stilling basins. The experimental study was conducted at Utah State University - Utah Water Research Laboratory in Logan, Utah. Four models were built and tested in the laboratory under various flowrates. The crest of the model spillway was const
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38

Fu, Jenny. "Evaluation of long-term performance of sodium silicate grouted in embankment dams." Thesis, KTH, Jord- och bergmekanik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-275740.

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Embankment dams is the most common type of dams in operation inSweden today. Due to the nature of embankment dams, seepage throughthem will always occur. If the seepage velocity exceeds a critical velocity,internal erosion is initiated, which could lead to damage in form of pipingand sinkholes. To treat this problem, remedial grouting has beenperformed involving a combination of conventional grouts, i.e. cement andcement-bentonite as well as sodium silicate, which is a chemical grout thatalso known as water glass. Regarding the sodium silicate grout, there isconcern about the long-term permane
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39

Mosher, Benjamin R. (Benjamin Riel) 1976. "The national economic effects of breaching the Lower Snake River Dams." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/9018.

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Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2000.<br>Includes bibliographical references (leaves 99-102).<br>The four Lower Snake River Dams have been providing irrigation, recreation, navigation, and electricity generation capabilities to residents of the Northwest since their completion in 1975. Meanwhile, salmon populations have gradually been declining to the point that five species of Snake River salmon are now listed as endangered. In 1995, the NMFS released a report citing the Snake River Dams as potential contributors to this de
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40

Soliday, Stanley Jr. "Limits of limit equilibrium and finite element techniques applied to cracked debris dams on collapsing foundations." PDXScholar, 1991. https://pdxscholar.library.pdx.edu/open_access_etds/4428.

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Limits of slope stability, limit equilibrium methods, and of the finite element code FEADAM are reached in the application of these methods to the problem of cracked dams constructed on collapsing soils.
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41

Bondarchuk, Alexander. "Rock mass behavior under hydropower embankment dams : results from numerical analyses." Licentiate thesis, Luleå : Luleå University of Technology, 2008. http://epubl.ltu.se/1402-1757/2008/03/.

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42

Fekadu, Robel Tekeste, and Sujata Kayastha. "Safety Assessment of Cracked Buttress Dams." Thesis, KTH, Betongbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-284527.

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Most of the concrete buttress dams in Sweden were built from the 1950s till the1980s based on the traditional method of analyses. Those structures are reinforced and heavy in structure. Their height to thickness ratio being large makes them prone to crack during their lifespan. The presence of these cracks make the reinforcements used in the buttress dam susceptible to corrosion due to the water entering through the cracked areas. Therefore, studying the effect of cracks and corrosion regarding the safety of dams is important and should be carried out before the dams fail to function. However,
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43

Pattanaik, Chinmoy. "Experimental Assessment of Contact Erosion in Embankment Dams with Glacial Till Core." Thesis, Luleå tekniska universitet, Geoteknologi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-71610.

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Contact erosion is a type of  internal erosion which develops at the boundary between two varying soil layers inside a dam body under the condition of tangential water flow inside the coarser soil parallel to the boundary. As the behaviour of foundation is unknown as the grout curtain starts eroding after a couple of years. This zone between the embankment and foundation also leads to contact erosion.  Laboratory methods are a fast method of assessing the conditions for contact erosion to initiate as they do not involve a large investment like field testing methods. They also give an insight o
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44

Nash, Timothy Richard. "Engineering geological assessment of selected landslide dams formed from the 1929 Murchison and 1968 Inangahua earthquakes." Thesis, University of Canterbury. Geological Science, 2003. http://hdl.handle.net/10092/9342.

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This study investigated the characteristics of 26 failed and non-failed landslide dams (Murchison dataset) formed in the northern part of the South Island, New Zealand, from the 1929 Murchison and 1968 Inangahua earthquakes. The dataset was compiled from a combination of engineering geological mapping, field investigations, aerial photography interpretation and a review of existing literature. Current analysis techniques have been applied to the investigated landslide dams to assess their ability to accurately predict the post-formation development (or ‘evolution’) of the dam overtime. This ha
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45

Guevremont, Philippe. "Application of the MSR Impact-Echo system for crack detection in concrete dams." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ37263.pdf.

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46

Randolph, Michael David. "Load transfer mechanisms and performance of prestressed rock anchors for dams." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/19917.

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47

Preziosi, Marie-Christine. "The probabilistic assessment of small homogeneous UK earthfill dams affected by climate change : precipitation." Thesis, City University London, 2013. http://openaccess.city.ac.uk/2731/.

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The focus of this research is on small, well-established, homogeneous earthfill embankment dams that are currently in use and whose performance was previously outside the Reservoirs Act 1975, but are now governed by the new Flood and Water Management Act 2010. Many uncertainties are associated with such structures, a situation that can lead to the threat of dam failure when extreme climate conditions develop. Therefore, merely carrying out a deterministic assessment for such structures is insufficient and more sophisticated models, which reflect uncertain conditions of the dam site are require
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48

Ozkuzukiran, Riza Savas. "Settlement Behaviour Of Concrete Faced Rockfill Dams: A Case Study." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/12605835/index.pdf.

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In this study settlement behaviour of K&uuml<br>rt&uuml<br>n dam, which is the first concrete faced rockfill dam in Turkey, is investigated. Two dimensional plane strain finite element analyses are carried out in order to determine the total stresses and displacements during construction and reservoir filling conditions. Hardening soil model is used in order to represent the non-linear, inelastic and stress dependent behaviour of rockfill material. Material model parameters are selected mainly referring to the previous studies on the dams consisting of similar materials. Calculated stresses an
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49

Dankers, Clyde Lleland. "A framework for the evaluation of the structural safety of existing concrete gravity dams." Master's thesis, Faculty of Engineering and the Built Environment, 2019. http://hdl.handle.net/11427/31226.

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Addressing the aging and deterioration of dams is a relatively new challenge in the dam engineering field in South Africa. The average life expectancy of a dam is approximately 50 years, but they can normally be used for much longer periods than this. Maintenance and rehabilitation are vital to ensure that they achieve their design service lives and for the extension of their service lives. The rehabilitation of dams to extend their service lives and/or to ensure that they comply with modern stability criteria can be an extremely lengthy and costly exercise. It would therefore be valuable to d
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Bukenya, Patrick. "Structural performance evaluation of concrete arch dams using ambient vibration monitoring and GNNS systems." Doctoral thesis, Faculty of Engineering and the Built Environment, 2021. http://hdl.handle.net/11427/32568.

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Abstract:
Societies around the world are heavily dependent on civil engineering infrastructures such as concrete dams that provide necessities such as water supply for irrigation, hydroelectric power generation and prevention of floods. As a result, it is important to ensure that concrete dams are protected such that their failure is avoided. To ensure the structural safety of these structures, concrete dams are continuously monitored by sensors installed on the dam to detect any unusual behaviour. Data collected by the sensors include environmental variables (temperature and water levels) and dam respo
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