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Dissertations / Theses on the topic 'Creep prediction models'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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1

Zhang, Ruomeng. "Evaluation of Current Concrete Creep Prediction Models." University of Toledo / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1461963600.

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2

Freidriks, Aida. "Prediction Models of Shrinkage and Creep in Industrial Floors and Overlays." Thesis, KTH, Byggvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-166188.

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All form of activity in a building is in need for a sound platform to be able to operate. The performance of concrete floor in industrial spaces is of importance because there are greater demands on industrial concrete floor. By making sure that the necessary recommendation regarding casting an industrial concrete floor is followed, the risk for failure is reduced. The Swedish Concrete Association (2008) recommends a w/c ratio of approximately 0.55 for industrial floors. This would result in a concrete strength class of C30/37 with an abrasive resistance adequate for most industrial floors. F

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3

Vincent, Edward Creed. "Compressive Creep of a Lightweight, High Strength Concrete Mixture." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/30962.

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Concrete undergoes volumetric changes throughout its service life. These changes are a result of applied loads and shrinkage. Applied loads result in an instantaneous recoverable elastic deformation and a slow, time dependent, inelastic deformation called creep. Creep without moisture loss is referred to as basic creep and with moisture loss is referred to as drying creep. Shrinkage is the combination of autogeneous, drying, and carbonation shrinkage. The combination of creep, shrinkage, and elastic deformation is referred to as total strain. The prestressed concrete beams in the Chickah

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4

Mucambe, Edson Silva David. "Creep and shrinkage prediction models for concrete water retaining structures in South Africa." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/5185.

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Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2010.<br>ENGLISH ABSTRACT: Concrete water retaining structures (WRS) in South Africa are under scrutiny due to the numerous durability problems that they have experienced lately; despite the efforts by local and national authorities in conserving these structures. At the heart of these problems are the creep and shrinkage phenomena. While shrinkage is the reduction of concrete volume with time, creep is defined as the time-dependent increase of concrete strain under constant or controlled stress. Both phenomena are affected

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5

Meyerson, Richard. "Compressive Creep of Prestressed Concrete Mixtures With and Without Mineral Admixtures." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/31525.

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Concrete experiences volume changes throughout its service life. When loaded, concrete experiences an instantaneous recoverable elastic deformation and a slow inelastic deformation called creep. Creep of concrete is composed of two components, basic creep, or deformation under load without moisture loss and drying creep, or deformation under drying conditions only. Deformation of concrete in the absence of applied load is often called shrinkage. The deformation due to creep is attributed to the movement of water between the different phases of the concrete. When an external load is appl

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6

Sethi, Vivek. "Unbonded Monostrands for Camber Adjustment." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/31335.

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Prestressed concrete structural members camber upwards or downwards depending upon the location of application of prestress force. Identical members do not camber equally due to variability of the factors influencing it. Differential camber in the beams, if significant, results in excessively tall haunches or girder top flange extending into the bottom of the slab. For adjacent members like deck bulb-tees and box girders that are to be transversely post-tensioned the differential camber causes problems during the fit up process. This variation is undesirable and hinders the smooth progress of

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7

Zhang, Bochun. "Failure Mechanism Analysis and Life Prediction Based on Atmospheric Plasma-Sprayed and Electron Beam-Physical Vapor Deposition Thermal Barrier Coatings." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/35709.

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Using experimentally measured temperature-process-dependent model parameters, the failure analysis and life prediction were conducted for Atmospheric Plasma Sprayed Thermal Barrier Coatings (APS-TBCs) and electron beam physical vapor deposition thermal barrier coatings (EB-PVD TBCs) with Pt-modified -NiAl bond coats deposited on Ni-base single crystal superalloys. For APS-TBC system, a residual stress model for the top coat of APS-TBC was proposed and then applied to life prediction. The capability of the life model was demonstrated using temperature-dependent model parameters. Using existing

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8

Stewart, Calvin. "A Hybrid Constitutive Model For Creep, Fatigue, And Creep-Fatigue Damage." Doctoral diss., University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/6023.

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In the combustion zone of industrial- and aero- gas turbines, thermomechanical fatigue (TMF) is the dominant damage mechanism. Thermomechanical fatigue is a coupling of independent creep, fatigue, and oxidation damage mechanisms that interact and accelerate microstructural degradation. A mixture of intergranular cracking due to creep, transgranular cracking due to fatigue, and surface embrittlement due to oxidation is often observed in gas turbine components removed from service. The current maintenance scheme for gas turbines is to remove components from service when any criteria (elongation,

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9

Feng, Chih-Wei. "Prediction of long-term creep behavior of epoxy adhesives for structural applications." Thesis, Texas A&M University, 2004. http://hdl.handle.net/1969.1/2560.

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The mechanical property of polymeric materials changes over time, especially when they are subjected to long-term loading scenarios. To predict the time-dependent viscoelastic behaviors of epoxy-based adhesive materials, it is imperative that reliable accelerated tests be developed to determine their long-term performances under different exposed environments. A neat epoxy resin system and a commercial structural adhesive system for bonding aluminum substrates are investigated. A series of moisture diffusion tests have been performed for more than three months in order to understand the inf

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10

Bandorawalla, Tozer Jamshed. "Micromechanics-Based Strength and Lifetime Prediction of Polymer Composites." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/26445.

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With the increasing use of composite materials for diverse applications ranging from civil infrastructure to offshore oil exploration, the durability of these materials is an important issue. Practical and accurate models for lifetime will enable engineers to push the boundaries of design and make the most efficient use of composite materials, while at the same time maintaining the utmost standards of safety. The work described in this dissertation is an effort to predict the strength and rupture lifetime of a unidirectional carbon fiber/polymer matrix composite using micromechanical techniq

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11

Brennan, Colin. "River Analysis and Climate Change: Continuous Prediction of Clay-Bed Erosion in Watts Creek." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/37042.

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Predicted future precipitation is downscaled and used to drive a hydrologic model to assess future erosion potential in a semi-alluvial clay-bed watercourse, Watts Creek. The 21 km2 watershed is predominantly urban, with overall impervious cover of 22%, and the remaining land use split between agricultural and forested areas. Continuous simulations for the open water year, excluding spring freshet (April 1st to October 31st) were performed using the SWMHYMO (Stormwater Management Hydrologic Model) lumped hydrologic modelling platform. A shear stress exceedance and stream power erosion routine

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12

Wang, Chen. "Simulation and Evaluation of Stream flow and Pesticide Prediction in Orestimba Creek Watershed using AnnAGNPS Model." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1564.

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Pesticides have been recognized as one major agricultural non-point source (NPS) pollution to the environment and surface water in United States. Numerous mathematical models have been developed over the last decades to simulate the fate and transport of NPS at watershed scale. Geographic Information System (GIS) combined with models extends the spatial and temporal scopes of the research by integrating a variety of climates, soils, land covers, and management practices. The Annualized Agricultural Nonpoint Source model (AnnAGNPS) has received considerable attention in the United States for es

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13

Jung, Helen Yoon Hee. "Improving post-fire hydrologic predictions using geochemical data and coupled model-optimization systems in Devil Creek, CA." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1905636861&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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14

DePriest, Keegan. "PETROPHYSICAL ANALYSIS OF WELLS IN THE ARIKAREE CREEK FIELD, COLORADO TO DEVELOP A PREDICTIVE MODEL FOR HIGH PRODUCTION." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2609.

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All the oil and gas wells producing in the Arikaree Creek Field, Colorado targeted the Spergen Formation along similar structures within a wrench fault system; however, the wells have vastly different production values. This thesis develops a predictive model for high production in the field while also accounting for a failed waterflood event that was initiated in 2016. Petrophysical analysis of thirteen wells show that high producing wells share common characteristics of pay zone location, lithology, porosity and permeability with one another and that the Spergen Formation is not homogenous.

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15

Bonini, Nick. "Assessing the Variability of Phytoplankton Assemblages in Old Woman Creek, Ohio." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1469959717.

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16

Li, Jenn-Hong, and 李鎮宏. "The Study of Current Prediction Model of Creep and Shrinkage in Structural Concrete." Thesis, 1996. http://ndltd.ncl.edu.tw/handle/97457903963569248641.

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17

Dang, Vu Hoai, and 武懷登. "Modified CCL Model for Prediction of Shrinkage and Creep in High-Performance Concrete Using Fly Ash." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/02816993845093519139.

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碩士<br>國立臺灣大學<br>土木工程學研究所<br>99<br>High-performance concrete (HPC) is concrete meeting special combinations of performance and uniformity requirements that cannot always be achieved routinely using conventional constituents and normal mixing, placing, and curing practices. Nowadays, with the development of construction, the higher buildings do not demand only the greater amount of concrete also demand the higher concrete strength. In addition the decrease of carbon dioxide discharged during the production of cement is an important issue, because carbon dioxide is a naturally occurring greenhous

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18

Bruder, Slawa Romana. "Prediction of Spatial-Temporal Distribution of Algal Metabolites in Eagle Creek Reservoir, Indianapolis, IN." Thesis, 2012. http://hdl.handle.net/1805/3043.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>In this research, Environmental Fluid Dynamic Code (EFDC) and Adaptive- Networkbased Fuzzy Inference System Models (ANFIS) were developed and implemented to determine the spatial-temporal distribution of cyanobacterial metabolites: 2-MIB and geosmin, in Eagle Creek Reservoir, IN. The research is based on the current need for understanding algae dynamics and developing prediction methods for algal taste and odor release events. In this research the methodology for prediction of 2-MIB and geosmin production was explored. The app

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19

Chung, Hsin-han, and 鍾欣翰. "Terrain stability analysis using hydrologic model for predicting shallow landslides－A study on Piya creek watershed." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/u2kf38.

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碩士<br>國立中央大學<br>應用地質研究所<br>96<br>In this study, we measured soil depth in the Piya creek watershed of the Tahan River, and established the relationship between soil depth and slope angle. The functional relationship was used to estimate soil depth in the entire watershed with employing slope angles which are derived from a Digital Terrain Model (DTM). We used a hydrology model and an infinite slope model to perform back analysis for soil strength and hydrologic conductivity for each stratigraphic zone in the watershed from an event-based landslide inventory and the event rainfall data of typho

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20

Chung, Yi-Ting, and 鍾亦婷. "Application of Grid Rational Algorithm for Predicting Hydrograph (GRAPH) Model for Runoff Simulation of Ba-zhang Creek Watershed." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/12510273062761205527.

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碩士<br>國立中興大學<br>水土保持學系<br>93<br>Flood hazards frequently attack riverine areas and cause casualties on the Ba-Zhang River watershed both in steep headwaters and downstream alluvial floodplains. After the 921 Earthquake, the loosened soils and rocks are easy to collapse. Massive landslides and debris flows are regularly induced by storm events. The human lives and properties are under threatened. In order to prevent watershed hazards, a systematic watershed control and management is an appropriate suggested method. The watershed analysis system simulates real-time data to predict hydrograph. Th

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21

Tsai, Po-Kun, and 蔡柏坤. "Prediction of Ground Anchors Load For Artificial Slopes Using Evolutionary AI Model-Case Study of The New Taipei Side Ring highway WuChong Creek Case." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/c6przw.

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碩士<br>國立臺灣科技大學<br>營建工程系<br>105<br>Development in the flat area of New Taipei City is approaching saturation. To respond to the rapid development of the city and reduce the gap between urban and rural areas, building traffic facilities on hillsides has become inevitable. However, after land excavation, filling, and preparation, hillsides become susceptible to the influence of various internal and external factors and tend to slide. Therefore, this study investigated artificial slopes secured by ground anchors and retaining structures. Assuring the stability of ground anchors and retaining struc

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