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Creep Analysis Of Concrete Structures At Normal And Raised Temperatures
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Book Synopsis Creep Analysis of Concrete Structures at Normal and Raised Temperatures by : Khalifa, Magdi Mohamed Ahmed
Download or read book Creep Analysis of Concrete Structures at Normal and Raised Temperatures written by Khalifa, Magdi Mohamed Ahmed and published by 1975.. This book was released on 1975 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Creep Analysis of Concrete Structures Subjected to Raised and Time-varying Non-uniform Temperatures by : Ahmad Moharram
Download or read book Creep Analysis of Concrete Structures Subjected to Raised and Time-varying Non-uniform Temperatures written by Ahmad Moharram and published by . This book was released on 1979 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :FIB – International Federation for Structural Concrete Publisher :FIB - International Federation for Structural Concrete ISBN 13 :0721010237 Total Pages :29 pages Book Rating :4.7/5 (21 download)
Book Synopsis The effect of elevated temperatures on concrete and concrete structures by J Irving by : FIB – International Federation for Structural Concrete
Download or read book The effect of elevated temperatures on concrete and concrete structures by J Irving written by FIB – International Federation for Structural Concrete and published by FIB - International Federation for Structural Concrete. This book was released on 1975-09-01 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of Temperature on Creep of Concrete by : H. G. Geymayer
Download or read book The Effect of Temperature on Creep of Concrete written by H. G. Geymayer and published by . This book was released on 1970 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of the literature on the effect of elevated temperatures on the time-dependent volume change due to load (creep) of concrete reveals incomplete and conflicting evidence. Some workers have found a 'creep maximum' at a particular temperature range; others have not encountered this phenomenon. Among those who have found it, there is lack of agreement as to what the range is. All available data have been collected, reduced to comparable form, and analyzed. The analysis has been reviewed in the light of the several theories of the mechanism of concrete creep. It is concluded that the new results on temperature effects on creep do not resolve the conflicts among the various creep theories, but they tend to support the seepage theory more than any other. Many factors affecting creep are found to be influential at elevated temperatures in analogous fashion to their influence at room temperature. These factors include time under load, applied stress, maturity of concrete, and moisture content of concrete. The effect of temperature, at least up to 50 C, is to increase creep by a factor of two or three at 50 C. (Author).
Book Synopsis Creep and Hygrothermal Effects in Concrete Structures by : Zdeněk P. Bažant
Download or read book Creep and Hygrothermal Effects in Concrete Structures written by Zdeněk P. Bažant and published by Springer. This book was released on 2018-01-17 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive treatise covers in detail practical methods of analysis as well as advanced mathematical models for structures highly sensitive to creep and shrinkage. Effective computational algorithms for century-long creep effects in structures, moisture diffusion and high temperature effects are presented. The main design codes and recommendations (including RILEM B3 and B4) are critically compared. Statistical uncertainty of century-long predictions is analyzed and its reduction by extrapolation is discussed, with emphasis on updating based on short-time tests and on long-term measurements on existing structures. Testing methods and the statistics of large randomly collected databases are critically appraised and improvements of predictions of multi-decade relaxation of prestressing steel, cyclic creep in bridges, cracking damage, etc., are demonstrated. Important research directions, such as nanomechanical and probabilistic modeling, are identified, and the need for separating the long-lasting autogenous shrinkage of modern concretes from the creep and drying shrinkage data and introducing it into practical prediction models is emphasized. All the results are derived mathematically and justified as much as possible by extensive test data. The theoretical background in linear viscoelasticity with aging is covered in detail. The didactic style makes the book suitable as a textbook. Everything is properly explained, step by step, with a wealth of application examples as well as simple illustrations of the basic phenomena which could alternate as homeworks or exams. The book is of interest to practicing engineers, researchers, educators and graduate students.
Book Synopsis Response of Reinforced Concrete Columns Under Temperature Induced Transient Creep Strain by : Saleh Mohammad Alogla
Download or read book Response of Reinforced Concrete Columns Under Temperature Induced Transient Creep Strain written by Saleh Mohammad Alogla and published by . This book was released on 2019 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural members experience significant creep deformations in later stages of fire exposure and are susceptible to failure due to temperature induced creep strains. Fire in a concrete structure can burn for several hours, and temperatures in concrete and reinforcing steel can exceed 500 °C. At such temperatures, high levels of creep strains can develop in concrete and steel, especially in reinforced concrete columns. However, temperature induced creep strains are not fully accounted for in evaluating fire resistance of concrete members even through advanced analysis, and there is a lack of data on high-temperature creep strains for specific types of concrete. To overcome current limitations, comprehensive experiments on evolution of transient creep strain are undertaken under various heating and loading regimes. Transient creep tests are conducted in the temperature range of 20 °C to 750 °C on four types of concrete; normal strength concrete, steel fiber reinforced concrete, high strength concrete, and high strength concrete with polypropylene fibers. The test variables include temperature, load level, rate of heating, strength of concrete and presence of fibers. Data from these tests indicate that transient creep strain constitutes a significant portion of the total strain developed during high-temperature exposure. Data also affirm that temperature range and stress level have significant influence on transient creep strain. However, rate of heating and presence of fibers have only a moderate influence on the extent of transient creep in concrete. Presence of steel fibers in normal strength concrete slightly reduce transient creep strain, while the presence of polypropylene fibers in high strength concrete leads to higher transient creep strain. Generated data from experiments is then utilized to propose temperature and stress dependent creep strain relations for concrete. These transient creep strain relations can be implemented in fire resistance evaluation of concrete members. To account for transient creep in undertaking fire resistance analysis of reinforced concrete (RC) columns, a three-dimensional finite element based numerical model is developed in ABAQUS. Temperature-induced creep strains in concrete and reinforcing steel are explicitly accounted for in this advanced analysis. The model also accounts for temperature induced degradation in concrete and reinforcing steel, and material and geometrical nonlinearities. The validity of the model is established by comparing fire response predictions generated from the model with measured response parameters in fire tests on RC columns. Results from the analysis clearly indicate that transient creep strain significantly influences the extent of deformations when the temperatures in concrete exceed 500 °C for stress level of 40% or more, and this in turn influences fire resistance of RC columns. The validated model is applied to assess the influence of transient creep on fire response of RC columns under different conditions, including different fire scenarios, load level, and number of exposed sides in a column. Results from the numerical studies clearly indicate that severe fire exposure induces higher creep strains in RC columns in much shorter duration than exposure to a standard building fire. Moreover, asymmetric thermal gradients resulting from two or three side fire exposure on a column, can increase transient creep effects and, thus, affect fire resistance. The extent of the developed transient creep in concrete columns under various scenarios of fire exposure is highly dependent on the type of concrete. Overall, results from the analysis infer that neglecting transient creep can lead to a lower prediction of deformations and, thus, overestimation of fire resistance in RC columns, particularly when subjected to severe fire exposure scenarios, with higher thermal gradients.
Book Synopsis Fundamental Research on Creep and Shrinkage of Concrete by : F.H. Wittmann
Download or read book Fundamental Research on Creep and Shrinkage of Concrete written by F.H. Wittmann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 515 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today research on creep and shrinkage of concrete is diversified to such a degree that specialists working in different areas sometimes find it difficult to understand one-another. Materials scientists are mainly interested in processes on a microstructural level but they do not necessarily understand the relevance of time dependent deformation in structural design. On the other hand engineers who apply simplified model laws in non-elastic structural analysis are not always in the position to judge the limitations implied in their approach. It is generally realized that further development can be stimulated by a more effective exchange of results and ideas among the different groups involved. In an attempt to bridge this obvious gap in September 1980 there was a Conference organized at Swiss Federal Institute of Technology in Lausanne. The papers presented at this meeting covered the wide range starting with microstructural aspects and mechanisms and including constitutive modelling and structural creep analysis. These contributions together with summaries of two panel discussions are being published in this volume. All serious of the meeting have been introduced by invited lectures. These papers will be published in a special volume "Creep and Moisture Effects in Concrete". This special volume is rather to be a general survey of the different areas covered while the present conference proceedings provide a unique selection of research papers. Nowadays time-dependent deformation of concrete can be taken into consideration realistically by computerized structural analysis.
Book Synopsis Designing for Effects of Creep, Shrinkage, Temperature in Concrete Structures by :
Download or read book Designing for Effects of Creep, Shrinkage, Temperature in Concrete Structures written by and published by . This book was released on 1971 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Creep Analysis for Prestressed Concrete Structures Subjected to Cyclic Loading and Temperature by : Kuei-Cheong Siu
Download or read book Creep Analysis for Prestressed Concrete Structures Subjected to Cyclic Loading and Temperature written by Kuei-Cheong Siu and published by . This book was released on 1982 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Reinforced Concrete Beams Subjected to Fire by : Bruce R. Ellingwood
Download or read book Analysis of Reinforced Concrete Beams Subjected to Fire written by Bruce R. Ellingwood and published by . This book was released on 1976 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methods for analytically predicting the behavior of simply supported reinforced concrete beams subjected to fire are presented. This is generally a two-step process involving a thermal analysis followed by a stress analysis. This study emphasizes the latter, wherein the determination of moment-curvature-time relationships for the beam cross section incorporates the temperature-dependent strength degradation in the steel and concrete as well as thermal and creep strains. The sensitivity of the predictions to various phases of analytical modeling is investigated to establish the parameters most important for the prediction of beam behavior and to indicate where additional data should be gathered. A comparison of predicted behavior with that observed in fire tests shows excellent agreement when realistic reinforcement temperature histories are used.
Book Synopsis Creep and Shrinkage by : Hubert Rüsch
Download or read book Creep and Shrinkage written by Hubert Rüsch and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is based on Reinforced Concrete-Prestressed Concrete, Volume 2, Accounting for the Effects of Creep and Shrinkage on the Behavior of Structural Systems by Hubert Rusch and Dieter Jungwirth, which appeared in German in 1976. Even then, it was Hubert Rusch's fervent wish to have his thoughts on the deformations of concrete translated into English in order to reach a wider audience. His earlier efforts to contribute a study to the Series of Monographs of the Ameri can Institute had unfortunately not succeeded. Despite a serious illness, Hubert Rusch undertook, with his characteristic prudence and thoroughness, the preparatory work for the translation and related revision of his book. Unfortunately fate did not grant him the satisfaction of seeing his work completed. Hubert Rusch died on October 17, 1979. In writing this book, Hubert Rusch drew on his many years of devoted study of the creep problem. These investigations go back to 1934. His awareness of the plastic deformation of concrete under sustained load, which had been reported to him on the occasion of an American sojourn, led him to discover the causes of a major building collapse. At his urging, Professor A. Hummel published, in 1935, a critical survey of the test results then available on concrete creep.
Book Synopsis Computer Analysis of the Effects of Creep, Shrinkage, and Temperature Changes on Concrete Structures by :
Download or read book Computer Analysis of the Effects of Creep, Shrinkage, and Temperature Changes on Concrete Structures written by and published by . This book was released on 1991 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, Two Volume Set by : Tada-aki Tanabe
Download or read book Creep, Shrinkage and Durability Mechanics of Concrete and Concrete Structures, Two Volume Set written by Tada-aki Tanabe and published by CRC Press. This book was released on 2008-09-01 with total page 1552 pages. Available in PDF, EPUB and Kindle. Book excerpt: CREEP, SHRINKAGE AND DURABILITY MECHANICS OF CONCRETE AND CONCRETE STRUCTURES contains the keynote lectures, technical reports and contributed papers presented at the Eighth International Conference on Creep, Shrinkage and Durability of Concrete and Concrete Structures (CONCREEP8, Ise-shima, Japan, 30 September - 2 October 2008). The topics covered
Book Synopsis Computer Analysis of the Effects of Creep, Shrinkage, and Temperature Changes on Concrete Structures by :
Download or read book Computer Analysis of the Effects of Creep, Shrinkage, and Temperature Changes on Concrete Structures written by and published by . This book was released on 1991 with total page 191 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Shrinkage and Creep in Concrete, 1966-1970 by : ACI Committee 209--Creep and Volume Changes in Concrete
Download or read book Shrinkage and Creep in Concrete, 1966-1970 written by ACI Committee 209--Creep and Volume Changes in Concrete and published by . This book was released on 1972 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Prediction of Creep, Shrinkage, and Temperature Effects in Concrete Structures by : American Concrete Institute
Download or read book Prediction of Creep, Shrinkage, and Temperature Effects in Concrete Structures written by American Concrete Institute and published by . This book was released on 2009 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Creep and Shrinkage in Concrete Structures by : Z. P. Bažant
Download or read book Creep and Shrinkage in Concrete Structures written by Z. P. Bažant and published by John Wiley & Sons. This book was released on 1982 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
