Download or read book Deflection of Partially Prestressed Concrete Beams Under Sustained and Cyclic Fatigue Loadings written by Siri Watcharaumnuay and published by . This book was released on 1984 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A New Model for Computing Deflection of Partially Prestressed Concrete Beams Under Static and Cyclic Fatigue Loading written by Ali Salah Alameh and published by . This book was released on 1988 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was conducted to evaluate the deflection of partially prestressed concrete beams (PPC) under static and cyclic fatigue loading covering the boundaries of fully prestressed and fully reinforced. Two analytical models were developed, one model for predicting deflection under service monotonic loading and the other for predicting deflection under cyclic fatigue loading. Both models were derived based on interaction between the tensile steel and concrete through bond and slip of reinforcement between the cracked sections. The developed models were compared With extensive experimental results and showed to reproduce, within a good degree of accuracy, load-deflection response of PPC beams tested under both static and cyclic fatigue loading-Several conclusions were drawn on the basis of analytical results, verified by experimental evidence. In designing prestressed concrete beams for fatigue loading, careful consideration should be given to the increase in reinforcement stresses induced by cyclic creep of concrete. This phenomenon is particularly important in cracked fully prestressed beams where the stresses were observed to increase significantly with number of cycles. This phenomenon does not only reduce the fatigue life of the beams but also results in a significant increase in their deflections under cyclic loading. The reinforcing steel in the partially prestressed beams plays a major role in reducing the phenomenon of steel stress increase under cyclic loading which results in enhancing their fatigue life and deformation performance! cracking, deflection,). It was found also, that parameters, such as bond strength, crack spacings and bar diameters have little influence on the service load-deflection response post cracking indicating that the contribution of the uncracked regions of the concrete member to its overall flexural rigidity can be practically neglected.
Download or read book Deflection of Partially Prestressed Concrete Beams Under Sustained and Cyclic Fatique Loadings written by Siri Watcharaumnuay and published by . This book was released on 1984 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book DEFORMATION AND CRACKING OF PARTIALLY PRESTRESSED CONCRETE BEAMS UNDER STATIC AND CYCLIC FATIGUE LOADING written by Muhaned H. Harajli and published by . This book was released on 1984 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book DEFORMATION AND CRACKING OF PARTIALLY PRESTRESSED CONCRETE BEAMS UNDER STATIC AND CYCLIC FATIGUE LOADING DEFLECTION written by MUHAMED HUSEIN HARAJLI and published by . This book was released on 1985 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: of 2 identical specimens designed with the same input parameters. One beam was tested under static load and the second beam was tested under cyclic fatigue loading at a constant load range simulating full live load.
Download or read book Partial Prestressing From Theory to Practice written by M.Z. Cohn and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: These volumes contain the edited documents presented at the NATO-Sponsored Advanced Research Workshop (ARW) on Partial Pre8tre88ing, from Theory to Practice, held at the CEBTP Research Centre of Saint-Remy-Ies-Chevreuse, France, June 18-22, 1984. The workshop was a direct extension of the International Symposium on Nonlinearity and Continuity in Pre8tre88ed Concrete, organized by the editor at the University of Waterloo, Waterloo, Canada, July 4-6, 1983. The organization of the NATO-ARW on Partial Prestressing was prompted by the need to explain and reduce the wide dirrerences of expert oph:iipn· on the subject, which make more difficult the accep tance of partial prestressing by the profession at large. Specifically, the workshop attempted to: - produce a more unified picture of partial presetressing, by con fronting and, where possible, reconciling some conflicting American and European views on this subject; - bring theoretical advances on partial prestressing within the grasp of engineering practice; - provide the required background for developing some guidelines on the use of partial prestressing, in agreement with existing structural concrete standards. The five themes selected for the workshop agenda were: (1) Problems of Partially Prestressed Concrete (PPC). (2) Partially Prestressed Concrete Members: Static Loading. (3) PPC Members: Repeated and Dynamic Loadings. (4) Continuity in Partially Prestressed Concrete. (5) Practice of Partial Prestressing.
Download or read book DEFORMATIONS AND DEFLECTIONS OF PARTIALLY PRESTRESSED CONCRETE T BEAMS UNDER STATIC AND RANDOM AMPLITUDE FATIGUE LOADING written by MESSAOUD FOUNAS and published by . This book was released on 1989 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: observed that shear failure under random amplitude fatigue loading may need further investigation.
Download or read book Deformations and Deflections of Partially Prestressed Concrete T beams Under Static and Random Amplitude Fatigue Loading written by Messaoud Founas and published by . This book was released on 1989 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: observed that shear failure under random amplitude fatigue loading may need further investigation.
Download or read book The Shock and Vibration Digest written by and published by . This book was released on 1985 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flexural Behavior of Unbonded Post tensioned Partially Prestressed Concrete Beams written by Ashraf Elzanaty and published by . This book was released on 1983 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fatigue Life of Prestressed Concrete Beams written by Reinforce and published by ASCE Publications. This book was released on 1980 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prepared by the Reinforced Concrete Research Council of ASCE. This report reprints a collection of studies advancing the knowledge of the effects of fatigue loading on the structural behavior of prestressed concrete flexural members. Each study represents one phase of an extensive research program conducted at Lehigh University and sponsored by the Pennsylvania Department of Transportation, the Federal Highway Administration, and the Reinforced Concrete Research Council. The four areas of study are: the effect of stress gradient on the probable fatigue life of plain concrete, as related to the compression block of prestressed concrete flexural members; the probable fatigue life of seven-wire prestressing strand under repeated loading of either constant or varied magnitude; the probable fatigue life of prestressed concrete flexural members, as limited by the fatigue failure of the prestressing strand; and the susceptibility of prestressed concrete flexural members to fatigue failure in shear. This report provides guidance to structural engineers faced with the design or analysis of prestressed concrete flexural members and to research engineers who are seeking to extend the knowledge of structural behavior as affected by repeated loading.
Download or read book Behaviour of CFRP Prestressed Concrete Beams Under Sustained Loading and High Cycle Fatigue at Low Temperature written by Mohammad Reza Saiedi and published by . This book was released on 2009 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fibre-reinforced polymers (FRPs) are becoming increasingly accepted in structural engineering applications. In particular, Carbon-FRP (CFRP) tendons are proving to be promising as prestressing reinforcement for concrete structures. While several studies have been conducted on CFRP-prestressed concrete beams, very little attention has been given to their long-term behaviour at low temperatures. This thesis investigates the behaviour of CFRP prestressed concrete beams in two studies: (a) under sustained loading at low temperature, and (b) under high-cycle fatigue at low temperature. Seven 13 year old, 4.4 m long precast concrete T beams were tested, of which five were prestressed to various levels with CFRP tendons and two with conventional steel strands. In the first study, three beams were exposed to -27 °C while being subjected to a sustained load of 25% of their flexural capacity for 163 days. The sustained load produced cracking in two beams with lower prestress levels. Results were compared to those obtained from three similar beams subjected to the same sustained load at room temperature. Deflection increase under sustained load at low temperature was generally small and similar to that at room temperature. Prestressing strain had a direct relationship with temperature in the CFRP prestressed beams. After being subjected to sustained loading, all seven beams were tested in the second study. Only three of the five CFRP prestressed beams were subjected to cyclic loading, one at -28 °C and two at room temperature, while only one of the two steel prestressed beams was subjected to cyclic loading, at -28 °C. Cyclic loading consisted of 3 million cycles at a frequency of 0.85 Hz. The load range represented 21 to 42% of the flexural capacity of the CFRP prestressed beams and 30 to 60% of that of the steel-prestressed beam. Monotonic tests were run every 1 million cycles. Finally, all seven beams were monotonically loaded to failure. All CFRP prestressed beams survived the 3 million cycles but the steel prestressed beam failed after 185,000 cycles. However, the CFRP concrete bond was weakened by high prestress levels, cyclic loading, and low temperature during sustained loading and loading to failure. This resulted in bond failure at loads ranging from 69 to 91% of the full flexural capacity. Stiffness and camber gradually decreased during cyclic loading.
Download or read book Unified Procedures for Predicting the Deflection and Centroidal Axis Location of Nonprestressed and Partially Prestressed Members written by Dan E. Branson and published by . This book was released on 1981 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Civil Engineer s Reference Book written by L S Blake and published by CRC Press. This book was released on 1994-03-21 with total page 1242 pages. Available in PDF, EPUB and Kindle. Book excerpt: After an examination of fundamental theories as applied to civil engineering, authoritative coverage is included on design practice for certain materials and specific structures and applications. A particular feature is the incorporation of chapters on construction and site practice, including contract management and control.
Download or read book Fatigue Resistance of Partially Prestressed Concrete Beams to Large Range Loading written by Paul William Abeles and published by . This book was released on 1968* with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1985 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Probability of Fatigue Failure of Bonded type Prestressed Concrete Beams written by William Joseph Venuti and published by . This book was released on 1963 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
