Download or read book Box Beams for Prestressed Concrete Bridges Test of a model through voided box beam bridge written by and published by . This book was released on 1967 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Box Beams for Prestressed Concrete Bridges Part 3 written by Pennsylvania. Department of Highways. Bureau of Testing and Research and published by . This book was released on 1970 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Box Beams for Prestressed Concrete Bridges Summary of previous research and recommendations for future testing written by and published by . This book was released on 1967 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Box Beams for Prestressed Concrete Bridges Through voided and conventional box beams subjected to combined bending and torsion written by and published by . This book was released on 1969 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pretensioned Box Beams written by Alejandro Raul Avendaño Valderrama and published by . This book was released on 2011 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pretensioned concrete box beams have been used in highway bridges for more than half a century. Due to their geometry, they have often been used as a viable alternative to the classic I-shaped girders. Box beams are highly effective in cases where speed of construction is a priority. However, the detailing and design of box beams are more complicated than that of I-shaped girders. The flow of forces at the beam's end blocks must be understood in order to detail reinforcement adequately. The following were the objectives of this research study: (i) quantify the demands placed on box beam end blocks upon prestress transfer, (ii) characterize the demands placed on box beam end blocks upon the application of superimposed loads, (iii) evaluate the effects of alternative void geometries at skewed ends of box beams on curing temperatures, (iv) based on the knowledge gained in (i), (ii) and (iii), improve the box beam end blocks, (v) test the improved end block under worst case scenario demands at prestress transfer and under extreme loading conditions, and (vi) validate currently used shear strength design methodologies in their application to pretensioned box beams. In order to achieve these objectives, an experimental program was conducted. The experimental program included the load testing of ten 4B28 and five 5B40 box beams, for a total of twenty nine load tests. The influence of several factors that distinguish box beam behavior from the better-understood I-shaped girder behavior was studied. Additionally, the experimental program included the fabrication, instrumentation and early-age behavior study of five 5B40 box beams. The first three beams were used to vii assess the behavior of box beams fabricated with the current TxDOT standard details (from December 2006). The fourth beam incorporated modifications to the standard reinforcement details based on the observations made through the study of the first three 5B40 box beams. The last specimen corresponded to a new box beam cross section (5XB40) optimized to be used in a spread-box beams configuration.
Download or read book Box beams for prestressed concrete bridges part I written by and published by . This book was released on 1967 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pretensioned Box Beams written by Alejandro Avendaño and published by . This book was released on 2013 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pretensioned concrete box beams have been used in highway bridges for more than half a century. Due to their geometry, they have often been used as a viable alternative to the classic I-shaped girders. Box beams are highly effective in cases where speed of construction is a priority. However, the detailing and design of box beams are more complicated than that of I-shaped girders. The flow of forces at the beam's end blocks must be understood in order to detail reinforcement adequately. The following were the objectives of this research study: (1) quantify the demands placed on box beam end blocks upon prestress transfer, (2) characterize the demands placed on box beam end blocks upon the application of superimposed loads, (3) evaluate the effects of alternative void geometries at skewed ends of box beams on curing temperatures, (4) based on the knowledge gained, improve the box beam end blocks, (5) test the improved end block under worst case scenario demands at prestress transfer and under extreme loading conditions, and (6) validate currently used shear strength design methodologies in their application to pretensioned box beams. In order to achieve these objectives, an experimental program was conducted. The experimental program included the load testing of ten 4B28 and five 5B40 box beams, for a total of twenty nine load tests. The influence of several factors that distinguish box beam behavior from the better-understood I-shaped girder behavior was studied. Additionally, the experimental program included the fabrication, instrumentation and early-age behavior study of five 5B40 box beams. The first three beams were used to assess the behavior of box beams fabricated with the current Texas Department of Transportation (TxDOT) standard details (from December 2006). The fourth beam incorporated modifications to the standard reinforcement details based on the observations made through the study of the first three 5B40 box beams. The last specimen corresponded to a new box beam cross section (5XB40) optimized to be used in a spread-box beams configuration.
Download or read book Destructive Load Testing of a Damaged and Deteriorated Prestressed Box Beam written by Richard A. Miller (Professional engineer) and published by . This book was released on 1995 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Evaluation and Field Monitoring of Self consolidating Concrete Prestressed Box Beams Implemented in a Demonstration Bridge written by David A. Bendert and published by . This book was released on 2007 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Concrete Box Beams Using Small computer Capacity written by B. I. Maisel and published by . This book was released on 1982 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Standard Prestressed Concrete Box Beams for Highway Bridge Spans to 103 Feet written by Prestressed Concrete Institute (U.S.) and published by . This book was released on 1959 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Standard Beam Sections for Prestressed Concrete Bridges written by Prestressed Concrete Development Group and published by . This book was released on 1963 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Public Roads written by and published by . This book was released on 1968 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural Evaluation of LIC 310 0396 and FAY 35 17 6 82 Box Beams with Advanced Strand Deterioration written by Eric P. Steinberg and published by . This book was released on 2011 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the results from the testing of a full scale three span 43 year old adjacent prestressed concrete box beam bridge. This research is the second phase of the overall project entitled "Structural Evaluation of LIC-310-0396 Box Beams with Advanced Strand Deterioration" (State Job #134381). The first phase involved the forensic study and destructive testing of damaged individual beams removed from a similar type of bridge and described in the Interim - Phase I report. The results of Phase I showed the differences in behavior of the damaged beams on an individual basis. However, these beams do not exist in bridges as single members. The evaluation of the behavior of the complete bridge system is critical.
Download or read book Effect of Relative Flexural torsional Beam Characteristics Upon Load Distribution in Multi beam Bridges written by Daryl Eugene Young and published by . This book was released on 1993 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Structural Evaluation of LIC 310 0396 Box Beams with Advanced Strand Deterioration written by and published by . This book was released on 2010 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt: Four adjacent prestressed concrete box beams were removed from a decommissioned bridge and tested to destruction. The beams were 36 inches wide by 17 inches deep and had a span length of 37 feet 6 inches. Each beam contained fourteen, 1/2 inch diameter, stress relieved prestressed strands. All of the prestressed strands were arranged in one layer, which was located below the stirrups. One beam was in good condition, with the only visible deterioration being longitudinal cracking. One beam had three corroded prestressed strands visible and a large spalled segment which, when removed, exposed two additional prestressed strands. The remaining two beams were badly deteriorated, with spalled concrete exposing seven corroded prestressed strands. The provisions of the AASHTO LRFD Bridge Design Specifications, the AASHTO Standard Specifications, and the PCI Design Handbook were used to evaluate the loss of prestressing force. The measured prestressing force loss was closest to the AASHTO LRFD Bridge Design Specifications, but all three methods provided conservative estimates of prestressing force loss. The bridge had been designed using the AASHTO Standard Specifications. The provisions of the Standard Specifications were conservative in determining the ultimate loading for the undeteriorated beam. The provisions of the Standard Specifications were also conservative in determining the ultimate load for the deteriorated beam if the deteriorated strands were assumed ineffective. The deteriorated concrete box beams were all ductile and had final deflections exceeding L/50. The original bridge was rated using the test results. When following the provisions of the AASHTO Standard Specifications, the designed service loading for the bridge would have exceeded the ultimate loading of one deteriorated middle span beam. A failure of this beam would not have caused a progressive failure of the middle span under service loadings. Following the Load Factor Rating method for the middle span beams, the loadings exceeded the strength of the members. Therefore, load restrictions would have been required for the bridge had it not been decommissioned.
Download or read book Transportation Research Record written by and published by . This book was released on 1980 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:
