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Concrete Box Girder Bridges

Concrete Box girder Bridges PDF
Author: Jörg Schlaich
Publisher: IABSE
ISBN: 3857480319
Format: PDF, Kindle
Pages : 108
Category : Box girder bridges
Languages : en
Size: 19.70 MB
View: 3063

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Concrete Box Girder Bridges

by Jörg Schlaich, Concrete Box Girder Bridges Books available in PDF, EPUB, Kindle, Docs and Mobi Format. Download Concrete Box Girder Bridges books,


Concrete Box Girder Bridges

Concrete Box Girder Bridges PDF
Author: Oris H. Degenkolb
Publisher: Iowa State Press
ISBN:
Format: PDF, Mobi
Pages : 106
Category : Technology & Engineering
Languages : en
Size: 45.59 MB
View: 5029

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Concrete Box Girder Bridges

by Oris H. Degenkolb, Concrete Box Girder Bridges Books available in PDF, EPUB, Kindle, Docs and Mobi Format. Download Concrete Box Girder Bridges books,


Design Of Bent Caps For Concrete Box Girder Bridges

Design of Bent Caps for Concrete Box girder Bridges PDF
Author: James Edwin Carpenter
Publisher: Transportation Research Board
ISBN: 9780309024280
Format: PDF
Pages : 124
Category : Box girder bridges
Languages : en
Size: 24.22 MB
View: 1438

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Design Of Bent Caps For Concrete Box Girder Bridges

by James Edwin Carpenter, Design Of Bent Caps For Concrete Box Girder Bridges Books available in PDF, EPUB, Kindle, Docs and Mobi Format. Download Design Of Bent Caps For Concrete Box Girder Bridges books, Design recommendations for integral bent caps in straight, continuous, reinforced concrete box-girder bridges were developed from the results of a combined experimental and analytical investigation. Test variables included the distribution of loads on the bent cap, the effect of flaring the column in the plane of the bent, the effective flange width of the bent cap in tension and in compression, the effect of spreading the main tensile reinforcement into the adjacent superstructure, and the location of the critical design sections.


Behavior Of Adjacent Precast Prestressed Concrete Box Girder Bridges

Behavior of Adjacent Precast Prestressed Concrete Box Girder Bridges PDF
Author: Kromel E. Hanna
Publisher:
ISBN: 9780549981343
Format: PDF, Mobi
Pages :
Category : Box girder bridges
Languages : en
Size: 77.91 MB
View: 3605

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Behavior Of Adjacent Precast Prestressed Concrete Box Girder Bridges

by Kromel E. Hanna, Behavior Of Adjacent Precast Prestressed Concrete Box Girder Bridges Books available in PDF, EPUB, Kindle, Docs and Mobi Format. Download Behavior Of Adjacent Precast Prestressed Concrete Box Girder Bridges books,


Load Rating And Evaluation Of Two Prestressed Concrete Box Girder Bridges With No Plans Using Non Destructive Load Testing

Load Rating and Evaluation of Two Prestressed Concrete Box Girder Bridges with No Plans Using Non destructive Load Testing PDF
Author: Dagmawie Degif Shikurye
Publisher:
ISBN:
Format: PDF, Kindle
Pages : 436
Category : Prestressed concrete bridges
Languages : en
Size: 27.52 MB
View: 739

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Load Rating And Evaluation Of Two Prestressed Concrete Box Girder Bridges With No Plans Using Non Destructive Load Testing

by Dagmawie Degif Shikurye, Load Rating And Evaluation Of Two Prestressed Concrete Box Girder Bridges With No Plans Using Non Destructive Load Testing Books available in PDF, EPUB, Kindle, Docs and Mobi Format. Download Load Rating And Evaluation Of Two Prestressed Concrete Box Girder Bridges With No Plans Using Non Destructive Load Testing books, Bridges with no plans are currently an issue in various states including New Mexico as many exist throughout the United States. Since these bridges have no existing plans and documentation, conventional load rating procedures can't be employed. Therefore in this research project, a four step procedure was developed for the load rating of prestressed concrete box girder bridges without plans. First, the total number and eccentricity of the prestressing strands in the bridge beams are estimated using Magnel diagrams. Second, material properties are obtained from the AASHTO Manual for Bridge Evaluation, AASHTO Standard Specifications, and/or the New Mexico provisions. Second, a Hilti PS 250 Ferroscan is used to detect the steel in the prestressed concrete beams and check the strand estimate and also determine the layout of the shear reinforcement. In addition, the concrete strength is estimated using a Windsor probe. Third, a diagnostic load test is performed to evaluate the in-service behavior and to measure the beam strains under a truck load approximately 60% of the target proof load determined based on the prestressing strand estimate and allowable tensile stress at service. Strain measurements are taken at critical locations to monitor the bridge response during the test. The objectives of this test are to determine the critical transverse truck path (i.e., ones producing the largest measured strains) and compare the measurements with analytical predictions. Fourth, a proof load test is conducted following the critical truck paths and under increasing truck loading until the allowable tensile stress or the target proof load is reached (whichever comes first). Results from the proof test are used to determine rating factors for legal loads. The AASHTOWare BrR software program is also used for purpose of comparison with the rating factors from the proof test. Two prestressed concrete box girder bridges in New Mexico located in Doña Ana County (Bridge 7722) and Bernalillo County (Bridge 8825) were evaluated in this study. For Bridge 7722, the BrR design ratings under HS-20 truck loading were computed as 1.073 and 1.791 at the inventory and operating level, respectively. Inventory and operating factors of 0.882 and 1.403, respectively, were obtained for Bridge 8825. These results, in particular the operating ratings greater than 1.0, provided the needed confidence to proceed with the load tests. Based on the results of the proof tests, rating factors were computed for New Mexico and AASHTO legal loads according to the AASHTO Manual for Bridge Evaluations. The lowest rating factors were 1.09 and 1.17 for Bridge 7722 and Bridge 8825, respectively, which showed that the two bridges did not need to be load posted for legal loads.