Testing And Evaluation Of The Florida Jersey Safety Shaped Bridge Rail PDF Download
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Author | : |
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Total Pages | : 102 |
Release | : 2004 |
Genre | : Bridge railings |
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Download Testing and Evaluation of the Florida Jersey Safety Shaped Bridge Rail Book in PDF, ePub and Kindle
The objectives of this portion of the project were to: 1) determine if any or all of the three subject variants of the 32-inch (813 mm) Jersey safety shaped bridge railing comply with the requirements of the AASHTO LRFD Bridge Design Specifications and National Cooperative Highway Research Program (NCHRP) Report 350 Test Level 4 (TL4), and 2) provide recommended retrofit schemes, if deemed technically and economically feasible, to bring into compliance the railings that do not comply. Full or partial replacement schemes may also be recommended as appropriate. The most direct approach for accomplishing the objectives of this task was to perform a full-scale crash test of the most critical design. If that railing performed satisfactorily, the railing would be acceptable by AASHTO LRFD Specifications. The strength test was selected, NCHRP Report 350 test 4-12, a single-unit van-type truck weighing 17,6211b (8000 kg). The TL-4 vehicle is a single-unit box-van truck impacting the railing at 15 degrees and 49.7 mi/h (80 kmIh). While containment is required, overturning of the vehicle is an acceptable test outcome. However, Test Level 3 (TL-3) is a 4405-lb (2000 kg) pickup impacting the railing at 25 degrees and 62.2 mi/h (l00 kmIh). This test requires both containment and stability, and non-overturning. Since some breakage of the parapet is possible, potential for vehicle snagging is likely. Vehicle snagging can contribute to vehicle instabilities in the redirection sequence and potential rollover. Therefore, researchers chose both TL-4 and TL-3 tests. According to the results of this project, no field retrofits or replacements of the Florida Jersey safety shaped bridge rails, depicted in the Florida DOT Index 799, are warranted since the most critical 32-inch (813 mm) Jersey safety shaped bridge railing complied with the requirements of the AASHTO LRFD Bridge Design Specifications and NCHRP Report 350 Test Levels 3 and 4.
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Total Pages | : 65 |
Release | : 1997 |
Genre | : |
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Download Testing of New Bridge Rail and Transition Designs Book in PDF, ePub and Kindle
Author | : Eugene Buth |
Publisher | : |
Total Pages | : 172 |
Release | : 1997 |
Genre | : Bridge railings |
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Download Crash Testing and Evaluation of Retrofit Bridge Railings and Transition Book in PDF, ePub and Kindle
An assortment of retrofit bridge railings and a retrofit transition were evaluated through full-scale crash testing. The assortment included: (1) a W-beam retrofit railing for a concrete baluster bridge railing (AASHTO performance level one); (2) a W-beam transition for the bridge railing above (NCHRP Report 350 test level two); (3) a double-tube pedestrian/bicycle railing mounted on the Illinois 2399-1 traffic railing (AASHTO performance level one); (4) a vandal protection fence on the New Jersey concrete safety shape bridge railing (AASHTO performance level two); and (5) a thrie beam retrofit railing, a Delaware design, mounted on a 203-mm-high safety curb (AASHTO performance level two and NCHRP Report 350 test level four). All of the designs demonstrated acceptable performance.
Author | : Pedro Serna |
Publisher | : Springer Nature |
Total Pages | : 994 |
Release | : 2021-09-04 |
Genre | : Technology & Engineering |
ISBN | : 303083719X |
Download Fibre Reinforced Concrete: Improvements and Innovations II Book in PDF, ePub and Kindle
This volume highlights the latest advances, innovations, and applications in the field of fibre-reinforced concrete (FRC), as presented by scientists and engineers at the RILEM-fib X International Symposium on Fibre Reinforced Concrete (BEFIB), held in Valencia, Spain, on September 20-22, 2021. It discusses a diverse range of topics concerning FRC: technological aspects, nanotechnologies related with FRC, mechanical properties, long-term properties, analytical and numerical models, structural design, codes and standards, quality control, case studies, Textile-Reinforced Concrete, Geopolymers and UHPFRC. After the symposium postponement in 2020, this new volume concludes the publication of the research works and knowledge of FRC in the frame of BEFIB from 2020 to 2021 with the successful celebration of the hybrid symposium BEFIB 2021. The contributions present traditional and new ideas that will open novel research directions and foster multidisciplinary collaboration between different specialists.
Author | : King K. Mak |
Publisher | : |
Total Pages | : |
Release | : 1996 |
Genre | : Bridge railings |
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Download Testing of State Roadside Safety Systems Book in PDF, ePub and Kindle
Author | : Roger P. Bligh |
Publisher | : |
Total Pages | : 140 |
Release | : 2007 |
Genre | : Roads |
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Download Initial Assessment of Compliance of Texas Roadside Safety Hardware with Proposed Update to NCHRP Report 350 Book in PDF, ePub and Kindle
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Publisher | : |
Total Pages | : 0 |
Release | : 1996 |
Genre | : Bridge railings |
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Download Test Level 4 Evaluation of the Minnesota Combination Bridge Rail Book in PDF, ePub and Kindle
A safety performance evaluation of the Minnesota concrete parapet with brush curb and metal rail (Minnesota Combination Bridge Rail) was conducted for the Minnesota Department of Transportation (Mn/DOT) as part of Year 4 of the Midwest States Regional Pooled Fund Program. The safety performance evaluation of this bridge rail system was conducted and reported according to the criteria specified in Test Level 4 of the National Cooperative Highway Research Program (NCHRP) Report No. 350, "Recommended Procedures for the Safety Performance Evaluation of Highway Features". This testing involved impacts with an 8000-kg single-unit truck, a 2000-kg pickup truck, and an 820-kg small car. The bridge rail design was modified following the 2000-kg pickup truck test in order to reduce the potential for snagging. After this modification was made, and the system was retested, the safety performance of this system was found to be acceptable and meets the safety standards set forth in Test Level 4 of NCHRP 350
Author | : K. K. Mak |
Publisher | : |
Total Pages | : 84 |
Release | : 1996 |
Genre | : |
ISBN | : |
Download Testing of State Roadside Safety Systems. Volume III: Appendix B: Crash Testing and Evaluation of a Guardrail System for Low-fill Culvert Book in PDF, ePub and Kindle
Author | : Dean C. Alberson |
Publisher | : |
Total Pages | : 54 |
Release | : 2004 |
Genre | : Bridge railings |
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Download TL-4 Crash Testing of the F411 Bridge Rail Book in PDF, ePub and Kindle
Texas Department of Transportation (TXDOT) and Florida Department of Transportation (FDOT) frequently receive requests to provide aesthetically pleasing traffic rails for use on select bridges and roadways. TxDOT, in response to providing context sensitive design alternatives, initiated a project to develop additional aesthetically pleasing rail alternatives. Under a previous TxDOT project, the F411 bridge rail was constructed and crash tested to Test Level 3 (TL-3). The TL-3 test is a 4405-lb (2000 kg) pickup impacting the railing at 25 degrees and 62.2 mi/h (100 krn/h). This test requires both containment and stability, and non-overturning. Since some breakage of the parapet is possible, potential for vehicle snagging is likely. Vehicle snagging can contribute to vehicle instabilities in the redirection sequence and potential rollover. The TxDOT F411 bridge rail contained and redirected the vehicle, which remained upright during and after the collision period. The bridge rail met the required specifications for NCHRP Report 350 test 3-11. The objective of this research is the full-scale crash test and evaluation of the F411 to Test Level 4 (TL-4). The most direct approach for accomplishing the objectives of this task is to perform a full-scale TL-4 crash test of this railing design. The TL-4 vehicle is a single-unit box-van truck impacting the railing at 15 degrees and 49.7 mi/h (80 krn/h). While containment is required, overturning of the vehicle 90 degrees is an acceptable test outcome. The TxDOT F411 bridge rail performed acceptably for NCHRP Report 350 test 4-12. Based on the performance of the F411 bridge rail in the full-scale crash test to TL-4 test conditions, the F411 may be used where containment of 18,000 lb single-unit trucks is desired.
Author | : Christopher A. Storf |
Publisher | : |
Total Pages | : 0 |
Release | : 2021 |
Genre | : Bridge railings |
ISBN | : |
Download Crash Testing and Evaluation of the Hawaii Modified Delaware Retrofit Thrie-beam Bridge Rail on Sidewalk Book in PDF, ePub and Kindle