Tl 4 Crash Testing Of The F411 Bridge Rail
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Tl 4 Crash Testing Of The F411 Bridge Rail
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Author : Dean C. Alberson
language : en
Publisher:
Release Date : 2004
Tl 4 Crash Testing Of The F411 Bridge Rail written by Dean C. Alberson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Bridge railings categories.
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.
Crash Testing And Evaluation Of The Modified T77 Bridge Rail
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Author :
language : en
Publisher:
Release Date : 2003
Crash Testing And Evaluation Of The Modified T77 Bridge Rail written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Bridge railings categories.
Under a previous study, Texas Transportation Institute (TTI) and the Texas Department of Transportation (TxDOT) worked cooperatively to conceptualize and develop two aesthetically pleasing and crashworthy rail designs. The rails were designated the T77 and F411. Researchers performed and evaluated full-scale crash tests on the new rails in accordance with National Cooperative Highway Research Program (NCHRP) Report 350 test 3-11. The TxDOT F411 bridge rail performed acceptably according to the evaluation criteria of NCHRP Report 350. However, the T77 design failed to perform acceptably with the pickup truck. The objective of this project was to modify the TxDOT T77 bridge rail to perform as an aesthetically pleasing and crashworthy bridge rail. TTI and TxDOT worked cooperatively to modify the design to make the rail perform satisfactorily. Researchers performed full-scale crash tests in accordance with NCHRP Report 350. The T77 bridge rail was modified so it would perform in accordance with the evaluation criteria for NCHRP Report 350 test 3-11.
Vehicular Crash Tests Of The California St 20 Bridge Rail
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Author : John Russell Jewell
language : en
Publisher:
Release Date : 2004
Vehicular Crash Tests Of The California St 20 Bridge Rail written by John Russell Jewell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Bridge railings categories.
Over the course of this project a see-through steel bridge rail (Type California ST-20) was developed and tested. The ST-20, as tested, is at the limits of meeting the NCHRP Report 3501 TL-4 test matrix. The bridge rail also met the requirements established in the AASHTO Bridge Design Specifications for use as a bicycle rail and is considered an aesthetically pleasing see-through bridge rail. The barrier, as tested, uses steel posts at 3-m spacing to support four boxbeam rails and one additional handrail to meet the height requirements for bicycles. Because the ST-20 is based on a TL-4 bridge rail from Wyoming DOT3,4, only Test 4-11 (NCHRP Report 350) was considered necessary.
Mash Tl 3 Crash Testing And Evaluation Of The T631 Bridge Rail
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Author : William F. Williams (Transportation engineer)
language : en
Publisher:
Release Date : 2016
Mash Tl 3 Crash Testing And Evaluation Of The T631 Bridge Rail written by William F. Williams (Transportation engineer) and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Automobiles categories.
The Texas Type T631 bridge rail was developed as a low-cost, flexible bridge rail system for TL-2 applications. Many of the features used for the system tested at MxRSF for TL-3 were incorporated into the design developed for this project for MASH TL-2 application. The TxDOT Type T631 bridge rail was designed, developed, and evaluated under MASH TL-2. The objective of this research was to evaluate the impact performance of the new TxDOT Type T631 bridge rail to MASH TL-3. The TxDOT Type T631 bridge rail was intended to serve as a low-cost replacement for the TxDOT Type T6 bridge rail for MASH TL-2 applications. The crash testing was performed in accordance with the requirements of MASH TL-3. The TxDOT T631 Bridge Rail performed acceptably for MASH TL-3.
Crash Test And Evaluation Of The Txdot T224 Bridge Rail
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Author :
language : en
Publisher:
Release Date : 2018
Crash Test And Evaluation Of The Txdot T224 Bridge Rail written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Automobiles categories.
The objective of thei research was to evaluate the impact performance of the TxDOT T224 Bridge Rail according to the safety performance evaluation guidelines included in AASHTO MASH for test level five (TL 5). This report describes the TxDOT T224 Bridge Rail, documents the impact performance of the rail system according to MASH TL-5 evaluation criteria, and presents recommendations regarding implementation.
Crash Tests Of R4 Retrofit And Open Parapet Bridge Rails
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Author : Ensco, inc. Applied Technology and Engineering Division
language : en
Publisher:
Release Date : 1992
Crash Tests Of R4 Retrofit And Open Parapet Bridge Rails written by Ensco, inc. Applied Technology and Engineering Division and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Bridge railings categories.
Testing And Evaluation Of The New York Two Rail Curbless And Four Rail Curbless Bridge Railing And The Box Beam Transition
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Author : C. Eugene Buth
language : en
Publisher:
Release Date : 1999
Testing And Evaluation Of The New York Two Rail Curbless And Four Rail Curbless Bridge Railing And The Box Beam Transition written by C. Eugene Buth and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Automobiles categories.
The objective of this study was to crash test and evaluate the New York Two-Rail Curbless and FourRail Curbless Bridge Railings, and the box beam transition. Under the first part of the study, the Two-Rail and Four-Rail bridge railings were evaluated to National Cooperative Highway Research Program (NCHRP) Report 350 test level 4 (TL-4). To evaluate to TL-4, three full-scale crash tests on the length of need (LON) of the longitudinal barrier, or bridge railing, are required. These include an 820-kg passenger car impacting the critical impact point (CIP) at a nominal impact speed and angle of 100 km/h and 20 degrees, a 2000-kg pickup truck impacting the CIP at a nominal impact speed and angle of 100 km/h and 25 degrees, and an 8000-kg single-unit truck impacting the CIP at a nominal impact speed and angle of 80 km/h and 15 degrees. After evaluation of the two bridge railings, New York DOT and Federal Highway Administration (FHWA) decided to evaluate a box-beam transition attached to the New York Four-Rail Curbless Bridge Railing. NCHRP Report 350 test designation 3-21, which is the 2000-kg pickup truck impacting the CIP of the transition at 100 km/h and 25 degrees, was performed on the transition. This report presents the details and results of all six crash tests performed under this contract.
Crash Tests Of R4 Retrofit And Open Parapet Bridge Rails
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Author :
language : en
Publisher:
Release Date : 1992
Crash Tests Of R4 Retrofit And Open Parapet Bridge Rails written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Bridge railings categories.
Vehicle Crash Tests Of The Type 80 Bridge Rail
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Author : Robert Meline
language : en
Publisher:
Release Date : 1999
Vehicle Crash Tests Of The Type 80 Bridge Rail written by Robert Meline and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Automobiles categories.
An aesthetic, see-through concrete bridge rail, Type 80, was built and tested in accordance with National Cooperative Highway Research Program (NCHRP) Report 350. The Type 80 bridge rail is an 810 mm-tall, reinforced concrete barrier. The rail has 280 mm-high by 1620 mm-long gaps, 230 mm above the bridge deck surface. The barrier tested was 23 m-long and was constructed at the California Department of Transportation (Caltrans) Dynamic Test Facility in West Sacramento, California. A total of three crash tests were conducted under NCHRP Report 350 Test Level 4, one with an 820 kg car, one with a 2000 kg pickup truck and one with an 8000 kg single unit van truck.
Crash Test Evaluation Of Selected Bridge Rails
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Author : K. L. Hancock
language : en
Publisher:
Release Date : 1987
Crash Test Evaluation Of Selected Bridge Rails written by K. L. Hancock and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1987 with Bridge railings categories.