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Performance Evaluation Of Strong Post Double Faced W Beam Guardrail And Strong Post Double Faced Thrie Beam Guardrail At Mash Test Level 4 Tl 4 And Test Level 5 Tl 5 Conditions
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Book Synopsis Performance Evaluation of Strong Post Double-faced W-beam Guardrail and Strong Post Double-faced Thrie-beam Guardrail at MASH Test Level 4 (TL-4) and Test Level 5 (TL-5) Conditions by : Howie Fang
Download or read book Performance Evaluation of Strong Post Double-faced W-beam Guardrail and Strong Post Double-faced Thrie-beam Guardrail at MASH Test Level 4 (TL-4) and Test Level 5 (TL-5) Conditions written by Howie Fang and published by . This book was released on 2017 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Association of State Highway and Transportation Officials. Task Force for Roadside Safety Publisher : ISBN 13 : Total Pages :560 pages Book Rating :4.0/5 ( download)
Book Synopsis Roadside Design Guide by : American Association of State Highway and Transportation Officials. Task Force for Roadside Safety
Download or read book Roadside Design Guide written by American Association of State Highway and Transportation Officials. Task Force for Roadside Safety and published by . This book was released on 1989 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis NCHRP Report 350 Test 3-11 of the Strong Wood Post Thrie Beam Guardrail by :
Download or read book NCHRP Report 350 Test 3-11 of the Strong Wood Post Thrie Beam Guardrail written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the results of a crash test of a strong wood post thrie beam guardrail with a 2000-kg pickup truck impacting at a nominal speed and angle of 100 km/h and 25 degrees. This is the strength test for Test Level Three (TL-3) in NCHRP Report 350. It was found that the test results met all of the evaluation criteria. The pickup truck was smoothly redirected and remained upright.
Book Synopsis MASH Test 3-11 Evaluation of TxDOT W-beam Guardrail with 71⁄2-inch Diameter Round Wood Posts in Concrete Mow Strip by : Sana M. Moran
Download or read book MASH Test 3-11 Evaluation of TxDOT W-beam Guardrail with 71⁄2-inch Diameter Round Wood Posts in Concrete Mow Strip written by Sana M. Moran and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the testing reported herein was to assess the performance of the Texas Department of Transportation (TxDOT) W-beam guardrail with 71⁄2-inch diameter round wood posts in concrete mow strip according to the safety-performance evaluation guidelines included in the American Association of Safety Highway and Transportation Officials Manual for Assessing Safety Hardware (MASH) for Test Level Three (TL-3) longitudinal barriers. The crash test performed was in accordance with MASH Test 3-11, which involves a 2270P vehicle impacting the TxDOT W-beam guardrail with 71⁄2-inch diameter round wood posts in concrete mow strip at a target impact speed and impact angle of 62 mi/h and 25°, respectively. The TxDOT W-beam guardrail with 71⁄2-inch diameter round wood posts in concrete mow strip performed acceptably for MASH Test 3-11.
Author :American Association of State Highway and Transportation Officials Publisher :AASHTO ISBN 13 :1560514167 Total Pages :275 pages Book Rating :4.5/5 (65 download)
Book Synopsis Manual for Assessing Safety Hardware, 2009 by : American Association of State Highway and Transportation Officials
Download or read book Manual for Assessing Safety Hardware, 2009 written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 2009 with total page 275 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidelines for Shielding Bridge Piers by : Malcolm H. Ray
Download or read book Guidelines for Shielding Bridge Piers written by Malcolm H. Ray and published by . This book was released on 2018 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis NCHRP Report 350 Test 4-12 of the Modified Thrie Beam Guardrail by :
Download or read book NCHRP Report 350 Test 4-12 of the Modified Thrie Beam Guardrail written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the results of a crash test of a Modified Thrie Beam guardrail with an 8000-kg single unit truck impacting at a nominal speed and angle of 80 km/h and 15 degrees. This is the strength test for Test Level Four (TL-4) in NCHRP Report 350. It was found that the test results met all of the evaluation criteria. The single unit truck was smoothly redirected and remained upright. Detailed drawings are presented for documentation and to facilitate implementation.
Book Synopsis Development of a MASH TL-3 Approach Guardrail Transition to a MASH TL-4 Steel Bridge Rail by : Jennifer D. Rasmussen
Download or read book Development of a MASH TL-3 Approach Guardrail Transition to a MASH TL-4 Steel Bridge Rail written by Jennifer D. Rasmussen and published by . This book was released on 2020 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Manual for Assessing Safety Hardware (MASH) Test Level 3 (TL-3) approach guardrail transition (AGT) was designed to connect the Midwest Guardrail System (MGS) to a MASH TL-4 steel-post, steel-tube, bridge rail, Type IL-OH. Two connection concepts were evaluated using the LS-DYNA finite element analysis computer software. The second concept was selected for further evaluation with full-scale crash testing, which included a previously-developed, thrie-beam, approach guardrail transition, modified HSS8x6x1/4 transition tube rails that aligned with the lower and middle bridge rail tubes, and new connection hardware designed to prevent vehicle snag during reverse-direction impacts. The critical impact points were selected using LS-DYNA for MASH test designation nos. 3-20 and 3-21 in the impact direction from the thrie-beam to the bridge rail. MASH test designation nos. 3-20 and 3-21 in the impact direction from the bridge rail to the thrie-beam AGT were determined to be non-critical. In test no. STBRT-1, the 2,404-lb small car impacted the AGT at a speed of 64.6 mph, an angle of 25.2 degrees, and at a location 21.3 in. upstream from post no. 19, thus resulting in an impact severity of 60.9 kip-ft. The small car was contained and redirected and resulted in a successful test according to MASH test designation no. 3-20 safety performance criteria. In test no. STBRT-2, the 5,007-lb quad cab pickup truck impacted the AGT at a speed of 62.7 mph, an angle of 24.9 degrees, and at a location 15.9 in. upstream from post no. 19, thus resulting in an impact severity of 116 kip-ft. The pickup truck was contained and redirected and resulted in a successful test according to MASH test designation no. 3-21 safety performance criteria.
Book Synopsis MASH 2016 Evaluation of the Modified Thrie Beam System by : Robert W. Bielenberg
Download or read book MASH 2016 Evaluation of the Modified Thrie Beam System written by Robert W. Bielenberg and published by . This book was released on 2020 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the evaluation of the New Jersey Department of Transportation (NJDOT) modified thrie beam (MTB) system in both a single-sided roadside configuration and a dual-sided median configuration under Manual for Assessing Safety Hardware 2016 (MASH 2016) Test-Level 3 (TL-3) criteria. The MTB system was previously tested and approved under National Cooperative Highway Research Program Report No. 350 TL-3 impact conditions. Two full-scale crash tests, test nos. MTB-1 and MTB-2, were conducted according to test designation nos. 3-11 and 3-10, respectively. In test no. MTB-1, a single-sided roadside barrier configuration was constructed using 81-in. long W6x8.5 steel posts at 75-in. post spacing, W14x22 blockouts, and 12-gauge guardrail sections. A 5,003-lb quad cab pickup truck impacted the critical impact point of the system at a speed of 62.9 mph and an angle of 25.4 deg. The test vehicle was satisfactorily captured and smoothly redirected. Therefore, test no. MTB-1 was deemed successful according to MASH 2016 TL-3 safety performance criteria. Test no. MTB-2 was conducted on a dual-sided median barrier configuration of the modified thrie beam. A 2,415-lb small car impacted the critical impact point of the system at a speed of 63.1 mph and an angle of 24.9 deg. The test vehicle was satisfactorily captured and smoothly.
Book Synopsis Development and Evaluation of MASH TL-4 Guardrail System by : Nauman Mansoor Sheikh
Download or read book Development and Evaluation of MASH TL-4 Guardrail System written by Nauman Mansoor Sheikh and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Researchers at the Texas A&M Transportation Institute (TTI) designed and tested a Manual for Assessing Safety Hardware (MASH) Test Level 4 (TL-4) compliant metal guardrail system. The researchers first developed several preliminary design concepts of the guardrail system, one of which was selected by the Texas Department of Transportation (TxDOT) for further development through simulation and crash testing. The researchers then developed a full-scale finite element model of the selected system and performed impact simulations under MASH TL-4 impact conditions. Using the results of these impact simulations, the researchers made further improvements to the guardrail design and developed the final system design details for crash testing. TTI then constructed the guardrail installation and performed MASH Test 4-12 with a single unit truck, MASH Test 4-11 with a pickup truck, and MASH Test 4-10 with a small car to meet MASH TL-4 compliance criteria for longitudinal barriers. This report provides details of the guardrail design development, the crash tests and results, and the performance assessment of the guardrail system for MASH TL-4 longitudinal barrier evaluation criteria. The design developed under this research project provides a MASH TL-4 compliant guardrail system that allows TxDOT to provide enhanced roadside safety in corridors that experience above-average heavy vehicle traffic.
Book Synopsis Phase II Development of a Bullnose Guardrail System for Median Applications by : Bob W. Bielenberg
Download or read book Phase II Development of a Bullnose Guardrail System for Median Applications written by Bob W. Bielenberg and published by . This book was released on 1998 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research study consisted of Phase II of the development and full-scale vehicle crash testing of a bullnose barrier concept for the treatment of median hazards. The bullnose guardrail consisted of a 12-gauge thrie beam rail supported by twenty-two wood posts, eleven posts on each side of the system. Horizontal slots were cut in the valleys of selected thrie beam sections to aid in vehicle capture as well as to reduce the buckling and bending capacities of the rail. Two full-scale crash tests were performed, both using a 2000-kg pickup truck. The first crash test, impacting at a speed of 100.2 km/h and an angle of 0 degrees, was unsuccessful following the rupture of the thrie beam and subsequent uncontrolled penetration of the vehicle behind the barrier. Computer simulation of the failed test was performed using LS-DYNA. Analysis of the simulation and full-scale test results led to the addition of two steel cables placed behind the top and middle humps of the thrie beam nose section to aid in truck containment without stiffening the barrier. Computer simulation of the modified design demonstrated successful containment of the pickup truck. The second test, impacting at a speed of 103.5 km/h and an angle of 0 degrees was determined to be successful according to the safety standards set forth by the Test Level 3 (TL-3) evaluation criteria described in the NCHRP Report No. 350, "Recommended Procedures for the Safety Performance Evaluation of Highway Features" (1993). The next phase of the bullnose barrier system design will be to complete the remaining crash tests needed for compliance with the NCHRP Report No. 350 safety standards for median barriers.
Book Synopsis Extending TL-2 Short Radius Guardrail to Larger Radii by : Cody S. Stolle
Download or read book Extending TL-2 Short Radius Guardrail to Larger Radii written by Cody S. Stolle and published by . This book was released on 2014 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Association of State Highway and Transportation Officials Publisher :AASHTO ISBN 13 :1560514698 Total Pages :38 pages Book Rating :4.5/5 (65 download)
Book Synopsis LRFD Guide Specifications for the Design of Pedestrian Bridges by : American Association of State Highway and Transportation Officials
Download or read book LRFD Guide Specifications for the Design of Pedestrian Bridges written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 2009 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design of Highway Bridges by : Richard M. Barker
Download or read book Design of Highway Bridges written by Richard M. Barker and published by John Wiley & Sons. This book was released on 2013-02-04 with total page 1194 pages. Available in PDF, EPUB and Kindle. Book excerpt: Up-to-date coverage of bridge design and analysis revised to reflect the fifth edition of the AASHTO LRFD specifications Design of Highway Bridges, Third Edition offers detailed coverage of engineering basics for the design of short- and medium-span bridges. Revised to conform with the latest fifth edition of the American Association of State Highway and Transportation Officials (AASHTO) LRFD Bridge Design Specifications, it is an excellent engineering resource for both professionals and students. This updated edition has been reorganized throughout, spreading the material into twenty shorter, more focused chapters that make information even easier to find and navigate. It also features: Expanded coverage of computer modeling, calibration of service limit states, rigid method system analysis, and concrete shear Information on key bridge types, selection principles, and aesthetic issues Dozens of worked problems that allow techniques to be applied to real-world problems and design specifications A new color insert of bridge photographs, including examples of historical and aesthetic significance New coverage of the "green" aspects of recycled steel Selected references for further study From gaining a quick familiarity with the AASHTO LRFD specifications to seeking broader guidance on highway bridge design Design of Highway Bridges is the one-stop, ready reference that puts information at your fingertips, while also serving as an excellent study guide and reference for the U.S. Professional Engineering Examination.
Book Synopsis Development of a MASH Test Level 4 Steel, Side-mounted, Beam-and-post, Bridge Rail by : Oscar Pena
Download or read book Development of a MASH Test Level 4 Steel, Side-mounted, Beam-and-post, Bridge Rail written by Oscar Pena and published by . This book was released on 2020 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new steel, side-mounted, beam-and-post, bridge rail was designed, crash-tested, and evaluated according to safety performance guidelines included in the American Association of State Highway and Transportation Officials Manual for Assessing Safety Hardware, Second Edition (MASH 2016) for Test Level 4 (TL-4). The new bridge rail system was designed to be compatible with multiple concrete bridge decks utilized by the States of Illinois and Ohio. Bridge rail configurations were designed and optimized based on weight per foot, constructability, and safety. Post-to-rail and rail-to-rail connections were designed for the new bridge rail. Several concepts for these connections were configured, and after discussion with representatives from Illinois and Ohio Departments of Transportation, a preferred concept was selected for full-scale crash testing with a single-unit truck (SUT), a pickup truck, and a small car. The new bridge rail consisted of three tubular steel rail elements supported by W6x15 (W150x22.5) steel posts mounted to the exterior, vertical edge of the concrete deck and spaced at 8 ft (2.4 m) on centers. The top rail element was an HSS 12-in. x 4-in. x 1⁄4-in. (HSS 304.8-mm x 101.6-mm x 6.4-mm) and the lower two rail elements were HSS 8-in. x 6-in. x 1⁄4-in. (HSS 203.2-mm x 152.4-mm x 6.4-mm). The centerline heights of the rail elements were 37 in. (940 mm), 28 in. (711 mm), and 16 in. (406 mm) above the surface of the deck for the top, middle, and bottom rails, respectively. Four MASH 2016 TL-4 crash tests were performed on the new bridge rail, which successfully contained and redirected each of the MASH 2016 TL-4 vehicles. All occupant risk measures and evaluation criteria were within MASH 2016 limits. In the initial run of test designation no. 4-12, test no. STBR-1 with the SUT, the impact severity did not meet the minimum limit of 142.0 kip-ft (180.6 kJ). Thus, test designation no. 4-12 was re-run in test no. STBR-4, and the results met all MASH 2016 impact safety criteria, ensuring that the new bridge rail meets MASH 2016 TL-4 standards.
Book Synopsis Performance Evaluation of NCDOT W-beam Guardrails Under MASH TL-2 Conditions by : Howie Fang
Download or read book Performance Evaluation of NCDOT W-beam Guardrails Under MASH TL-2 Conditions written by Howie Fang and published by . This book was released on 2013 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design of Roadside Barrier Systems Placed on MSE Retaining Walls by : Roger P. Bligh
Download or read book Design of Roadside Barrier Systems Placed on MSE Retaining Walls written by Roger P. Bligh and published by Transportation Research Board. This book was released on 2010 with total page 195 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Report 663: Design of Roadside Barrier Systems Placed on MSE Retaining Walls explores a design procedure for roadside barrier systems mounted on the edge of a mechanically stabilized earth (MSE) wall. The procedures were developed following American Association of State Highway and Transportation Officials Load and Resistant Factor Design (LRFD) practices. Appendices A through H to NCHRP Report 663 are available online. Titles of Appendices A through H are as follows: Appendix A: Design of MSE Wall; Appendix B: State-of-Practice Survey; Appendix C: Detailed Drawing of MSE Wall for Bogie Test; Appendix D: Bogie Test MSE Wall Construction Procedure; Appendix E: Detailed Drawing of MSE Wall for TL-3 Test; Appendix F: TL-3 MSE Wall Construction Procedure; Appendix G: Crash Test Vehicle Properties and Information; Appendix H: Crash Test Sequential Photographs--
