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Evaluation Of Permanent Concrete Barriers To Mash 2016
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Book Synopsis Evaluation of Permanent Concrete Barriers to MASH 2016 by : Samuel E Hovde
Download or read book Evaluation of Permanent Concrete Barriers to MASH 2016 written by Samuel E Hovde and published by . This book was released on 2021 with total page 323 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research project was to develop evaluation criteria for permanent concrete barriers to MASH 2016 TL-3 and TL-4 without crash testing and then to evaluate permanent concrete barrier standards provided by the sponsoring agencies of the Midwest Pooled Fund Program. A literature review was conducted to determine evaluation criteria for stability, shape, strength, and anchorage, and a database of permanent concrete barrier crash tests was compiled. A survey was conducted to collect barrier standards from the members of the Midwest Pooled Fund Program, and barriers were selected and evaluated according to the determined methodology. A total of 85 permanent concrete barrier detail variations were evaluated. 39 of the variations were deemed crashworthy to MASH TL-3, and an additional 27 barriers were deemed crashworthy to MASH TL-4. Computed strengths were calculated for each of the evaluated barriers and compared to the boundary of optimal strengths as determined from the AASHTO LRFD Bridge Design Specifications. The comparison was performed parametrically from a range of vertical and horizontal barrier flexural strength combinations. Significant strength overdesign was commonly observed throughout the details provided by the sponsoring agencies, suggesting that agencies could potentially reduce costs for many standard barrier configurations by reducing steel reinforcement.
Book Synopsis MASH TL-3 Evaluation of the Unreinforced, Single-slope Concrete Median Barrier by : Robert W. Bielenberg
Download or read book MASH TL-3 Evaluation of the Unreinforced, Single-slope Concrete Median Barrier written by Robert W. Bielenberg and published by . This book was released on 2018 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Ohio Department of Transportation (ODOT) requested an evaluation of an unreinforced, single-slope concrete median barrier capable of satisfying Test Level 3 (TL-3) safety requirements found in the Manual for Assessing Safety Hardware, Second Edition (MASH 2016). The barrier was designed with a height of 42 in. (1,067 mm), a base width of 28 in. (711 mm), and top width of 12 in. (305 mm). The tarmac surface was milled down 1 in. (25 mm) to accommodate the barrier and asphalt pad. The barrier was cast in place using concrete with a minimum compressive strength of 4,000 psi (27.6 MPa). Expansion joints were installed in 20-ft (6.1-m) intervals to simulate cracking and potential barrier discontinuities. An asphalt pad, installed on the milled surface using a tack coat, functioned as the barrier keyway and extended 96 in. (2,438 mm) from the traffic and back sides of the barrier. Previous testing of similar single-slope concrete barriers indicated that only one full-scale crash test (MASH test designation no. 3-11) was needed to satisfy TL-3 criteria. During the test, the 5,001-lb (2,268-kg) pickup impacted the installation at a speed of 62.8 mph (101.0 km/h) and at an angle of 24.9 degrees for an impact severity of 116.3 kip-ft (157.7 kJ). The vehicle was safely contained and redirected, and the test satisfied safety performance evaluation criteria of test designation no. 3-11 found in MASH 2016.
Book Synopsis Develop Guidelines for Inspection, Repair, and Use of Portable Concrete Barriers by : Chiara Silvestri Dobrovolny
Download or read book Develop Guidelines for Inspection, Repair, and Use of Portable Concrete Barriers written by Chiara Silvestri Dobrovolny and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the tests reported herein was to assess the performance of the damaged portable concrete barrier according to the safety-performance evaluation guidelines included in the American Association of State Highway and Transportation Officials Manual for Assessing Safety Hardware (MASH), Second Edition. The crash tests were performed in accordance with MASH Test 3-11, which involves a 2270P vehicle weighing 5000 lb impacting the longitudinal barrier while traveling at 62 mi/h and 25 degrees. This report provides details on the damaged portable concrete barriers, the crash tests and results, and the performance assessment of the damaged portable concrete barriers for MASH Test Level 3 (TL-3) longitudinal barrier evaluation criteria. The damaged portable concrete barriers met the performance criteria for MASH TL-3 longitudinal barriers.
Book Synopsis MASH TL-3 Evaluation of Concrete and Asphalt Tied-down Anchorage for Portable Concrete Barrier by : Robert W. Bielenberg
Download or read book MASH TL-3 Evaluation of Concrete and Asphalt Tied-down Anchorage for Portable Concrete Barrier written by Robert W. Bielenberg and published by . This book was released on 2019 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research was to evaluate Wisconsin DOT’s F-shaped portable concrete barriers (PCBs) with a bolt-through, tie-down anchorage system for concrete road surfaces with a reduced embedment epoxy anchorage and a steel pin tie-down anchorage system for asphalt surfaces according to Manual for Assessing Safety Hardware 2016 (MASH 2016) Test Level 3 (TL-3) test designation no. 3-11 criteria. Test no. WITD-1 consisted of PCBs with a bolt-through, tie-down configuration on concrete tarmac. The system was installed with the rear toe of the PCBs placed 1 in. (25 mm) away from the edge of the simulated bridge deck. Barrier nos. 5 through 13 were attached on the traffic side with three 1 1/8-in. (29-mm) diameter A307 Grade A threaded rods per barrier epoxied into the concrete with an embedment depth of 51⁄4 in. (133 mm). The test results for test no. WITD-1 showed that the system sufficiently contained and redirected the 2270P vehicle with controlled lateral displacements of the barrier, and the barrier system was deemed acceptable according to MASH 2016 TL-3 criteria. Test no. WITD-2 consisted of PCBs with a pinned, tie-down configuration placed on a 2-in. (51-mm) thick asphalt pad. The rear toe of the PCBs were installed 6 in. (152 mm) from the edge of a 36-in. wide x 36-in. deep (914-mm x 914-mm) trench. Barrier nos. 6 through 14 were anchored on the traffic side of the system with three 11⁄2-in. (38-mm) diameter steel pins driven through the bolt anchor pockets on each barrier. During test no. WITD-2 the wheel well and toe pan were deformed a maximum of 131⁄2 in. (343 mm), which surpassed the MASH 2016 deformation limits. Due to the deformation, test no. WITD-2 was deemed unacceptable under the MASH 2016 TL-3 test designation no. 3-11 safety criteria. Potential barrier modifications for improving the performance were noted for future research.
Book Synopsis Development of a Temporary Concrete Barrier to Permanent Concrete Median Barrier Approach Transition by :
Download or read book Development of a Temporary Concrete Barrier to Permanent Concrete Median Barrier Approach Transition written by and published by . This book was released on 2010 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis MASH 2016 Test Level 3 and Test Level 4 Evaluation of Roadside Safety Barrier with Pedestrian Features by : Miguel A Hinojosa
Download or read book MASH 2016 Test Level 3 and Test Level 4 Evaluation of Roadside Safety Barrier with Pedestrian Features written by Miguel A Hinojosa and published by . This book was released on 2021 with total page 545 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 Evaluation of Roadway Concrete Barriers and Materials by : Vista Shahriari
Download or read book Evaluation of Roadway Concrete Barriers and Materials written by Vista Shahriari and published by . This book was released on 2021 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Zone of Intrusion for Permanent 9.1-degree Single-slope Concrete Barriers by : Cale J. Stolle
Download or read book Zone of Intrusion for Permanent 9.1-degree Single-slope Concrete Barriers written by Cale J. Stolle and published by . This book was released on 2014 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis MASH 2016 Test Level 4 Evaluation of MNDOT Concrete Parapet with Brush Curb and Upper Beam and Post Rail with New Tapered End Section by : Miguel A. Hinojosa
Download or read book MASH 2016 Test Level 4 Evaluation of MNDOT Concrete Parapet with Brush Curb and Upper Beam and Post Rail with New Tapered End Section written by Miguel A. Hinojosa and published by . This book was released on 2021 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Minnesota Department of Transportation (MnDOT) desires to use a concrete parapet with a brush curb, upper beam and post rail, and a new tapered end section along high-speed highways and roadways when bridge structures are encountered. The MnDOT combination bridge railing system was full-scale crash tested according to the Test Level 4 (TL-4) procedures described in the Manual for Assessing Safety Hardware (MASH 2016). The combination bridge railing system consisted of a 21-in. tall concrete parapet with a 6-in. tall and 2-in. wide brush curb at the lower front face and eight rail and post assemblies, which consisted of one steel rail welded onto two or three steel posts with their own welded base plates. The steel assemblies were anchored to the top face of the concrete parapet. In full-scale crash test nos. MNCBR-1, MNCBR-2, and MNCBR-3, the bridge railing system was evaluated according to MASH 2016 test designation nos. 4-12, 4-11, and 4-10, respectively. The 2013 International Durastar 4300 SBA single-unit truck impacted the system 60 1/8 in. upstream from the centerline of the splice between post nos. 6 and 7 with a speed of 57.4 mph at an angle of 15.4 degrees. The 2014 Dodge Ram 1500 crew cab pickup truck impacted the system 69.9 in. upstream from the centerline of post no. 23 with a speed of 63.9 mph at an angle of 25.1 degrees. The 2009 Kia Rio small car impacted the system 70 7/16 in. upstream from the centerline of post no. 23 with a speed of 62.5 mph at an angle of 25.5 degrees. The vehicles were successfully contained and redirected, resulting in minimal plastic deformation to the upper steel railing and moderate to minimal scraping and gouging of the concrete parapet. The combination bridge railing system was found to meet the AASHTO MASH 2016 TL-4 impact safety criteria.
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 Distress Evaluation of Roadway Concrete Barriers and Materials by : Vista Shahriari
Download or read book Distress Evaluation of Roadway Concrete Barriers and Materials written by Vista Shahriari and published by . This book was released on 2021 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: Single-slope slip-formed concrete barriers are widely used in Wisconsin. This roadside safety ancillary structure is deteriorating at a very fast pace at an early age which could significantly reduce their service life. The most common observed distress along these barriers across different regions of WI are vertical cracks, horizontal cracks, and map cracking. These premature deteriorations of the barriers not only add extra costs due to maintenance and early replacement requirements but could also reduce their crash performance and increase the probability of fatality. This study was conducted to investigate the causes and sources of distress observed in single-slope slip-formed roadway concrete barriers with the goal of developing strategies to ensure the long-term performance of these barriers in Wisconsin. To that end, barriers built between 2012 and 2015 which are located in three different regions of WI were studied. A state-wide survey, field inspection of the barriers, non-destructive evaluations, as well as laboratory tests of concrete cores and powder samples were performed to determine and characterize the main types of concrete distress in barriers studied and investigated the reasons for this premature deterioration. In addition, finite element analysis was conducted to evaluate the effect of few selected barrier design parameters such as rebar layout on induced stresses and expected crack openings due to ambient temperature change. Based on the findings, several recommendations are presented which include improving construction practices, inspection, and quality control during construction, following concrete specifications, improving data collection during barrier construction, limiting the size of aggregates, modifications to the amount of horizontal reinforcement, and heat of hydration of cement.
Book Synopsis Evaluation of a Movable Concrete Barrier System by : Benjamin H. Cottrell
Download or read book Evaluation of a Movable Concrete Barrier System written by Benjamin H. Cottrell and published by . This book was released on 1994 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The movable concrete barrier (MCB) system consists of 1-m-long sections of barrier connected by steel pins in hinges to form a barrier wall that is moved laterally with a transport/transfer vehicle. The MCB system allows for the quick closing and opening of a lane for construction work. A 1-km section of barrier can be laterally positioned in about 10 minutes. This system aids in the safe maintenance and reconstruction of highways with minimum inconvenience to the motoring public by limiting lane closures to the non-peak periods. The Virginia Department of Transportation and its contractors used the MCB system on two road-widening projects on I-66 in Fairfax County. The objectives of this research were to evaluate the effectiveness of the MCB system and to develop guidelines for its use. The costs associated with the use of the system along with problems and benefits were examined. The results of the study showed that the MCB system performed adequately in its transfer operations, in redirecting errant vehicles, and in protecting the construction workers. Some general guidelines were developed for using the MCB system. The MCB system should be used on high volume, congested freeways (1) where there is a need for barrier protection and quick opening and closing of lanes or (2) where there is a need for a median barrier that can be quickly shifted.
Book Synopsis NCHRP Report 350 Test 3-11 of the Washington Type 2 Concrete Barrier by : Delbert Lance Bullard
Download or read book NCHRP Report 350 Test 3-11 of the Washington Type 2 Concrete Barrier written by Delbert Lance Bullard and published by . This book was released on 2001 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two crash tests are required to evaluate portable concrete barriers, such as Washington Department of transportation (WsDOT) Type 2 concrete barriers, to NCHRP Report 350 test level three (TL-3). NCHRP Report 350 test designation 3-10 involves an 820 kg passenger vehicle impacting the critical impact point (CIP) of the length of need (LON) section at a nominal speed and angle of 100 km/h and 20 degrees. NCHRP Report 350 test designation 3-11 involves a 2000 kg pickup truck impacting the CIP of the LON section at a nominal speed and angle of 100 km/h and 25 degrees. Finite element analysis using LS-DYNA was used to simulate NCHRP Report 350 test designation 3-11 with the 2000 kg pickup truck on the standard Type 2 concrete barrier with a pin and loop connection and two modified pin and loop connections. In subsequent full-scale crash tests, both the standard and a modified concrete barrier met the evaluation criteria of NCHRP Report 350 for Test 3-11. For each of the two pin and loop configurations crash tested, the Washington Type 2 concrete barrier met the evaluation criteria of NCHRP Report 350 for test 3-11.
Book Synopsis Development and MASH TL-4 Evaluation of TxDOT Large-scupper Median Barrier for Flood-prone Areas by : Chiara Silvestri Dobrovolny
Download or read book Development and MASH TL-4 Evaluation of TxDOT Large-scupper Median Barrier for Flood-prone Areas written by Chiara Silvestri Dobrovolny and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete median barriers are designed to mitigate serious cross-median crashes by preventing penetration of errant vehicles into oncoming traffic. When implemented in flood-prone areas, however, solid concrete median barriers can act as a dam to floodwaters, as recently seen in Texas during Hurricane Harvey or in Louisiana and Pennsylvania following severe storms. These severe weather events raise the height of floodwaters and increase the severity of flooding on highways and surrounding roads and communities. In this study, new median barrier options with openings were investigated as a way to reduce flooding. Finite element simulations were used to aid investigation and evaluation of the designs, and laboratory testing was performed to evaluate the hydraulic efficiency of barrier designs in a variety of simulated flood conditions. A concrete single-slope profile median barrier with a large scupper was selected for crash testing following Manual for Assessing Safety Hardware (MASH) Test Level 4 impact conditions and evaluation criteria. The median barrier design was deemed MASH compliant and is ready for implementation in areas susceptible to flooding, with the goals of reducing flooding severity, decreasing associated risk to motorists, and reducing the level of flood damage to both highways and surrounding areas.
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 Guide for the Planning, Design, and Operation of Pedestrian Facilities by :
Download or read book Guide for the Planning, Design, and Operation of Pedestrian Facilities written by and published by AASHTO. This book was released on 2004 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
