Development and Testing of the Manitoba Constrained Width Tall Wall Barrier

2017 ◽  
Vol 2638 (1) ◽  
pp. 55-64
Author(s):  
Scott K. Rosenbaugh ◽  
Jennifer D. Schmidt ◽  
Harald P. Larsen ◽  
Ronald K. Faller ◽  
Andrew Pankratz
Keyword(s):  
Bridge Deck ◽  
Performance Standards ◽  
Full Scale ◽  
Crash Test ◽  
System A ◽  
Concrete Barrier ◽  
Test Level ◽  
Base Width

This project in Manitoba, Canada, developed a single-slope concrete barrier system with a height of 1,250 mm and a base width of no more than 600 mm. Configurations for bridge rail, roadside, and median barrier applications were developed and optimized to minimize installation costs while satisfying the AASHTO Manual for Assessing Safety Hardware (MASH) Test Level 5 performance standards. Additionally, a bridge deck was developed for the overhang portion of the deck supporting the bridge rail. To evaluate the new barrier system, a 45.7-m-long section of the bridge rail was constructed on a simulated bridge deck and subjected to a full-scale crash test according to MASH Test 5-12. During the test, the 36,000-kg vehicle was safely redirected with minimal roll to the cab and trailer. Damage to the barrier and deck was minor, consisting of concrete gouging, hairline cracks, and some spalling to the top of the barrier. Thus, the Manitoba constrained width tall wall was deemed crashworthy to MASH Test Level 5 standards.

Test Level 4 Bridge Rails

2000 ◽  
Vol 1720 (1) ◽  
pp. 80-94
Author(s):  
C. Eugene Buth ◽  
Wanda L. Menges ◽  
William F. Williams
Keyword(s):  
Full Scale ◽  
Safety Performance ◽  
Crash Test ◽  
Test Results ◽  
Recent Past ◽  
Design Specifications ◽  
Performance Requirements ◽  
Steel Tubing ◽  
Aashto Lrfd ◽  
Test Level

Design details and full-scale crash test results are presented for three bridge rails tested for compliance with NCHRP Report 350 Test Level 4 requirements. Designs of these rails are based on AASHTO LRFD Bridge Design Specifications. Each bridge rail consists of structural steel tubing rail elements mounted on wide-flange posts. The rails are generally stronger than many designs commonly used in the recent past. Full-scale crash test results demonstrated that all bridge rails meet NCHRP Report 350 safety performance requirements.

NCHRP Report 350 Crash Test Results for Connecticut Truck-Mounted Attenuator

1996 ◽  
Vol 1528 (1) ◽  
pp. 52-60
Author(s):  
John F. Carney ◽  
Charles E. Dougan ◽  
Eric C. Lohrey
Keyword(s):  
Full Scale ◽  
Test Series ◽  
Crash Test ◽  
Test Results ◽  
Impact Attenuation ◽  
Crash Tests ◽  
Test Level ◽  
Level 2

The results of four full-scale crash tests performed on the Connecticut Truck Mounted Attenuator (CTMA) are summarized. The tests were conducted in accordance with the guidelines of NCHRP Report 350 for Test Level 2 devices. NCHRP Report 350 specifies two required and two optional tests. The four crash tests passed all requirements of NCHRP Report 350. No repeat tests were required, and the results were uniformly excellent. The successful CTMA test series is the first of several NCHRP Report 350 test programs that are anticipated to gain compliance for various impact attenuation systems designed and developed in Connecticut.

Development of a Performance Rating Standard for Residential Fuel Cell Systems

2006 ◽  
Author(s):  
Michael W. Ellis ◽  
Mark W. Davis ◽  
A. Hunter Fanney ◽  
Brian P. Dougherty ◽  
Ian Doebber
Keyword(s):  
Fuel Cell ◽  
Performance Standards ◽  
Cell System ◽  
Fuel Cell System ◽  
Experimental Procedure ◽  
Cell Systems ◽  
Load Following ◽  
System A ◽  
Experimental Apparatus ◽  
Using Data

Fuel cell systems for residential applications are an emerging technology for which specific consumer-oriented performance standards are not well defined. This paper presents a proposed experimental procedure and rating methodology for evaluating residential fuel cell systems. In the proposed procedure, residential applications are classified as grid independent load following; grid connected constant power; grid connected thermal load following; and grid connected water heating. An experimental apparatus and procedures for steady state and simulated use tests are described for each type of system. A rating methodology is presented that uses data from these experiments in conjunction with standard residential load profiles to quantify the net effect of a fuel cell system on residential utility use. The experiments and rating procedure are illustrated using data obtained from a currently available grid connected thermally load following system.

Numerical Investigation of the Performance of a Roadside Safety Barrier Located Behind the Break Point of a Slope

2011 ◽  
Author(s):  
M. Mongiardini ◽  
J. D. Reid
Keyword(s):  
Numerical Investigation ◽  
Experimental Tests ◽  
Break Point ◽  
Full Scale ◽  
Crash Test ◽  
Construction Costs ◽  
Roadside Safety ◽  
The Road ◽  
Safety Barrier ◽  
Mechanically Stabilized

Numerical simulations allow engineers in roadside safety to investigate the safety of retrofit designs minimizing or, in some cases, avoiding the high costs related to the execution of full-scale experimental tests. This paper describes the numerical investigation made to assess the performance of a roadside safety barrier when relocated behind the break point of a 3H:1V slope, found on a Mechanically Stabilized Earth (MSE) system. A safe barrier relocation in the slope would allow reducing the installation width of the MSE system by an equivalent amount, thus decreasing the overall construction costs. The dynamics of a pick-up truck impacting the relocated barrier and the system deformation were simulated in detail using the explicit non-linear dynamic finite element code LS-DYNA. The model was initially calibrated and subsequently validated against results from a previous full-scale crash test with the barrier placed at the slope break point. After a sensitivity analysis regarding the role of suspension failure and tire deflation on the vehicle stability, the system performance was assessed when it was relocated into the slope. Two different configurations were considered, differing for the height of the rail respect to the road surface and the corresponding post embedment into the soil. Conclusions and recommendations were drawn based on the results obtained from the numerical analysis.

Comparison of Crash Test and Simulation Results for Impact of Silverado Pickup into New Jersey Barrier under Manual for assessing Safety Hardware

2012 ◽  
Vol 2309 (1) ◽  
pp. 114-126 ◽  
Author(s):  
Dhafer Marzougui ◽  
Cing-Dao (Steve) Kan ◽  
Kenneth S. Opiela
Keyword(s):  
New Jersey ◽  
Primary Objective ◽  
Crash Test ◽  
Fe Model ◽  
George Washington ◽  
Statistical Measures ◽  
Detailed Simulation ◽  
Analysis Center ◽  
Simulation Results ◽  
Concrete Barrier

The National Crash Analysis Center (NCAC) at the George Washington University simulated the crash of a 2,270-kg Chevrolet Silverado pickup truck into a standard 32-in. New Jersey shape concrete barrier under the requirements of Test 3–11 of the Manual for Assessing Safety Hardware (MASH). The new, detailed finite element (FE) model for the Chevrolet Silverado was used as the surrogate for the MASH 2270P test vehicle. An FE model of the New Jersey barrier was drawn from the array of NCAC hardware models. The primary objective of this analysis was to simulate the crash test conducted to evaluate how this commonly used, NCHRP 350–approved device would perform under the more rigorous MASH crashworthiness criteria. A secondary objective was to use newly developed verification and validation (V&V) procedures to compare the results of the detailed simulation with the results of crash tests undertaken as part of another project. The crash simulation was successfully executed with the detailed Silverado FE model and NCAC models of the New Jersey concrete barrier. Traditional comparisons of the simulation results and the data derived from the crash test suggested that the modeling provided viable results. Further comparisons employing the V&V procedures provided a structured assessment across multiple factors reflected in the phenomena importance ranking table. Statistical measures of the accuracy of the test in comparison with simulation results provided a more robust validation than previous approaches. These comparisons further confirmed that the model was able to replicate impacts with a 2270P vehicle, as required by MASH.

Finite Element Simulation of a Strong-Post W-Beam Guardrail System

SIMULATION ◽  
2002 ◽  
Vol 78 (10) ◽  
pp. 587-599 ◽  
Author(s):  
Ali O. Atahan
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Full Scale ◽  
Nonlinear Finite Element ◽  
Crash Test ◽  
Original Design ◽  
Dynamic Interactions ◽  
Crash Testing ◽  
Element Simulation ◽  
Test Requirements

Computer simulation of vehicle collisions has improved significantly over the past decade. With advances in computer technology, nonlinear finite element codes, and material models, full-scale simulation of such complex dynamic interactions is becoming ever more possible. In this study, an explicit three-dimensional nonlinear finite element code, LS-DYNA, is used to demonstrate the capabilities of computer simulations to supplement full-scale crash testing. After a failed crash test on a strong-post guardrail system, LS-DYNA is used to simulate the system, determine the potential problems with the design, and develop an improved system that has the potential to satisfy current crash test requirements. After accurately simulating the response behavior of the full-scale crash test, a second simulation study is performed on the system with improved details. Simulation results indicate that the system performs much better compared to the original design.

A novel full-scale external geothermal heating system for bridge deck de-icing

2021 ◽  
Vol 185 ◽  
pp. 116365
Author(s):  
Omid Habibzadeh-Bigdarvish ◽  
Xinbao Yu ◽  
Teng Li ◽  
Gang Lei ◽  
Aritra Banerjee ◽  
...  
Keyword(s):  
Bridge Deck ◽  
Heating System ◽  
Full Scale ◽  
Geothermal Heating

scholarly journals Experimental Behavior of Precast Bridge Deck Systems with Non-Proprietary UHPC Transverse Field Joints

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 6964
Author(s):  
Mohamed Abokifa ◽  
Mohamed A. Moustafa
Keyword(s):  
High Performance ◽  
Bridge Deck ◽  
High Performance Concrete ◽  
Experimental Testing ◽  
Bridge Decks ◽  
Transverse Field ◽  
Full Scale ◽  
Bridge Construction ◽  
Vertical Loading ◽  
Precast Bridge Deck

Full-depth precast bridge decks are widely used to expedite bridge construction and enhance durability. These deck systems face the challenge that their durability and performance are usually dictated by the effectiveness of their field joints and closure joint materials. Hence, commercial ultra-high performance concrete (UHPC) products have gained popularity for use in such joints because of their superior mechanical properties. However, the proprietary and relatively expensive nature of the robust UHPC mixes may pose some limitations on their future implementation. For these reasons, many research agencies along with state departments of transportation sought their way to develop cheaper non-proprietary UHPC (NP-UHPC) mixes using locally supplied materials. The objective of this study is to demonstrate the full-scale application of the recently developed NP-UHPC mixes at the ABC-UTC (accelerated bridge construction university transportation center) in transverse field joints of precast bridge decks. This study included experimental testing of three full-scale precast bridge deck subassemblies with transverse NP-UHPC field joints under static vertical loading. The test parameters included NP-UHPC mixes with different steel fibers amount, different joint splice details, and joint widths. The results of this study were compared with the results of a similar proprietary UHPC reference specimen. The structural behavior of the test specimens was evaluated in terms of the load versus deflection, reinforcement and concrete strains, and full assessment of the field joint performance. The study showed that the proposed NP-UHPC mixes and field joint details can be efficiently used in the transverse deck field joints with comparable behavior to the proprietary UHPC joints. The study concluded that the proposed systems remained elastic under the target design service and ultimate loads. In addition, the study showed that the use of reinforcement loop splices enhanced the load distribution across the specimen’s cross-section.

Sign in / Sign up

Export Citation Format

Share Document