Performance Evaluation Of The Free Standing Temporary Barrier Update To Nchrp 350 Test No 3 11 2214tb 1
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| Author | : United States. Federal Highway Administration |
| Publisher | : |
| Total Pages | : 276 |
| Release | : 1975 |
| Genre | : Highway engineering |
| ISBN | : |
This roadside safety design package has been developed to satisfy a need for training in this area. It is hoped that all persons involved in the design, construction, operation, and maintenance of highways will become familiar with the concepts contained in the program. The concepts and practices discussed come from those contained in the AASHTO publication, "Highway Design and Operational Practices Related to Highway Safety". They are discussed in considerable depth in this program and should provide a good working knowledge of roadside safety design. Much of the program is oriented around freeways; however, the principles apply equally toward the lower order highway.
| Author | : |
| Publisher | : |
| Total Pages | : |
| Release | : 2015 |
| Genre | : Low-volume roads |
| ISBN | : 9780309295710 |
| Author | : National Research Council (U.S.). Transportation Research Board |
| Publisher | : |
| Total Pages | : 56 |
| Release | : 1978 |
| Genre | : Transportation |
| ISBN | : |
| Author | : Agnes Nolan |
| Publisher | : |
| Total Pages | : 0 |
| Release | : 2015-03-14 |
| Genre | : Technology & Engineering |
| ISBN | : 9781632382146 |
Various aspects of geotechnical earthquake engineering and soil dynamics are highlighted in this all-inclusive book. The current progress in the field of earthquake engineering has been discussed with primary focus on the seismic safety of dams and underground monuments, Bryan's effect, and the mitigation plans against landslide and fire whirlwind. The book discusses various interesting researches that have been contributed by researchers and experts from many countries. The researches presented in this book will be helpful for graduates, researchers and scientists working in these areas of structural and earthquake engineering. It will also be of significance to civil engineers working on building and reconstruction of structures such as dams, buildings, roads and others.
| Author | : Eugene Buth |
| Publisher | : |
| Total Pages | : 102 |
| Release | : 2003 |
| Genre | : Roads |
| ISBN | : |
The existing Montana Department of Transportation (DOT) concrete median barrier sections are 3.048 m (10 ft) long New Jersey shaped barriers with a pin-and-loop connection. Two pairs of 25 mm (1 in.) diameter wire rope loops are connected using a 660 mm (26 in.) long, 25 mm (1 in.) diameter pin that is not restrained at the bottom. Since the system has a low probability of complying with the NCHRP Report 350 guidelines, and the expected dynamic barrier deflection under design impact conditions is greater than desired by Montana DOT, two alternate barrier connection concepts were proposed and evaluated using computer simulations. These included a modified pin-and-loop connection and a newly conceived lapped splice connection. After these two designs appeared to perform acceptably during simulation, the proposed designs were constructed for full-scale crash testing to determine whether the designs would actually meet NCHRP Report 350 crash test criteria. This report presents the details of the simulation analysis, the details of the proposed barrier designs, the details of the full-scale crash tests, and the NCHRP Report 350 evaluation of each of the tests. Both the modified pin-and-loop barrier and the lapped splice connection barrier performed acceptably for NCHRP Report 350 test 3-11.
| Author | : Chuck A. Plaxico |
| Publisher | : |
| Total Pages | : 198 |
| Release | : 2006 |
| Genre | : Concrete |
| ISBN | : |
For roadside work-zones in areas that have opposing traffic flow, safety is enhanced if the temporary barriers incorporate a "glare-shield" that blocks headlight glare from opposing traffic. Currently-available 32-inch portable concrete barriers require the use of an add-on glare shield attached to the top of the barrier. The add-on glare shields are an extra expense and complicate barrier set-up and handling. An alternative solution was to develop a 50-inch high portable concrete barrier which is tall enough to serve as its own glare-shield. Finite element analysis was used to investigate various barrier shapes and connection schemes to identify a successful crashworthy design that would meet requirments of NCHRP Report 350 Test level 3. A 50-inch portable concrete barrier design was developed based on the results of the finite element analyses and was crash tested at the Transportation Research Center in East Liberty, Ohio. The system successfully met all safety criteria of NCHRP Report 350 and has been approved by the Federal Highway Administration for use on the National Highway System as a test level 3 device.
| Author | : Kenneth H. Addink |
| Publisher | : |
| Total Pages | : 72 |
| Release | : 1998 |
| Genre | : Anchorage (Structural engineering) |
| ISBN | : |
The safety shape portable concrete barrier (PCB) has been approved for use when placed on a bituminous or concrete pad. Construction personnel would like to use PCBs in temporary situations along roadways where the use of a bituminous or concrete pad is impractical and costly. However, when PCBs are placed on soil foundations with no anchorage, they tend to dig into the soil, causing the barrier sections to rotate or overturn. The objective of this research was to develop a device which will allow temporary PCBs placed on soil foundations to translate without significant rotation when impacted by errant vehicles. This device was developed and successfully tested to Test Level 3 of the National Cooperative Highway Research Program (NCHRP) Report No. 350.
| Author | : Christopher Lohse |
| Publisher | : |
| Total Pages | : 182 |
| Release | : 2006 |
| Genre | : |
| ISBN | : |
| Author | : Misty L. Butler |
| Publisher | : |
| Total Pages | : 42 |
| Release | : 2005 |
| Genre | : Roads |
| ISBN | : |
| Author | : |
| Publisher | : |
| Total Pages | : 172 |
| Release | : 1998 |
| Genre | : Impact |
| ISBN | : |
Two approach guardrail transitions for use with concrete safety shape barriers were developed and crash tested. For this study, the transition systems were attached to the New Jersey safety shape concrete barrier; however, it is believed that these transition systems could be easily adapted to the F-shape barrier with no need for further crash testing. Both transition designs were constructed with two nested thrie beam rails measuring 2.66-mm thick. The first transition design was supported by nine W150x13.5 steel posts measuring, 1,981-mm long, while the second transition design was supported by nine 152-mm x 203-mm wood posts measuring 2,134-mm long. For both systems, post spacings consisted on one at 292 mm, five at 476 mm, and three at 952 mm. A triangular-shape concrete curb was constructed below the thrie beam rail on each approach guardrail transition system. The two transition systems successfully met the Test Level 3 requirements specified in NCHRP Report 350, "Recommended Procedures for the Safety Performance Evaluation of Highway Features."
