Major high-speed roads are prevalent in urban areas, and thus there are space constraints in roadside design, particularly when the roadside needs to accommodate both road safety barriers and road noise barriers. A combined road safety barrier and road noise barrier structure is termed a Safety Noise Barrier (SNB). This study was established to better understand the issues surrounding structural design of SNBs, with a particular emphasis on crashworthy SNBs that are capable of achieving a crash test level rating of Test Level 5 (TL-5). A theoretical impact loading model was created after reviewing crash test literature and conducting an indicative vehicle- SNB crash simulation. A design load of 500 kN was established. Incorporating some design scope limitations, nine SNB options were developed, and these were priced and analysed through an eight-variable multi-criteria analysis process. A cost analysis found that SNB options based on a standard slip-formed TL-5 concrete barrier were cheaper than the systems based on discrete posts with longitudinal rails. Also, the use of the TL-5 single slope barrier as a safety barrier element was preferred to the discrete post arrangements. Rigid SNB systems were also clearly favoured over flexible and partially flexible systems.
Feasibility assessment of various TL-5 safety noise barrier (SNB) designs
Road & transport research ; 26 , 2
2017
Article (Journal)
English
Local classification TIB: | 135/7005/1710 | |
BKL: | 55.84 Straßenverkehr |
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