My questions are pertaining to design of semi-rigid barrier (w-beam type & thrie type) for :
case-I Normal Containment as per IRC(i.e. vehicle mass=15KN and velocity at impact=110kmph and 20 degree angle of impact)
Case-II High Containment (i.e. vehicle mass=300KN and velocity at impact=60kmph and 20 degree angle of impact)
(1). What shall be the stiffness of the vehicle and stiffness of the barrier considering W-beam and thrie beam barriers and how the stiffness varies? (2) How many posts shall be taken into consideration as being effective in successful countering the vehicle crash?
(3) What is the height of impact?
This is not directly related to w-beam or thrie types of barriers, but as part of a study of roadway delineation including roadside vegetation, we made some very preliminary explorations of using certain types of roadside vegetation for barriers as well as visual guidance including glare screening:
http://www.tandfonline.com/doi/abs/10.1080/15568318.2011.649444
In Germany we have a standard for safety barriers which is RPS 2009 and can be downloaded from the Federal Highway Research Institute, a link to an English short-description is attached (www.bast.de....). A more detailled presentation in English is given in www. seetoint....
http://www.seetoint.org/wp-content/uploads/downloads/2012/11/910_ii-design-principles-passive-safety.pdf
http://www.bast.de/EN/Traffic_Engineering/Subjects/schutzeinrichtungen.html?nn=604752
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