| 摘要 |
A collapsible roadway impact attenuator (10, 100) includes an array of spaced parallel support elements (18, 116) arranged to move axially when the attenuator (10, 100) is struck by impacting vehicle. Elastomeric energy absorbing sheets (50, 114) are rigidly secured between adjacent support elements (18, 116) so as to extend axially and horizontally. When the attenuator (10, 100) is struck axially by a vehicle, the support elements (18, 116) move towards one another and the energy absorbing sheets (50, 114) form at least three inflections (58a, 58b, 58c, 118), thereby enhancing energy absorbing efficiency of the attenuator (10, 100). Tethers (112) can be mounted between overlying elastomeric sheets (114) to increase the number of inflections (118) and the energy efficiency of the attenuator (110). <IMAGE> |
