Characterisation Of Connection Mechanisms
Within Road Safety Barriers
Author(s)
D. A. F. Bayton, M. Lawrence & G. Fourlaris
Abstract
The performance of road safety barrier connections is not directly linked to
advances in vehicle technology. The UK government has recently released a new
vehicle restraint systems specification that has resulted in the transfer of design
responsibility to industrial safety barrier manufacturers. Road safety barrier
connections utilise slotted holes that are perpendicular to the direction of the
safety barrier beam profile. The bolt is significantly smaller than the slot and
different performance outcomes can result from the positioning and preloading
of the bolt with relation to the slotted hole.
Finite element models have been constructed and validated using theoretical
data as well as experimental data produced using a series of laboratory tests. The
finite element model has been based on a standard test coupon that incorporates a
full size safety barrier connection slot to industry standard dimensions.
The laboratory results showed that the maximum force and displacement of
the connections are comparable to the finite element model predictions.
Comparisons made between the independent testing of safety barrier connections
and the laboratory test coupons indicated that there was a good preliminary
correlation between the computer model and the laboratory test coupons.
Subsequently a simplified approach has been applied to the finite element
modelling method with respect to connection movement mechanisms.
Keywords: safety barrier, crash, steel, finite element analysis, connection,
fastener.
Keywords
safety barrier, crash, steel, finite element analysis, connection,
fastener.
Related Book
Other papers in this volume
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