Researchers use finite element analysis to lead the design of the limited deflection cross-bolted connection. Simulation results show good correlation to crash test results.
Most highway work zones are restricted in terms of available lateral space and it is desirable to minimize the deflection of work zone barriers in order to minimize the required buffer distance between the barrier and work activity area. A new connection designed to reduce the dynamic deflection of portable concrete traffic barriers was developed through a program of finite element simulation and full-scale crash testing. The new cross-bolted (or X-bolt) connection achieves the objective of low dynamic deflection without sacrificing constructability. The system hasthe lowest deflection of any approved portable concrete barrier. This research received the prestigious K.B. Woods Award, which is given annually by the Transportation Research Board for the best paper in the area of design and construction of transportation facilities.
Reference
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R.P. Bligh, N.M. Sheikh, D.C. Alberson, A.Y. Abu-Odeh. Low-Deflection Portable Concrete Barrier. Transportation Research Record 1984, Journal of the Transportation Research Board, Transportation Research Board, Washington, D.C., 2006.