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Static tests
Static tests on barrier posts
The static test takes into account the provisions of prEN1317-5 and UNI/TR 11785.
We compare the forces acting on the pole in the same crash configuration performed both on the ground of the test field – of known and homogeneous characteristics – and in the installation site, at the occurrence of a certain horizontal displacement. According to the calculated moment, the characteristics of the ground can be defined. Since the thrust velocity imposed on the post is low and the contributions given to the resistance by the inertia, the viscosity of the soil and the stain-rate effect of the steel are not taken into account, the static tests are able to evaluate only the resistance of the soil.
As indicated in the standard UNI/TR 11785:2020 “Technical support document for the preparation of the manual of use and installation of road restraint devices on embankment” for a correct assessment of the functionality of the barriers in place the best way to proceed is the characterization of the system “post/soil” through the execution of dynamic tests.