Author(s)

J.P. Ulfkjaer, L.P. Hansen, S. Qvist & S.H. Madsen

Abstract

A simple experimental investigation is performed to measure how different fracture parameters of concrete are dependent on the displacement rate. One of the simplest structural geometries plain concrete beams with a notch in the midsection subjected to three point bending is used as test specimen. The beams are tested in a closed loop servo controlled materials testing system. The experimental results for these preliminary tests show that the bending tensile strength is increasing with the displacement rate and that the fracture energy is constant at lower displacement rates and then increasing at higher displacement rates. Further tests will be carried out. 1. Introduction During the last two decades designers and inve

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