Experimental Investigation on Ultra High-Strength Concrete under Concentrated Loading

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Title: Experimental Investigation on Ultra High-Strength Concrete under Concentrated Loading

Author(s): K. Holschemacher, F. Dehn, S. Klotz, and D. Weiße

Publication: Special Publication

Volume: 228

Issue:

Appears on pages(s): 1145-1158

Keywords: concentrated loading; helical reinforcement; reactive powder concrete (RPC); transversal tensile stress; ultra high-strength concrete (UHSC)

Date: 6/1/2005

Abstract:
This report presents the results of an experimental program dealing with ultra high strength concrete (UHSC) under concentrated load. The implemented tests should be used for the determination of the bearing capacity under concentrated load and for the observation of the failure behavior. Specimens made of plain and reinforced concrete were tested, whereby a helical reinforcement was used. The results were compared with an extrapolation of existing design rules established for normal and high strength concrete. In this context, two different UHSC and one high strength concrete for comparison were investigated in order to recognize the influence of concrete strength and composition on the load bearing behavior under concentrated load. The results showed that the bearable concentrated load depends on the compressive strength and also on the concrete composition. Furthermore the under-proportional increase of the tensile strength in relation to the compressive strength has an important influence on the bearing behavior of UHSC.