FLEXURAL BEHAVIOUR OF ULTRA HIGH STRENGTH CONCRETE BEAMS

Abstract

The main objectives of this search addressed through the experimental work described in this chapter. The main objective is to study the flexural behavior of ultra-high strength concrete Beams subjected to concentrated loads. This chapter presents a detailed description of the experimental test program. The program incorporated two phases in which specimens were designed and cast to study the desired properties. The first phase reviews a detailed Tested specimen. The second phase deals with the characteristics of the used material, mix proportions, preparation of specimens and loading system.

In the current research, twelve reinforced UHSC beams were cast and statically tested under the effect of two concentrated loads to failure at the reinforced concrete laboratory of housing and building research center to investigate the modes of failure, the ultimate load carrying capacity and the flexural behavior of UHSC concrete. The deformation, vertical deflection, concrete strain, compression steel strain and longitudinal steel strain was measured. The observed parameters and the description of the specimens and reinforcement in current work will be discussed later.

7.2 Objective of the Experimental Program

Strength Concrete (UHSC) Beams. The various specific objectives are: 1. Studying the flexural behavior of UHSC beams. 2. Investigate to optimum minimum reinforcement ratio with minimum crack width UHSC beams. 3. The tension stiffening behavior for UHSC beam. 4. Recommendations for ECP for UHSC.