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Article
A Proposed Equation for the Evaluation of the Nominal Ultimate Bending Moment Capacity of Rectangular Singly Reinforced RPC Sections
معادلة مقترحة لاحتساب سعة العزم القصوى لمقطع مستطيل من خرسانة المساحيق الفعالة مفرد التسليح

Authors: Suaad Kh. Ibraheem --- Hisham M. Al Hassani
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2011 Volume: 29 Issue: 5 Pages: 925-934
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Based on compressive stress – compressive strain curves of Reactive PowderConcrete (RPC) which have been established recently in a Ph.D thesis(1), anequivalent bi-linear compressive stress block for RPC sections under purebending moment is proposed and used to derive an equation for calculating thenominal ultimate bending moment capacity (Mn) of rectangular singly reinforcedRPC sections. The accuracy of the derived equation of Mn is examined bycomparison with the results of existing experimental tests.


Article
Nonlinear Finite Element Analysis of RPC Beams Failing in Shear

Authors: Kaiss F. Sarsam --- Ihsan A.S. Al-Shaarbaf --- Maha M. S. Ridha
Journal: Engineering and Technology Journal مجلة الهندسة والتكنولوجيا ISSN: 16816900 24120758 Year: 2011 Volume: 29 Issue: 11 Pages: 2175-2188
Publisher: University of Technology الجامعة التكنولوجية

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Abstract

Reactive powder concrete (RPC) is a new type of ultra-high strength and high ductility concrete first developed in the 1990's in France. It is recognized as a revolutionary material that provides a combination of ductility, durability, and high strength. In this research work the nonlinear f ini t e element investigation on the behavior of RPCbeams is presented. This investigation is carried out in order to get a better understanding of their behavior throughout the entire loading history. Also, a numerical parametric study was carried out on the RPC beams to investigate the influence of fibrous concrete compressive strength ( ) cf f ¢ , tensile reinforcement ratio ( ) w r , fiber content ( Vf ) and shear span to effective depth ratio (a/d) on the shear behavior and ultimate load capacity of these beams.The three- dimensional 20-node brick elements are used to model the concrete, while the reinforcing bars are modeled as axial members embedded within the concrete brick elements. The compressive behavior of concrete is simulated by an elastic-plastic work-hardening model followed by a perfectly plastic response, which terminated at the onset of crushing. In tension, a fixed smeared crack model has beenused.

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