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Shear Strength of Fiber Reinforced Reactive Powder Concrete I-Shaped Beam without Stirrup

By L-Z. Jin, X. Chen, F. Fu, X-F. Deng and K. Qian

Abstract

Due to the high compressive strength of steel fiber reinforced (SFR) and Reactive Powder concrete (RPC), higher degree of prestressing is available for the beams using fiber reinforced reactive powder concrete. Hence, a slenderer structural component can be designed, which could save self-weight, work spacing, and potential reducing the costs. However, comparing to conventional reinforced concrete (RC) beams, studies on post-tensioning SFR-RPC beams subjected to shear failure are fewer. In this study, a series of shear tests for four large-scale beams (one SFR-RPC beam and three post-tensioning SFR-RPC beams) are made to quantify the effects of levels of prestressing on shear load capacity of SFR-RPC beams. Finally, the test results together with data published from existing literatures are compared to the design strength calculated in accordance to different standards. It is found that the current code provisions will underestimate the shear load capacity significantly. In addition, an analytical model is proposed to predict the shear load capacity of the test specimens. A good correlation is observed with a mean analytical model to experimental strength ratio of 1.02 and coefficient of variation of 0.12

Topics: TA
Publisher: 'Thomas Telford Ltd.'
Year: 2019
DOI identifier: 10.1680/jmacr.18.00525
OAI identifier: oai:openaccess.city.ac.uk:22281
Provided by: City Research Online

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