Authors
Abstract
This work studles punching shear resistance of slabs with normal strength concrete (NSC) and high strength concrete (HSC), with emphasis on HSC. Test results of (47) reinforced concrete slabs, including (17) in NSC and (30) slabs in HSC available from existing research are studied in this paper. These (47) tests, covered a very wide range of concrete compressive strength (fc'), (fc' ranged between 14.4 MPa and 119.0 MPa), and all test specimens failed in punching shear.
Similar to other codes, the ACI code limits the usefulness of concrete strength contribution to having fc ≤ 25/3 MPa. This limits the usefulness of fe' to 69 MPa. The present development of concrete technology makes it possible to produce HSC with fe' much greater than this value.The present work attempts to bridge this gap. It is shown that the proposed equations in shear resistance give results that have good agreement with tests.
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