Behavior of high-strength concrete interior slab-column connections with openings under seismic loading

摘要

Nine full-scale reinforced High-Strength Concrete (HSC) and Normal-Strength Concrete (NSC) interior slab-column connections with openings have been tested under seismic loading. The applicability of the punching shear design provisions of ACI 318-2014 building code, the Egyptian code (ECP 203-2017) and the code of the Japan Society of Civil Engineering (JSCE-2007) when applied to HSC interior slab-column connections have been examined. The main studied parameters is the concrete strength (NSC with f(c) = 25 MPa and HSC with f(c) = 75 MPa) and the openings location and size. A numerical model for predicting the seismic behavior of interior slab-column connections has been proposed using three dimensional finite element computer program. The results show that the punching shear strength calculated using the equations of the ACI 318-2014 are conservative for NSC and HSC specimens, while for ECP 203-2017 the calculated values are conservative for NSC specimens and just safe for HSC specimens. (C) 2019 Published by Elsevier Ltd.