Impact of Column Rectangularity on Punching Shear Strength: Code Predictions versus Finite Element Analysis

Finite element analysis of punching shear behavior of reinforced concrete slabs supported on walls

“…The V Study is an extension of the rectangular column study previously conducted by the authors. 10,11 The majority of trends discussed in this section were found to be consistent with those observed in the rectangular column study. This similarity suggests that the behavior of slab-rectangular column connections and slab-wall connections are related.…”

“…The use of isolated specimens also provides the additional benefits of reducing the required computational resources (analysis of full flat plate systems with solid three-dimensional elements is still currently infeasible due to the time required to complete even one analysis run) and allowing the results of this study to be compared with those from the previous rectangular column study. 10,11 Since no isolated slab-wall specimens exist in the current experimental database, the radius of contraflexure around a slab-wall connection had to be estimated as discussed in Milligan and Polak 18 and summarized herein. Since the FEM used in this study was originally calibrated for interior slab-column connections, the interior slab-wall connection shown in Figure 4a was considered.…”

“…Much of this previous research involved experimental testing and was primarily focused on slabs supported on square 5,6 or circular columns 7 even though slabs supported on rectangular columns or walls are common. Much less research effort has been dedicated to slabs supported on rectangular columns [8][9][10][11][12][13][14][15] or walls. [1][2][3][16][17][18][19] Punching shear experiments typically involve isolated slab-column connections, where the portion of the slab included in the specimen approximates the negative moment region around the connection.…”

One-way shear and punching strength of reinforced concrete slabs without transverse reinforcement under concentrated loads

“…The parameters used for NC were chosen based on the literature review (GENIKOMSOU; POLAK, 2015POLAK, , 2016POLAK, , 2017aZURELL, 2020ZURELL, , 2021NANA et al, 2017). The dilation angle adopted for the concrete was 30º.…”

“…Several studies investigated numerical modeling approaches to predict the punching shear behavior of slab-column connections made entirely with NSC (NSC flat slabs) with and without shear reinforcement (BALOMENOS; GENIKOMSOU; POLAK, 2018;POLAK, 2015POLAK, , 2016POLAK, , 2017aPOLAK, , 2017bZURELL, 2020ZURELL, , 2021NAVARRO;IVORRA;VARONA, 2018VARONA, , 2020. In these, the NLFEA aided understanding and evaluating the effect of parameters such as openings close to the column on the structural response of flat slabs POLAK, 2017a;MARQUES et al, 2020) and the compressive membrane action effect (GENIKOMSOU; POLAK, 2017b).…”