Numerical investigation of the resistance of precast RC pinned beam‐to‐column connections under shear loading

Abstract

Summary In precast technology, the effective design and construction are related to the behaviour of the connections between the structural members in order to cater for all service, environmental and earthquake load conditions. Therefore, the design and detailing of the connections should be undertaken consistently and with awareness of the desired structural response. In the research presented herein, an analytical expression is proposed for the prediction of the resistance of precast pinned connections under shear monotonic and cyclic loading. The proposed formula addresses the case where the failure of the connection occurs with simultaneous flexural failure of the dowel and compression failure of the concrete around the dowel, expected to occur either when (i) adequate concrete cover of the dowels is provided (d > 6 D) or (ii) adequate confining reinforcement (as defined in the article) is foreseen around the dowels in the case of small concrete covers (d < 6 D). The expression is calibrated against available experimental data and numerical results derived from a nonlinear numerical investigation. Emphasis is given to identifying the effect of several parameters on the horizontal shear resistance of the connection such as: the number and diameter of the dowels; the strength of materials (concrete, grout, steel); the concrete cover of the dowels; the thickness of the elastomeric pad; the type of shear loading (monotonic or cyclic); the pre‐existing axial stress in the dowels; and the rotation of the joint. In addition, recommendations for the design of precast pinned beam‐to‐column connections are given, especially when the connections are utilised in earthquake resistant structures. Copyright © 2017 John Wiley & Sons, Ltd.

Strength Effect of Different U-Shaped HDR Thicknesses in Hook-End Precast Beam-Column Joint: A Nonlinear FE Analysis

“…It can be seen that 25 mm thick of U-shaped HDR pad exhibits a 3% to 5% higher maximum strength than specimens of other HDR thickness. The phenomenon of thicker U-shaped HDR rubber in the hook-end beam-column joint has decreasing strength is similar to the parametric study by Kremmyda et al [14]. However, the numerical results do not tally with Kremmyda et al [14] when thinner U-shaped HDR pads were used.…”

“…The phenomenon of thicker U-shaped HDR rubber in the hook-end beam-column joint has decreasing strength is similar to the parametric study by Kremmyda et al [14]. However, the numerical results do not tally with Kremmyda et al [14] when thinner U-shaped HDR pads were used. This is probably due to the hook-end connection not utilizing any dowel bar at the precast beam-column joint to achieve the shear strength.…”

Arundic acid administration protects astrocytes, recovers histological damage and memory deficits induced by neonatal hypoxia ischemia in rats

“…Interestingly, such protective effects persist even in case of delayed treatment (Oki et al, 2008). Arundic acid also decreased extracellular glutamate levels, leading to a decrease in infarct size in a rat model of cerebral ischemia (Pettigrew et al, 2006).…”

Effects of Modelling Assumption on the Evaluation of the Local Seismic Response for Rc Precast Industrial Buildings

“…The connections between the principal beams and the columns are made by steel dowels protruding from the column, inserted into holes in the beams and subsequently grouted. The connections are designed with a shear action resulting from capacity design and a shear strength resulting from the following formulation [39], [40], [41].…”