Abstract
Abstract This paper describes the parametric analysis applied to assess the influence of column anchorage-reinforcement length on concrete two-pile caps under uniform compression. The non-linear numerical analysis was conducted with the bi-dimensional elements of ATENA 2D software, considering perfect adherence between steel and concrete. Simulation was based on the experimental reference model by Munhoz [1], which was the parameter adopted to validate the numerical modeling. From the validated model, four different anchorage reinforcement lengths were adopted, 34,0 cm, 20,0 cm, 10,0 cm e 3,0 cm, in order to compare pile caps behavior after these changes. Pile cap simulations presented similar behavior, i.e., column anchorage reinforcement length is not a preponderant factor for the internal mechanisms that regulate the function of these elements.
Highlights
The theory by Blévot & Frémy [2] is the most accepted and widespread one to describe pile cap behavior, since their study became a reference for other researchers and codes
This paper describes the parametric analysis applied to assess the influence of column anchorage-reinforcement length on concrete two-pile caps under uniform compression
The main aim of this study was to assess the influence of column reinforcement anchorage length on pile caps with two piles
Summary
The theory by Blévot & Frémy [2] is the most accepted and widespread one to describe pile cap behavior, since their study became a reference for other researchers and codes. According to the aforementioned authors, most tested models failed due to struts concrete crushes after cracks emerged parallel to the compressive stress flows. The tensile stress actions, perpendicular to the struts caused these cracks Such process is known as splitting effect. Tests were performed with models in different reinforcement distributions and found that they failed due to struts concrete crushes (splitting effect), corroborating with Blévot & Frémy [2] results. Buttignol [4] performed numerical analysis based on Delalibera [5] and Miguel’s [6] experimental tests and observed, as aforementioned authors, the splitting effect and compressive struts formation. Compares will be performed between experimental and numerical pile caps with two piles, in order to validate the numerical simulation conducted in ATENA 2D software, in which experimental results come from results by Munhoz1s [1] research
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