Abstract
The article presents the results of a numerical experiment consisting in a test of an eccentrically compressed reinforced concrete column and comparison of the results obtained with the results of experimental studies. With the development of numerical methods and software packages, methods (techniques) of modeling structural elements using more detailed calculation models with solid finite elements that allow direct consideration of the joint behavior of concrete and reinforcing bars become relevant. The use of such methods requires verification of individual load-bearing structural elements, such as columns, beams, slabs. The article refers to a nonlinear concrete model – Continuous Surface Cap Model (CSCM). This model is implemented in the LS-DYNA software package and enables to consider the joint behavior of reinforcing bars and concrete, using bar (for reinforcing bars) and solid (for concrete) finite elements. An eccentrically compressed reinforced concrete column of square section with dimensions of 150х150х1150 (h) mm is chosen as an object of modeling. The studies have shown that the ultimate breaking load on the column based on the results of numerical modeling is consistent with the experimental values (discrepancy does not exceed 3.4%). The pattern of development of cracks and fractures, obtained from the results of modeling in the LS-DYNA software package corresponds to the pattern of fractures obtained as a result of experimental studies. According to comparison of the results obtained, it can be argued that a numerical test showed good agreement with the results obtained during full-scale experiments.
Highlights
As already mentioned earlier in [1], simplified bar and shell finite elements are generally used in the Russian Federation for simulation of loading diagrams of buildings and structures
The model was divided into finite elements (FE) of two types: longitudinal and transverse reinforcing bars were broken into bar FE; concrete and steel plate were broken into solid FE in the form of a parallelepiped
The ultimate load on the reinforced concrete column based on the modeling results in the LS-DYNA software package is quite similar to the results of the experimental study (3.4% discrepancy)
Summary
As already mentioned earlier in [1], simplified bar and shell finite elements are generally used in the Russian Federation for simulation of loading diagrams of buildings and structures. This approach is quite acceptable for calculation of static loads. This requires an adequate choice of load-strain diagrams or models of materials. Let us consider the study of the reinforced concrete column
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