Numerical Modeling of Reinforced Concrete Beams, Including the Real Position of Reinforcing Bars

Abstract

A b s t r a c tThe article presents comparison of the results obtained from reinforced concrete beams experimental studies with the use of ARAMIS system (digital image correlation) with the results gained from numerical modeling. During studies, deviation from the plane of reinforced concrete beams was observed. Inventory of rebars positions in cross-section of this beams showed significant deviations. Analysis carried out in the work [1] revealed the impact of improperly embedded longitudinal reinforcement on the occurrence of horizontal displacements. Based on the collected data, numerical models of two selected reinforced concrete beams with correct and incorrect positon of the reinforcing bars were made using the Concrete Damaged Plasticity model in Abaqus software. It has been shown that premature interruption of the calculation appeared in models taking into account deviations in the position of reinforcing bars. However, the occurrence of horizontal displacements was still confirmed by numerical model for beams with incorrect positioning of rebars. S t r e s z c z e n i e W artykule przedstawiono porównanie wyników badań eksperymentalnych belek żelbetowych z wykorzystaniem systemu ARAMIS (korelacja obrazu cyfrowego) z wynikami uzyskanymi w wyniku modelowania numerycznego. W wykonanych badaniach zaobserwowane zostało odchylenie z płaszczyzny belek żelbetowych, spowodowane niezgodnym z projektem rozmieszczeniem prętów zbrojenia, co potwierdzono w pracy [1]. Inwentaryzacja położenia prętów zbrojeniowych w przekroju poprzecznym belek wykazała ich znaczne odchylenia. Na podstawie zebranych danych, w oprogramowaniu Abaqus, przy użyciu modelu Concrete Damaged Plasticity, wykonano numeryczne modele dwóch wybranych belek żelbetowych z prawidłowym oraz nieprawidłowym rozmieszczeniem prętów. Stwierdzono przedwczesne przerwanie obliczeń dla modeli uwzględniających odchylenie w położeniu prętów zbrojeniowych. Mimo to opracowany model numeryczny potwierdza występowanie przemieszczeń poziomych w belkach z niewłaściwym rozmieszczeniem prętów.

Analysis of the Shear Resistance in the Indented Interface Between Two Concrete Parts of Concrete Composite Beam

“…A detailed description of the operation principle of DIC method, preparation and execution of tests and inaccuracies of the method can be found in publications [1,6,7,[12][13][14].…”

Composite beams with indented construction joint – comparison of results of laboratory tests and numerical analysis

“…A detailed description of the principle of DIC method, preparation and performance of tests and inaccuracies of the method can be found in publications [2], [6], [9], [10].…”

“…The authors [4], [5] created a virtual model of steel-concrete composite beam, calibrated it and found out that such a scientific approach allows reflecting phenomena in this type of connection. In the paper [6], the authors proposed verification of a FEM 3D model of a reinforced concrete beam with test results carried out using the ARAMIS system. They obtained vertical deflection and cracks pattern similar to experimental results.…”

Numerical assessment of reinforced concrete members incorporating recycled rubber materials

“…To assess the appropriate value of ψ, a sensitivity study was carried out with the dilation angle varying in the range of ψ =10°-50°. Typical values of ψ are 25°-54°, depending on the type of concrete and stress states within the member [22][23][24][26][27][40][41]. It can be noted from Figure (3b) that with the high value of ψ=50 ο , the model showed a stiffer response compared to those with lower dilation angles and the test results.…”

“…Although various studies were carried out on the numerical modelling of conventional or hybrid RC members (e.g. [22][23][24][25][26][27]), such investigations on the behaviour of RuC elements have been limited, particularly for cases with relatively high rubber content. For example, numerical simulations of RuC samples with up to 20% rubber investigated the compressive and flexural tensile strength of the material [28].…”