Fracture Modeling of Concrete in Plain and Reinforced Concrete Members

Allouzi, Rabab; Alkloub, Amer; Naghawi, Hana; Al-Ajarmeh, Ramia

doi:10.1007/s40999-018-0353-5

Cited by 10 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Besides, the yield criteria and the flow rule, which are essential elements of the classical plasticity theory, are effectively considered in this model. It was also found by Allouzi et al (2019) and Allouzi and Irfanoglu (2018) that this model is able to simulate shear in different structural members.…”

Section: Numerical Modellingmentioning

confidence: 62%

Punching shear behaviour of flat slabs with different reinforcement schemes: openings and rectangularity effects

Salman¹,

Allouzi

Shatarat

2021

IJSI

Self Cite

View full text Add to dashboard Cite

PurposeThe main goal is to investigate the effect of size and location of opening and column size on the punching shear strength. Openings are often needed in order to install mechanical and electrical services. This process takes away part of the concrete volume which is responsible for resisting the shear forces and any unbalanced moment. Furthermore, the application of rectangular columns in flat slabs is commonly used in practice as they provide lateral stiffness to the building. They are also utilised in garages and multi-storey buildings where these elongated cross-sectional columns reduce the effective span length between adjacent columns.Design/methodology/approachThis research is a numerical-based investigation that is calibrated based on a thirteen previously tested and numerically calibrated slab specimens with no openings. A parametric study is conducted in this study to consider the effect of other parameters, which are the size and location of opening and the rectangularity ratio of column in order to evaluate their effect on the punching shear capacity. A total of 156 models are developed to study these factors. Additionally, the predicted shear carrying capacity of the simulated slabs is calculated using the ACI318–19 and Eurocode (EC2-04) equation.FindingsThe presence of openings reduced the punching shear capacity. The small opening's location and orientation have almost no effect except for one slab. For slabs of large openings, the presence of openings reduced the punching capacity. The punching capacity is higher when the openings are farther from the column. The numerically obtained results of slabs with rectangular columns show lower punching capacity compared to slabs of squared columns with the same length of the punching shear control perimeter. The punching capacity for all slabs is predicted by ACI318–19 and Eurocode (EC2-04) and it is found that Eurocode (EC2-04) provided a closer estimation.Originality/valueThe slabs considered for calibration were reinforced with four different punching shear reinforcement configurations, namely; ordinary closed rectangular stirrups, rectangular spiral stirrups, advanced rectangular spiral stirrups and circular spiral. Generally, there has been limited research on concrete flat slabs with openings in comparison with other subjects related to structural engineering (Guan, 2009) and no research on punching shear with openings of slabs reinforced with these reinforcement schemes. The available research focussed on the effects of openings on the flexural behaviour of reinforced concrete slabs includes Casadei et al. (2003), Banu et al. (2012) and Elsayed et al. (2009). In addition, experimental tests that examined slabs supported on rectangular columns are very limited.

show abstract

Section: Numerical Modellingmentioning

confidence: 62%

Punching shear behaviour of flat slabs with different reinforcement schemes: openings and rectangularity effects

Salman¹,

Allouzi

Shatarat

2021

IJSI

Self Cite

View full text Add to dashboard Cite

show abstract

“…This model was proposed byLubliner et al (1989) for monotonic response and then it was refined byLee and Fenves (1998) to take into account the dynamic and cyclic behavior. It was also found byAllouzi et al (2019) andAllouzi and Irfanoglu (2018) that this model is able to simulate shear in different structural members.…”

mentioning

confidence: 64%

“…Many tensile stress-strain relationships and stress-displacement relationships of concrete were studied by many researchers to simulate the plastic branch of concrete in tension. Based on the research conducted by Allouzi et al (2019), different relationships to model concrete in tension was compared and it was found that stress-displacement response defined by Cornelissen et al (1986) can simulate tensile behavior of the concrete as shown in Figure 2b.…”

Section: Short Rc Columns Undermentioning

confidence: 99%

Finite element modeling of reinforced concrete short columns subjected to shear in two perpendicular directions

Alraqad

Allouzi

Alkloub

2022

MMMS

Self Cite

View full text Add to dashboard Cite

PurposeShort columns can cause serious damage when subjected to an earthquake due to their high stiffness with low ductility. These columns can be exposed to multidirectional shear forces, which encouraged this study to investigate the behavior of structural short columns under bi-directional shear.Design/methodology/approachFinite element analysis (FEA) using ABAQUS is conducted and calibrated based on experimental data tested by previous researchers who studied the uni-directional behavior of short columns subjected to cyclic shear displacements. Then, the calibrated column models are further investigated to study the influence of bidirectional cyclic shear. Two scenarios are investigated, namely “simultaneous” and “sequential,” to compare the performance in terms of shear strength reduction.FindingsThe results show that the shear strength reduction significantly appears when 1:1 simultaneous bi-directional cyclic shear is applied. However, the shear reduction is more significant when the sequential scenario is applied. The seismic forces or deformations applied in orthogonal directions should be combined to achieve the maximum seismic response of structures as specified in Federal Emergency Management Agency (FEMA) 356 Standard. Finally, the combinations presented in literature to consider bi-directional shear are investigated. Based on FE results, the effect of applied 1:0.30 bi-directional cyclic shear simultaneously does not result in significant effect on the considered columns properly design for seismic forces.Originality/valueTo investigate the effect of multidirectional shear forces on the shear strength capacity of short columns, the presented effect of multidirectional shear forces in literature to consider bi-directional shear are investigated.

show abstract

“…Steel was defined as a plastic material, while the plasticity of concrete was defined using the Concrete Damage Plasticity (CDP) model with plasticity parameters defined according to ABAQUS user guide manual [32] . The compressive and tensile stress-strain behaviors of concrete were obtained according to Tsai's equations [33] and are illustrated in Figure 6.…”

Section: Methodsmentioning

confidence: 99%

Behavior of light-gauge steel short columns filled with normal and lightweight aggregate concrete under concentric axial loading

AL-Zubaidi¹,

Abdel-Jaber²,

Hunaiti³

et al. 2022

J Appl Eng Science

View full text Add to dashboard Cite

This study aims to investigate experimentally and numerically the behavior of light-gauge steel tubes filled with normal and lightweight concrete under axial loading. A total of thirty-five specimens, including thirty-two composite columns, two bare steel columns, and one normal-weight plain concrete column, were considered. The main variables in the tests were the concrete infill type (normal-weight and lightweight), the column’s length (1, 1.25, 1.5, 1.75-m), the steel tube thickness (2 and 2.4-mm), and the cross-section (100×100 and 150×150-mm). In addition, theoretical capacities were computed according to Eurocode 4, and a finite element analysis was conducted using ABAQUS software. The results showed that the behavior of lightweight filled steel tubes was similar to the normal weight filled tubes during the test; however, their capacities were lower compared to the normal weight filled tubes by a range of (1%-20%). Yet, lightweight filled steel tubes can achieve high axial loads. In addition, the axial capacity of all composite columns decreased with the increase of the column’s height and increased with the increase of both the cross-section and the steel thickness. Current code specifications of EC4 and the numerical results obtained from ABAQUS overestimated the capacities of the composite concrete-filled tubes by 3% and 14%, respectively; however, the EC4 was found to present close estimations to the experimental results.

show abstract

Fracture Modeling of Concrete in Plain and Reinforced Concrete Members

Cited by 10 publications

References 6 publications

Punching shear behaviour of flat slabs with different reinforcement schemes: openings and rectangularity effects

Punching shear behaviour of flat slabs with different reinforcement schemes: openings and rectangularity effects

Finite element modeling of reinforced concrete short columns subjected to shear in two perpendicular directions

Behavior of light-gauge steel short columns filled with normal and lightweight aggregate concrete under concentric axial loading

Contact Info

Product

Resources

About