Prediction of Bond-Slip Behavior of Circular/Squared Concrete-Filled Steel Tubes

Allouzi, Rabab; Almasaeid, Hatem H.; Salman, Donia G.; Abendeh, Raed M.; Ahmad, Hesham S.

doi:10.3390/buildings12040456

Cited by 14 publications

(6 citation statements)

References 39 publications

(48 reference statements)

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“…The slip between the slab and the beam interface contributed to the energy dissipated by the system, and the ductility demands decreased on other parts, such as the beam ends and the joints. Numerical results confirmed the experimental conclusions and revealed that using intermediate and low shear connection degrees with partial-strength joints results in a practical seismic design [11][12][13].…”

Section: Introductionsupporting

confidence: 71%

Seismic Performance of Eccentrical Braced Frame Retrofitted by Box Damper in Vertical Links

et al. 2022

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Passive control methods reduced the vulnerability of structures to earthquakes by decreasing the seismic demand and improving structural plasticity. One of the passive control systems is the eccentrically braced frame with a vertical shear link (V-EBF). The present study aims to direct the damage to the absorbing plates of the vertical link beam to allow the structure’s appropriate seismic performance and reparability. Yielding dampers are one of the most widely used types in systems and can provide perfect vibration control if used optimally. Different types of dampers were introduced and used; how to use them depends on the shape and the way they connect to the structure. This research investigates a new type of damper called box damper, an improved type of shear panel damper. The improvement in the way of connecting to the braced frame and the ease of using this damper in different situations are the features of this new damper. This research investigated the mechanism of these yielding dampers in structures and their strengths and weaknesses. In the next step in this study, a V-EBF with plates of thickness 4, 6, and 8 mm was analysed in the finite element software ABAQUS using the nonlinear static analysis and cyclic loading conditions. Some examples of this damper were attached to the braced frames to investigate the effect of using this damper on the seismic behaviour of the braced structures. The results show that the shear link performs like an electrical fuse absorbing all damage and plastic hinges so that other elements of the braced frame remain in their nonlinear elastic region. By increasing the thickness of the damper from 2 to 8 mm, the resistance increased by two times, and the flexibility of the structure had a noticeable change with the rise in thickness from 2 mm to 8 mm. Ductility increased from 38 to 75 mm.

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Section: Introductionsupporting

confidence: 71%

Seismic Performance of Eccentrical Braced Frame Retrofitted by Box Damper in Vertical Links

et al. 2022

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“…The forecast made by the ANN model will be limited to the actual maximal and minimal values. The data are normalised and denormalised using equations ( 1) and (2), respectively [24]:…”

Section: Muslum [11]mentioning

confidence: 99%

“…Additionally, the connection weight-based importance factor approach, proposed by Olden and Jackson, is used to judge the importance of RN and UPV in the 2-5-1 ANN model. This method calculates the total connection weights of every input as the product of input-hidden and hidden-output connection link weights, existing between every input and output, and then adds the products for all hidden nodes to obtain the importance factor [24]. Table 8 lists the importance factor values of RN and UPV based on the connection links weights listed in Table 4.…”

Section: Civil and Environmental Engineeringmentioning

confidence: 99%

Prediction of Geopolymer Concrete Compressive Strength Utilizing Artificial Neural Network and Nondestructive Testing

Almasaeid

Alkasassbeh

Yasin

2022

Civil and Environmental Engineering

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A promising substitute for regular concrete is geopolymer concrete. Engineering mechanical parameters of geopolymer concrete, including compressive strength, are frequently measured in the laboratory or in-situ via experimental destructive tests, which calls for a significant quantity of raw materials, a longer time to prepare the samples, and expensive machinery. Thus, to evaluate compressive strength, non-destructive testing is preferred. Therefore, the objective of this research is to develop an artificial neural network model based on the results of destructive and non-destructive tests to assess the compressive strength of geopolymer concrete without needing further destructive tests. According to the artificial neural network analysis developed in this study, the compressive strength of geopolymer concrete can be predicted rather accurately by combining the results of the non-destructive with R 2 of 0.9286.

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“…It has been observed through the literature that there are many existing finite element analyses to predict the bending behaviour of steel tubes [ 36 , 37 , 38 , 39 ]. However, there are no available finite element analyses to evaluate and predict the bending behaviour of circular hollow steel tube sections with openings and presence of rings in the length of the tube, which are necessary to investigate steel tube sections under different loadings and can be used to be a reference for future studies and provide input data for the steel tubes in the finite element (FE) models.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and Prediction of the Bending Behavior of Circular Hollow Steel Tube Sections Using Finite Element Analysis

et al. 2022

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Circular hollow steel tube columns are widely used in high-rise buildings and bridges due to their ductility and lower weight compared to reinforced concrete. The use of this type of steel section has several advantages over using reinforced concrete members. The present study investigates the bending behavior of steel circular hollow sections when subjected to bending loads. The variations in material characteristics with regard to position along the cross-section of a steel tube member is first considered in this experimental study, providing for a more accurate definition of the material behavior in the model. A supported beam tested by two-point loads is the loading type that is used to study the bending performance of steel tubes. Ten circular hollow beam specimens were prepared and tested up to and post the failure stage with the following dimensions: thickness (2, 3, and 6 mm), diameter (76.2, 101.6, and 219 mm), and span (1000, 1500, and 2000 mm). A finite element analysis has been conducted for these ten specimens using the ANSYS program. The finite element model is compared to experimentally obtained data to verify that both local and global behaviors are correctly considered. The load-deflection results of this analysis showed a good agreement with the experimental results. A parametric study also was performed that considered two variables, which were the effect of the presence of circular rings and the change of opening location in the length direction on the specimens’ behavior. This study showed that the presence of the circular rings in the specimen led to an increase in its ultimate strength (of 53.24%) compared with the non-presence of these rings. In contrast, the presence of openings at 30, 40, and 50% from the specimen length reduced the strength capacity by 8.76, 14.23, and 17.88%, respectively.

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Prediction of Bond-Slip Behavior of Circular/Squared Concrete-Filled Steel Tubes

Cited by 14 publications

References 39 publications

Seismic Performance of Eccentrical Braced Frame Retrofitted by Box Damper in Vertical Links

Seismic Performance of Eccentrical Braced Frame Retrofitted by Box Damper in Vertical Links

Prediction of Geopolymer Concrete Compressive Strength Utilizing Artificial Neural Network and Nondestructive Testing

Evaluation and Prediction of the Bending Behavior of Circular Hollow Steel Tube Sections Using Finite Element Analysis

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