Shear resistance of masonry panel in infilled RC frames

Dautaj, Arton; Muriqi, Ali; Krasniqi, Cene; Shatri, Burbuqe

doi:10.1007/s40091-019-0223-7

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…They noticed that after adding masonry infill walls to the frame, the lateral strength, rigidity, and energy dissipation capacity of the exposed reinforced concrete frame were significantly improved, while the displacement ductility ratio was significantly reduced in the laboratory of the University of Bucharest, the seismic response of a reinforced concrete frame with masonry infill slabs was verified by Bolea (2016) [30]. Dautaj et al (2019) [31] noticed that if separation joints are not provided between the walls and the frames filled with masonry, under seismic excitations, these walls could contribute to the mechanism of resistance to loads and to the fracture pattern of the frames in reinforced concrete constructions. Made the condition that if separation joints are not provided between the walls and the filled frames, under seismic excitations, these walls could contribute to the load resistance mechanism and the failure pattern of reinforced concrete frames.…”

Section: Introductionmentioning

confidence: 95%

Effect of Masonry Infill Panels on the Seismic Response of Reinforced Concrete Frame Structures

2021

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The present work concerns the numerical investigation of reinforced concrete frame buildings containing masonry infill panel under seismic loading that are widely used even in high seismicity areas. In seismic zones, these frames with masonry infill panels are generally considered as higher earthquake risk buildings. As a result there is a growing need to evaluate their level of seismic performance. The numerical modelling of infilled frames structures is a complex task, as they exhibit highly nonlinear inelastic behaviour, due to the interaction of the masonry infill panel and the surrounding frame. The available modelling approaches for masonry infill can be grouped into two principal types; Micro models and Macro models. A two dimensional model of the structure is used to carry out non-linear static analysis. Beams and columns are modelled as non-linear with lumped plasticity where the hinges are concentrated at both ends of the beams and the columns. This study is based on structures with design and detailing characteristics typical of Algerian construction model. In this regard, a non-linear pushover analysis has been conducted on three considered structures, of two, four and eight stories. Each structure is analysed as a bare frame and with two different infill configurations (totally infilled, and partially infilled). The main results that can be obtained from a pushover analysis are the capacity curves and the distribution of plastic hinges in structures. The addition of infill walls results in an increase in both the rigidity and strength of the structures. The results indicate that the presence of non-structural masonry infills can significantly modify the seismic response of reinforced concrete "frames". The initial rigidity and strength of the fully filled frame are considerably improved and the patterns of the hinges are influenced by structural elements type depending on the dynamic characteristics of the structures. Doi: 10.28991/cej-2021-03091764 Full Text: PDF

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Section: Introductionmentioning

confidence: 95%

Effect of Masonry Infill Panels on the Seismic Response of Reinforced Concrete Frame Structures

2021

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“…Diagonal shear strength is determined by the strength of the head joint and the bad joint supports the force. Diagonal shear strength is determined by the binding ability of the head joint and bad joint in the wall (Dautaj et al, 2019;El-dakhakhni, 2017;Lee et al, 2021;Tomaževič, 2009). The stronger the bond between the head joint and bad joint, it can be assumed that the higher the diagonal shear stress.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Tests of the Area of Head Joints and Bed Joints Increase the Diagonal Shear Stress of Brick Walls

Marwahyudi,

Rifai,

Ahwan

2024

Astonjadro

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The strength of a brick wall is influenced by the failure of the mortar bond and the resistance of the bad joint and head joint when carrying the force. The wider the head joint and bad joint areas result in a wider bonded area which increases the diagonal shear strength of the wall. Residential walls that have increased ability to withstand diagonal shear forces will be more stable when subjected to earthquake lateral forces. This research formulates that the wider the connecting area of the body and head joint, the higher the diagonal shear strength. The test was carried out by making a square test object measuring 60 x 60 cm. then pressure is applied in the diagonal direction. At the time of setting up the test object is done carefully and thoroughly. The test object is positioned perpendicular to the diagonal direction. The test object is placed absolutely perpendicular and is given a load until it is completely damaged. Loading method by providing a force that increases regularly until the structure experiences a complete failure. The bonded area in each brick shape is measured and compared with the results of the diagonal shear strength. This value is analyzed to obtain the effect on the diagonal shear strength. The percentage effect of each brick shape is compared and the results are analyzed. The results of the analysis are to obtain justification whether the area of the bad joint and head joint affects the diagonal shear strength. The novelty of this research is to obtain several brick designs that increase the strength of the diagonal shear stress. Tests show that the greater the area of the head joint, the greater the value of the diagonal shear stress.

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“…In fact, the seismic behavior of RC frames with masonry infills has been intensively studied by many researchers, including the present authors. Several of them have performed structural testing on the RC frames with masonry infills using the in-plane static lateral load [2][3][4][5][6][7][8][9][10][11][12][13][14]. Meanwhile, Hashemi and Mosalam [15], Lourenco et al [16], and Climent et al [17] conducted experimental studies using shaking table equipment.…”

Section: Introductionmentioning

confidence: 99%

A Simple Strengthening Method for Preventing Collapsed of Vulnerable Masonry Infills

et al. 2022

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A series of structural tests were conducted to examine the seismic performance of masonry infills strengthened with particular materials on infilled reinforced concrete (RC) frame structures. Six 1:4 scaled-down RC frame specimens had been prepared, including one brick-infilled frame without strengthening and five brick infills strengthened with innovative strengthening materials. The materials were steel wire mesh, chicken hexagonal wire mesh, plastic wire mesh, fiber-reinforced polymer (FRP), and plastic stretch film. The strengthening was diagonally applied on both surfaces of the masonry infill. The steel wire mesh, chicken hexagonal wire mesh, and plastic wire mesh were sewn using steel wire, while the FRP sheet was glued using epoxy resin and the plastic stretch film was glued using synthetic rubber adhesive. The specimens were tested following the FEMA 461 standard testing protocol, which involved applying lateral static cyclic loading to the specimens. The displacement transducer apparatus measured the deformations of the specimens, and crack propagation was observed during experimental works. The experimental results showed that most specimens exhibited an increase in their lateral strength, secant stiffness, deformation capacity, and energy dissipation. Among all prepared specimens, the specimen using plastic stretch film showed the best and most promising results, i.e., long deformation and steady lateral strength after yielding. This result suggests that using plastic stretch for strengthening can increase ductility performance. It is expected to withstand earthquake shaking, has low application costs, and is feasible for application even by unskilled local laborers.

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Shear resistance of masonry panel in infilled RC frames

Cited by 6 publications

References 13 publications

Effect of Masonry Infill Panels on the Seismic Response of Reinforced Concrete Frame Structures

Effect of Masonry Infill Panels on the Seismic Response of Reinforced Concrete Frame Structures

Laboratory Tests of the Area of Head Joints and Bed Joints Increase the Diagonal Shear Stress of Brick Walls

A Simple Strengthening Method for Preventing Collapsed of Vulnerable Masonry Infills

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