Multi-strut macro-model for masonry infilled frames with openings

Yekrangnia, Mohammad

doi:10.1016/j.jobe.2020.101683

Cited by 30 publications

(23 citation statements)

References 33 publications

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“…The overall procedure is presented in the flowchart in Figure 2. Consequently, the width of the compression strut W was determined by the minimum frame-infill contact length between both ends of the strut, as shown in Equation (8).…”

Section: Fig 2 Flow Chart To Determine Contact Height (Hs)mentioning

confidence: 99%

“…Analytical studies for evaluation of full-wall lateral strength of frame structures have been done [6,7]. Meanwhile, an analytical model for the evaluation of the lateral strength of walls with openings was developed using the diagonal strut method [2,8]. In this model, it is stated that the frame structure with brick walls with openings has an effect on the lateral strength, the value of the lateral strength depends on the ratio of the area and location of the opening to the wall area.…”

Section: Introductionmentioning

confidence: 99%

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Analytical study on effect of central opening of masonry infill to the lateral strength of RC Frame structure

et al. 2022

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In order to get accuration analytical model for describing the lateral strength of brick masonry with openings, a newly simple method was introduced. Comparison of reinforced concrete frame structures with openings and the experimental results of brick masonry with openings (holes) of 25% and 40% was used in this analytical model. In the high-risk seismic areas many reinforced concrete buildings with infill frame with openings. Where the presence of openings will reduce the strength of the wall. In addition, the influence of the area and location openings in the walls are strongly needed to obtain a more realistic method for designing reinforced concrete structures.The brick mansory was assumed as the non-structural component. However, based on the observations after the earthquake, the presence of brick masonry has a significant contribution to the seismic capacity of reinforced concrete structures. The diagonal strut method was used, where the elastic and plastic behavior of the fill-portal by considering the limited ductility of the infill frame material. The comparison of the new analytical model and the experimental brick masonry with opening 25% and brick masonry with opening 40% shows a good agreement. Finally, it can be said that the new analytical model can be used.

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Section: Fig 2 Flow Chart To Determine Contact Height (Hs)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical study on effect of central opening of masonry infill to the lateral strength of RC Frame structure

et al. 2022

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“…Ref. [25][26][27][28][29][30][31][32][33] The results showed that the infill wall with openings would still improve the seismic performance of the frame structure, but the openings would weaken the stiffness, energy dissipation and bearing capacity of the infill wall to a certain extent. Through the experimental research and finite element analysis of masonry infilled frame structure with openings, Penava et al [32,33] investigated the influence of differences in size and location of window and door openings on the shear resistance of infilled frame and deemed that infill walls have a positive impact on the mechanical properties of the frame.…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Types of Infill Walls on the Hysteretic Performance of Reinforced Concrete Frames

et al. 2021

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To study the influence of masonry infill walls on the hysteretic performance of reinforced concrete frames, a cyclic experiment was conducted for three two-story and two-span reinforced concrete frame structures, including one reinforced concrete frame without infill walls and two frames with infill walls. Whether the infill walls were constructed in the frames and the type of infilled material were the main parameters of the test. The major results reveal that: the infill walls clearly changed the mechanical mechanism of the frame structure at the early stage of loading, magnified the stiffness and horizontal bearing capacity of the frame structure, and enhanced the energy dissipation capacity of the frame structure, but reduced the deformation performance of the frame structure. In the later stage of loading, the infill walls would no longer work as one with the frame gradually with the failure of the infill walls, and the above performance of the structure would approach the empty frame structure. Moreover, the initial stiffness, energy dissipation capacity, and horizontal bearing capacity of the frame with infill walls of clay hollow bricks were the highest among the three specimens. But due to the strong diagonal bracing effect, the damage to the top of the columns and beam-column joints was serious, the yield displacement was reduced significantly, and the shear failure of the top of the columns and the joints occurred prematurely, which showed poor performance of deformation and ductility. However, the frame with infill walls of relatively soft aerated lightweight concrete blocks showed better performance of deformation and ductility.

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“…Furthermore, the openings like windows and doors are usually designed in infills for architectural functions, and it has been demonstrated that the openings could reduce the lateral stiffness and strength of infilled frames (Asteris 2003;Kakaletsis and Karayannis 2008;Morandi et al 2018). The correlation factors, which were defined as a relationship between the opening and infill area, were adopted to consider the reductions in the initial stiffness (strut width) (e.g., Asteris et al 2016;Lemonis et al 2019;Tasnimi and Mohebkhah 2011)) and lateral strength (e.g., Furtado et al 2018a;Yekrangnia and Asteris 2020)) of masonry infills, and these factors can be obtained from the statistical regression analyses of experimental test results (Humayun Basha et al 2020;Mohammadi and Nikfar 2013). However, only the central openings were investigated in the above-mentioned studies (Asteris et al 2016;Furtado et al 2018a;Humayun Basha et al 2020;Lemonis et al 2019;Mohammadi and Nikfar 2013;Tasnimi and Mohebkhah 2011;Yekrangnia and Asteris 2020).…”

Section: Introductionmentioning

confidence: 99%

“…The correlation factors, which were defined as a relationship between the opening and infill area, were adopted to consider the reductions in the initial stiffness (strut width) (e.g., Asteris et al 2016;Lemonis et al 2019;Tasnimi and Mohebkhah 2011)) and lateral strength (e.g., Furtado et al 2018a;Yekrangnia and Asteris 2020)) of masonry infills, and these factors can be obtained from the statistical regression analyses of experimental test results (Humayun Basha et al 2020;Mohammadi and Nikfar 2013). However, only the central openings were investigated in the above-mentioned studies (Asteris et al 2016;Furtado et al 2018a;Humayun Basha et al 2020;Lemonis et al 2019;Mohammadi and Nikfar 2013;Tasnimi and Mohebkhah 2011;Yekrangnia and Asteris 2020). Chen and Liu (2015) performed a parametric study to investigate the influences of opening size and location on the in-plane behaviour of infilled steel frames, and the numerical results showed that the degree of the reduction on the lateral stiffness and strength of infill walls was related to the opening size as well as the opening location.…”

Section: Introductionmentioning

confidence: 99%

Force–displacement relationship modelling of masonry infill walls with openings in hinged steel frames

Zuo

Zhang

Wang

et al. 2021

Bull Earthquake Eng

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The seismic behaviour of masonry infilled frames has attracted extensive attention from researchers, and it was found that infills normally experienced a diagonal compression under lateral loading. The infill was therefore assumed as an equivalent diagonal strut in structural response estimations of infilled frames, and a force-displacement curve was adopted to describe the mechanical properties of the strut. However, in the development of the force-displacement relationship of infills, the influences of infill aspect ratio, vertical load acting on the surrounding frames, and opening were not systematically addressed.In the present study, detailed three-dimensional finite element models of masonry infilled hinged steel frames are developed in ABAQUS, and a wide parametric study is carried out to investigate the effects of aspect ratio, vertical load, and opening size and location on the lateral stiffness and strength of infill walls. A generalized force-displacement relationship model of infill walls is proposed based on regression analyses of numerical results. The efficacy of the proposed model is examined by using the existing experimental test results, and it shows that the model can accurately predict the lateral stiffness and load-carrying capacity of infill walls and thus has great potential applications in structural designs and analyses for masonry infilled steel frames.

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Multi-strut macro-model for masonry infilled frames with openings

Cited by 30 publications

References 33 publications

Analytical study on effect of central opening of masonry infill to the lateral strength of RC Frame structure

Analytical study on effect of central opening of masonry infill to the lateral strength of RC Frame structure

Influence of Different Types of Infill Walls on the Hysteretic Performance of Reinforced Concrete Frames

Force–displacement relationship modelling of masonry infill walls with openings in hinged steel frames

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