Experimental observations on the in-plane behaviour of masonry wall infilled RC frames; focusing on deformation limits and backbone curve

Alwashali, Hamood; Torihata, Yuta; Jin, Kiwoong; Maeda, Masaki

doi:10.1007/s10518-017-0248-x

Cited by 31 publications

(9 citation statements)

References 14 publications

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“…Infill masonry 1 st layer mortar masonry precedes sliding of un-strengthened masonry infill masonry, as observed in the experimental work by authors in Zahura et al (2020) and Alwashali et al (2018), therefore the combination of sliding and diagonal cracking is considered herein as one of the failure mechanism. However, when the sliding plane is at the interface of beam soffit and upper infill masonry course, it might also be possible to get an extremely short column failure of the tension column that might fail by horizontal slip shear failure, as shown in Fig.…”

Section: Connection With Rc Framementioning

confidence: 80%

“…In general infill masonry exhibits diagonal compression crushing, joint sliding, and/ or diagonal cracking, whereas RC columns fail by the formation of plastic hinges or shear failure of RC columns. In some of the cases, especially when sliding occurs at the mid-height, a short column is also evident (Zahura et al 2020 andAlwashali et al 2018). By careful observation, it has been perceived that diagonal cracking of infill 2 nd layer mortar Wire mesh…”

Section: Fig 1 Schematic Diagram Of Fc Strengthened Masonry Infill 2 Identified Load Transfer Mechanisms In Past Experimental Studiesmentioning

confidence: 99%

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Lateral Strength Evaluation of Ferrocement Strengthened Masonry Infilled RC frame Based on Experimentally Observed Failure Mechanisms

Sen

Alwashali

et al. 2021

Preprint

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In developing countries, lateral strengthening of seismically vulnerable masonry infilled RC buildings is one of the major concern. In this context, ferrocement can be used as a low cost and less labor-intensive strengthening scheme for those buildings. This study aims to experimentally identify major failure mechanisms, and to develop a lateral strength evaluation procedure of ferrocement strengthened masonry infilled RC frame. Subsequently, ductility of all of the identified major failure mechanisms is compared. Mainly four major failure mechanisms (i.e. overall flexural, column punching-joint sliding, diagonal compression, and diagonal cracking-sliding) are identified from the current experimental work and past experimental studies. The strength evaluation procedure, based on the identified failure mechanisms, is proposed and verified with an average calculated to experimental lateral strength ratio of 0.8. Among the identified failure mechanisms, overall flexural, and diagonal cracking-sliding mechanisms showed relatively ductile behavior when compared to the ductility of column punching-joint sliding, and diagonal compression failure mechanism.

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Section: Connection With Rc Framementioning

confidence: 80%

Section: Fig 1 Schematic Diagram Of Fc Strengthened Masonry Infill 2 Identified Load Transfer Mechanisms In Past Experimental Studiesmentioning

confidence: 99%

Lateral Strength Evaluation of Ferrocement Strengthened Masonry Infilled RC frame Based on Experimentally Observed Failure Mechanisms

Sen

Alwashali

et al. 2021

Preprint

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“…Constructions such as Reinforced Concrete (RC) frame with unreinforced brick masonry (URM) are commonly observed all over the world particularly in the seismically active regions [1,2]. In Pakistan, the low-rise URM building is commonly practiced.…”

Section: Introductionmentioning

confidence: 99%

Shake Table Response of Unreinforced Masonry and Reinforced Concrete Elements of Special Moment Resisting Frame

Shah

Khan

Ali

et al. 2019

Advances in Civil Engineering

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Half-scaled reinforced concrete frame of two storeys and two bays with unreinforced masonry (URM) infill walls was subjected to base excitation on a shake table for seismic performance evaluation. Considering the high seismic hazard Zone IV of Pakistan, reinforcement detailing in the RC frame is provided according to special moment resisting frames (SMFRs) requirement of Building Code of Pakistan Seismic-Provisions (BCP SP-2007). The reinforced concrete frame was infilled with in-plane solid masonry walls in its interior frame, in-plane masonry walls with door and window openings in the exterior frame, out-of-plane solid masonry wall, and masonry wall with door and window openings in its interior frame. For seismic capacity qualification test, the structure was subjected to three runs of unidirectional base excitation with increasing intensity. For system identification, ambient-free vibration tests were performed at different stages of experiment. Seismic performance of brick masonry infill walls in reinforced concrete frame structures was evaluated. During the shake table test, performance of URM infill walls was satisfactory until design ground acceleration was 0.40g with a global drift of 0.23%. The test was continued till 1.24g of base acceleration. This paper presents key findings from the shake table tests, including the qualitative damage observations and quantitative force-displacement, and hysteretic response of the test specimen at different levels of excitation. Experimental results of this test will serve as a benchmark for validation of numerical and analytical models.

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“…In contrast, the amount of damage to RC building with masonry infills was lower than RC building without masonry infills. Alwashali et al, (2018) [4] investigated the backbone curve and deformation of masonry infilled RC frames. For this purpose, they tested two infilled RC frames.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Force Transfer Mechanism and Seismic Behavior of Masonry Infilled RC Frames with Windows Opening

Vahidi

Moradi

2019

Civ Eng J

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Masonry infilled walls are widely used in reinforced concrete (RC) frams worldwide. However, infilled RC frame building failure is a common mode in destructive earthquakes. Further researcher is needed to bring insightful understandings into the behaviors of these structures. Therefore, this study investigates seismic parameters, ultimate tensile damage, and force transfer mechanisms in a reinforced concrete structure under in-plan load. For this purpose, the definitions and the relevant literature were reviewed. Then, an analytical software supporting an infill model was selected and described altogether with a particular modeling approach. Calibrating software results with those presented by Abdulhafez et al. (2014), the researchers designed a series of planer one-story one-bay reinforced concrete frames upon ACI 318M-14 Building Code. The seismic behavior of infilled frames were also studied using finite element method. Force transfer mechanisms in infilled frame with opening, which is one of the important items, was investigated in this study. Comparing the analysis outcomes with the bar frame, it was indicated that the ultimate load, stiffness, and toughness of the full in-filled frame were increased while the ductility was decreased. It was also revealed that the presence of opening in infilled frame decreased the ultimate load, stiffness and toughness corresponding full infilled frame. In addition, the increasing of opening size increased the reduction of the ultimate load, stiffness and toughness.

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Experimental observations on the in-plane behaviour of masonry wall infilled RC frames; focusing on deformation limits and backbone curve

Cited by 31 publications

References 14 publications

Lateral Strength Evaluation of Ferrocement Strengthened Masonry Infilled RC frame Based on Experimentally Observed Failure Mechanisms

Lateral Strength Evaluation of Ferrocement Strengthened Masonry Infilled RC frame Based on Experimentally Observed Failure Mechanisms

Shake Table Response of Unreinforced Masonry and Reinforced Concrete Elements of Special Moment Resisting Frame

Numerical Study of the Force Transfer Mechanism and Seismic Behavior of Masonry Infilled RC Frames with Windows Opening

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