Study of the Seismic Response on the Infill Masonry Walls of a 15-Storey Reinforced Concrete Structure in Nepal

Furtado, André; Pouca, Nelson Vila; Varum, Humberto; Arêde, António

doi:10.3390/buildings9020039

Cited by 34 publications

(18 citation statements)

References 18 publications

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“…However, the infilled RC frame buildings have often demonstrated a different seismic performance due to the presence of the masonry, both in terms of seismic demand and capacity (Smith, 1962;Crisafulli, 1997;Rodrigues et al, 2018;Furtado et al, 2019). Sometimes after an earthquake, soft story mechanisms, short columns effects, or additional torsional actions due to an irregular distribution of infills can be observed (Dolsek and Fajfar, 2001;Ricci et al, 2011Ricci et al, , 2013.…”

Section: Introductionmentioning

confidence: 99%

The Role of Infill Walls in the Dynamic Behavior and Seismic Upgrade of a Reinforced Concrete Framed Building

Angelis

Pecce

2020

Front. Built Environ.

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Masonry infill walls are commonly used in the frames of reinforced concrete (RC) buildings around the world. The seismic performance of these buildings is strongly affected by the presence of the infill walls and partitions, as shown by the post-earthquake damage in many cases. The effect of these components is particularly important for RC frame constructions underdesigned for seismic actions that usually are characterized by deformable frames magnifying the contribution of the infill walls to the seismic response. Also the flexibility of the floors could be influenced by the collaboration of the infill walls to the transversal stiffness of the building. The paper addresses the seismic assessment of a typical infilled RC frame building designed only for gravity loads in the 1960s in the Southern of Italy that currently is a high-seismic zone. The structural identification of the building based on ambient vibration test has been already done pointing out the significant role of infill walls and partitions through the updating of the numerical model. Based on the results of the calibrated model, the effect of the floor flexibility on the dynamic behavior of the structure is discussed, and the seismic capacity at life safety limit state (LSLS) is assessed by means of the linear dynamic analyses. The effects of the infill walls on the seismic performance of the building are discussed in detail considering a strengthening solution that involves the infill panels as masonry walls cut from the RC columns to avoid the local interaction but strengthened by composite grids in mortar matrix (FRCM).

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Section: Introductionmentioning

confidence: 99%

The Role of Infill Walls in the Dynamic Behavior and Seismic Upgrade of a Reinforced Concrete Framed Building

Angelis

Pecce

2020

Front. Built Environ.

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“…In Ref. [5], Furtado et al observed the impact of proving infill walls in a 15 story RC building and conclude in 20% increment in its story shear and base shear results. However, in most cases, the influence of infill walls may cause an extensive damage or collapse of structure [6].…”

Section: Introductionmentioning

confidence: 99%

Influence of Infill Masonry on a Building Frame Under Seismic Loadings and Its Hazards Vulnerability Assessment

Mannan¹

2020

IJST

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Objectives/methodology: In this study, a four-story frame structure is modelled using finite element software in two different conditions of infill and without infill masonry effects. A pushover analysis is carried out to assess the seismic response and building performance under three different loading conditions of modal, triangular, and uniform loading. The all-possible loadings in negative and positive directions have been applied and building response is measured. A performance capacity curve in terms of base shear is developed for all possible loading scenarios. Finally, a comparison of bare and infill frame has been made and some conclusions were made. Findings/ application: Uniform loading among all three categories is found to be higher in capacity for both types of frames in positive and negative directions. The presence of non-structural masonry walls results in a better behavior of frames compared to bare frame. They initially increase the strength, stiffness, and energy dissipation of frames despite their brittle failure.

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“…The results of the previous studies have been summarized that unreinforced brick masonry infill contributes to increase the lateral strength and stiffness but decrease the ductility of infilled RC frame structures [2][3][4][5]. However, the brick masonry infill recurrently failed out of the plane direction in many cases of earthquake events [6]. For providing excellent ductility performance on infilled frame structure and preventing the out of the plane failure of masonry infills, several strengthening methods have been developed by researchers such as the use mesh carbon and mesh glass [7], the use passive compression method [8], and reinforcements embedded in mortar bed joints.…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of brick masonry infilled frame structures with bed joint reinforcements

et al. 2020

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This paper presents the evaluation of the seismic performance of brick infilled RC frame structures with bed joint reinforcements based on reversed cyclic lateral load tests. Three specimens of the structural model of 1/4 scale-down single-story single-bay brick infilled RC frame was prepared, which were brick infilled RC frames with and without bed joint reinforcements. Two specimens of brick infills with bed joint reinforcements were different in the spacing of bed joint rebars. The specimens were tested by applying a reversed cyclic lateral loading in-plane direction. During the tests, the crack propagation was observed at the peak and residual drifts of each loading cycle to recognize the failure mechanisms of the specimens. As the results, although the use of the bed joint reinforcements ineffective to increase the lateral strength of the overall infilled frame structure. The rebars in mortar bed joints role to sustain the lateral strength in plastic deformation, and provide the whole structure with high ductility. It seemed that the rebars in mortar bed joints confined the brick infills. Therefore, the infilled RC frames can survive in large deformation without failure of the infills in out of the plane direction.

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Study of the Seismic Response on the Infill Masonry Walls of a 15-Storey Reinforced Concrete Structure in Nepal

Cited by 34 publications

References 18 publications

The Role of Infill Walls in the Dynamic Behavior and Seismic Upgrade of a Reinforced Concrete Framed Building

The Role of Infill Walls in the Dynamic Behavior and Seismic Upgrade of a Reinforced Concrete Framed Building

Influence of Infill Masonry on a Building Frame Under Seismic Loadings and Its Hazards Vulnerability Assessment

Seismic performance of brick masonry infilled frame structures with bed joint reinforcements

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