Effect of infill walls on behavior of reinforced concrete special moment frames under seismic sequences

Jalaeefar, Ali; Zargar, Azam

doi:10.1016/j.istruc.2020.09.029

Cited by 23 publications

(6 citation statements)

References 28 publications

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“…When an earthquake occurs, the infill can strengthen the upper storey of the structure and form a soft first storey; however, this is unacceptable from the perspective of an earthquake-resistant building [13]. The following were investigated based on the effects of infilled frames on structures under seismic action [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Influence of Different Interface Materials and Openings in Infill of Reinforced Concrete Infilled Frames

Kumar¹,

Srinivasan²,

Varatharajan³

et al. 2023

ACAE

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This study analytically investigates the behaviour of trapezoidal infilled frames (TIFs) with brick masonry infills having openings and various interface materials between the brick panel and reinforced concrete frame. Single-storey single-bay frame specimens are analysed under in-plane static loading. For this investigation, the optimum angle of the column inclination for the trapezoidal frame must be determined in terms of maximum lateral stiffness. The optimum angle must be further analysed and compared with rectangular bare and infilled frames, with various materials of the interface. This infilled frame is extended to analyse the openings in the infill further. To study the effects of openings in infilled panels, TIFs with different sizes and positions of window openings are analysed and compared with the rectangular frame. This study further analyses three different combinations of interfaces and determines the intermediate stiffness of the frame combination. The main focus of this investigation is to reduce the high rigidity of the TIF leading to high base shear. It is found that, the infilled frame is stiffer than the bare frame, and the cement mortar interface is stiffer than the lead–cork interface. This research uses ABAQUS software, a finite element analysis program, for expanding the observational analysis.

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Section: Introductionmentioning

confidence: 99%

Influence of Different Interface Materials and Openings in Infill of Reinforced Concrete Infilled Frames

Kumar¹,

Srinivasan²,

Varatharajan³

et al. 2023

ACAE

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“…They found that infills with no irregularity in elevation have advantages for buildings and, therefore, the global lateral displacements of buildings can be reduced. Other studies that are related to pushover analysis can be found in [22][23][24]. Although pushover analysis seems to provide satisfying results, this type of analysis cannot be used to simulate the actual phenomenon resulting from earthquake shaking because earthquake forces do not incrementally increase; in other words, the sign and shape of earthquake forces are randomly varied and reversed.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Seismic Performance for Low-Rise RC Buildings with Different Patterns of Infill Walls

Saengyuan

Latcharote

2022

Buildings

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Evaluating the structural performance of low-rise RC buildings with infill walls is an essential issue in Thailand, as most infill walls were not designed for lateral load resistance. The purpose of this study was to predict the structural behavior and illustrate the effects of infill walls. Residential, commercial, and educational buildings were selected as representative buildings with different patterns of infill walls. Based on the results, infill walls contributed to considerable strength and stiffness. Most of the infill walls that affected the low-rise buildings were at the ground floor level. The behavior of the buildings that had a contribution of infill walls was found to be brittle until the infill walls collapsed, and then the buildings became ductile. Some patterns in which infill walls were placed improperly led to a torsional effect, resulting in columns in the affected areas reaching failure criteria more than those without this effect. Considering the NLRHA procedure, only infill walls on the ground floor contributed to the building being subjected to a ground motion. The fully infilled frame tended to reach the infill crack before the other patterns. For the UMRHA procedure, only the first vibration mode was adequate to predict seismic responses, such as roof displacement and top-story drift.

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“…On the other hand, in recent years, different aspects of the role of masonry infills on RC moment frames have been investigated such as the effects on seismic behavior, seismic response, damages and reduction in collapse safety under seismic sequences. [17][18][19][20][21] But the effect of masonry infills on seismic resilience of RC moment frames with special ductility is not investigated. Therefore, in this study, the overall framework of calculating structural resilience presented in HAZUS 22 is implemented on RC moment resisting frames with special ductility using economic and engineering parameters in Iran.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of the seismic resilience of reinforced concrete special moment frames with infills

Hejazi

Jalaeefar

2022

Structural Concrete

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In this paper, the role of infills in seismic resilience of reinforced concrete moment frames with special ductility is investigated. For this purpose, frames of 4, 8, and 12 stories are simulated in OpenSees software in three cases, namely, bare frame, frame with infills, and frame with infills having openings. Using incremental dynamic analysis, their capacity and demands are evaluated and fragility curves are plotted via statistical methods. Finally, resilience index is calculated by quantifying seismic damages under a selection of 15 earthquake records. Based on the results, infills decrease structural losses and increase resilience in different hazard levels. The effect of infills on resilience index grows in higher hazard levels and this is much more impressive in low rise frames. In the other hand, infill openings, less decrease the resilience index in tall buildings than shorter ones.

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Effect of infill walls on behavior of reinforced concrete special moment frames under seismic sequences

Cited by 23 publications

References 28 publications

Influence of Different Interface Materials and Openings in Infill of Reinforced Concrete Infilled Frames

Influence of Different Interface Materials and Openings in Infill of Reinforced Concrete Infilled Frames

Investigation of Seismic Performance for Low-Rise RC Buildings with Different Patterns of Infill Walls

Investigation of the seismic resilience of reinforced concrete special moment frames with infills

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