Nonlinear Seismic Analysis of Masonry Infill RC Buildings with Eccentric Bracings at Soft Storey Level

Khan, Danish; Rawat, Aruna

doi:10.1016/j.proeng.2016.08.490

Cited by 23 publications

(3 citation statements)

References 7 publications

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“…On the other hand, adding SB to masonry infill RC buildings is a cost-effective technique and an effective tool for increasing the strength of soft story. In other words, the additional BS provides the soft story with the necessary rigidity [6]. It is obvious that X-DB hinders the vehicles and mobility, particularly in developing countries where the areas are limited, and the parking space on the first floor is the only option [7].…”

Section: Literature Reviewmentioning

confidence: 99%

Using bracing systems to improve the seismic performance of moment resisting frame

Gamal¹

2022

JES. Journal of Engineering Sciences

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Bracing systems [BS] have been widely adopted as the primary lateral load resisting system in medium and high-rise buildings due to their inherent substantial lateral stiffness and load resistance, and it is considered the most effective method for fusing existing RC structures. Therefore, the seismic response of steel braced frames [SBF] with bracing members connected to the columns had been explored for a moment-resisting frame [MRF]. And different configurations of BS had been investigated to study their effects on lateral load resistance and get the optimized bracing configurations. Moreover, the study doesn't take into consideration only the BS over the height of the building, but it also reduces the length of the bracing element by adding many bracing panels over the height of stories which can lead to an increase in the resistance of seismic loading. The bracing panels can be an effective technique in dealing with the architects' constraints. Therefore, smaller brace components can be chosen for studying to avoid the architect's constraints and create different configurations while still meeting code criteria for brace strength and overall slenderness. The earthquake behavior of the retrofitted structure was analyzed by distributing the SB of various types (X, V inverted) over the height of the RC frame. The results demonstrate that the smaller brace components for X & V inverted bracing can contribute to reducing the lateral displacement and maximum story drift.

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Section: Literature Reviewmentioning

confidence: 99%

Using bracing systems to improve the seismic performance of moment resisting frame

Gamal¹

2022

JES. Journal of Engineering Sciences

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“…The design for most of the buildings in the neighbourhood was based on an open-plan space in the ground level in order to face severe floods as those occurred in the region during the 1960-70 decade. This soft-story configuration clearly influenced the building seismic performance because of the concentration of shear forces and displacements on the weaker frames, induced by abrupt changes of stiffness in height [30][31][32]. This effect was commonly referred to as the failure mechanism in the damage report completed by experts after the earthquake [33].…”

Section: The Building Structural Description and Numerical Modelmentioning

confidence: 99%

Assessment of Post-Earthquake Damaged Building with Interferometric Real Aperture Radar

et al. 2019

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In this study the main results of a detailed analysis of an actual building, which was severely damaged during the Mw 5.1, May 11th 2011, Lorca earthquake (Murcia, Spain) are presented. The dynamic behavior of the building was analyzed by means of empirical and numerical approaches. The displacement response of the building submitted to ambient noise was recorded by using a Real Aperture Radar (RAR). This approach provides a secure remote sensing procedure that does not require entering the building. Based on the blueprints and other available graphical information about the building, a numeric 3D model was also set up, allowing obtaining capacity spectra and fragility curves in the two main resistant directions of the building. The main purpose of this study was to check out the feasibility of the RAR-based method to detect the safety state of a damaged building after an earthquake, without the need of entering unsafe structures. A good consistency of the numerical and experimental approaches and the observed damage was obtained, showing that RAR interferometric-based tools may provide promising supplementary remote sensing methods to safely survey and report about the structural health and the operative conditions of buildings in post-earthquake scenarios.

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“…They are widely used in frame structures and masonry buildings with the frame structure being used at lower floor for resisting earthquakes [36]. Khan's [37] study showed that buildings with eccentric bracings have lower drift demand and probability of collapsing. The results obtained by Varum [38] showed that a retrofitting bracing system that was adopted for the structure was tested to be appropriate and that its location in the structure may highly influence the overall structural seismic response.…”

Section: Novelty Of the Designmentioning

confidence: 99%

Study on Dynamic Response of Novel Masonry Structures Impacted by Debris Flow

et al. 2017

Sustainability

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Debris flow is a very destructive natural disaster. This paper presents a novel masonry structure with strong resistance to debris flow-by using walls that are set with braces and filled with straw bricks. This structure was designed according to the concepts of sustainability. In order to study the dynamic response of this novel masonry structure under debris flow, finite element models of different masonry structures were established by means of LS-DYNA software. The responses of this novel structure and other traditional structures were calculated and compared when the rock of debris flow hits the center of the wall. Results showed that the out-of-plane stiffness of the impacted wall with cross braces was enhanced in this novel structure, leading to an increased resistance to the impact of debris flow more effectively. Furthermore, braces were able to stop rocks in the debris flow and dissipate the corresponding energy through deformation. These braces also improved anti-collapse capabilities, leading to an increase in the safety of people's lives and properties. This novel structure is a response to national policies and plans, which plays an active role in promoting sustainable development of society.

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Nonlinear Seismic Analysis of Masonry Infill RC Buildings with Eccentric Bracings at Soft Storey Level

Cited by 23 publications

References 7 publications

Using bracing systems to improve the seismic performance of moment resisting frame

Using bracing systems to improve the seismic performance of moment resisting frame

Assessment of Post-Earthquake Damaged Building with Interferometric Real Aperture Radar

Study on Dynamic Response of Novel Masonry Structures Impacted by Debris Flow

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