Numerical Modeling of Masonry-Infilled Rc Frame Strengthened With TRM

Filippou, Christiana A.; Chrysostomou, Christis Ζ.; Kyriakides, Nicholas

doi:10.7712/120119.7136.19665

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…The location and the cross‐sectional area of the reinforcement of each of the two‐noded bar reinforcement element in the numerical models is according to that of the experimental specimens. It is important to mention that the textile‐based anchors are not modeled, nevertheless, the bond condition provided by the existence of anchors is taken into account in the numerical model as described in Filippou et al 69,70 . All the nodes at the bottom of the unretrofitted and retrofitted infilled frame model are restrained by preventing any translation in the x‐ and y‐direction (Figure 2) to represent the fixed condition between the foundation beam and the infilled frame that was considered in the experiment.…”

Section: Development and Validation Of The Numerical Model Of Masonry...mentioning

confidence: 99%

Numerical study of the seismic retrofitting of masonry‐Infilled RC frames with openings using TRM

Filippou

Kyriakides

Chrysostomou

2023

Earthq Engng Struct Dyn

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The seismic retrofitting of existing masonry-infilled reinforced-concrete (RC) frame buildings is one major challenge of earthquake risk mitigation. In this paper, the use of promising novel alternative composite material, namely textile reinforced mortar (TRM) for seismic retrofitting masonry-infilled RC frames with central openings is examined numerically, to the best knowledge of the authors, for the first time ever. This is achieved by performing a parametric study on a validated 2D numerical model of a three-story masonry-infilled RC frame with and without TRM considering different size of central openings. This parametric study aims to examine (i) the influence of central openings on the lateral response of masonry-infilled RC frames subjected to cyclic loading and (ii) the lateral response of the three-story masonry-infilled RC frame with central openings retrofitted with TRM under cyclic loading. From the results obtained in this study, it was concluded that TRM contributes to increase the lateral capacity, stiffness, and the dissipated energy of infilled frames with openings and at the same time provides a more ductile behavior by delaying the strength and the stiffness degradation of infilled frames due to openings and further by delaying or even preventing brittle failures that occur on infilled frames due to the presence of the opening. New stiffness reduction factors for infilled frames with openings, and for TRM-retrofitted infilled frames with openings are also proposed, which can be used with an equivalent compression strut model and with a tension tiemodel as an everyday practice tool for simulating infilled frames with central openings along the diagonal of the infill wall with and without TRM. A numerical sensitivity analysis is also performed aiming to investigate the influence of (i) the TRM reinforcement ratio and (ii) the type of mortar used for binding the textile reinforcement on the lateral response of the three-story masonry-infilled RC frame retrofitted with TRM subjected to cyclic loading. This study showed that by increasing the reinforcement ratio, or by using high-strength mortars for binding the textile reinforcement, the lateral capacity of infilled frames is increased leading to a more ductile behavior, but this increase is not proportional to the increase This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Section: Development and Validation Of The Numerical Model Of Masonry...mentioning

confidence: 99%

Numerical study of the seismic retrofitting of masonry‐Infilled RC frames with openings using TRM

Filippou

Kyriakides

Chrysostomou

2023

Earthq Engng Struct Dyn

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“…Micro-models can reproduce the infill response in a very refined way, modeling separately bricks, mortar layers, and infillto-frame interfaces (Stavridis and Shing, 2010;Asteris et al, 2013;Filippou et al, 2019). Macro-models are less refined and computationally less demanding, but they are generally able to catch the main influence of the infill on the lateral response of the frame.…”

Section: The Contributions Of Infills To the Seismic Performance Of Rmentioning

confidence: 99%

Seismic Loss Estimation in Pre-1970 Residential RC Buildings: The Role of Infills and Services in Low–Mid-Rise Case Studies

Gaudio

Risi

Scala

et al. 2020

Front. Built Environ.

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The lessons learned after recent earthquakes have highlighted the key role played by infills and services in damage and loss of Reinforced Concrete (RC) buildings. Their influence in seismic performance and loss estimation of selected RC building case studies is thoroughly analyzed here. The case study selection aims to be representative of existing buildings built in Italy before 1970, and covers a different number of stories and design typologies. The seismic responses of the case-study buildings are numerically analyzed by means of non-linear static pushover analysis (PO) considering a lumped plasticity approach with a quadri-linear flexural response for beam/column elements (properly calibrated for RC elements reinforced with plain bars) and a tri-linear compressive-only axial response with diagonal concentric struts for infill panels (empirically derived from experimental data on hollow clay masonry walls). Economic loss estimation is carried out via a component-based methodology that relies on the main repairing activities and resultant costs required for the refurbishment of infills and services for different damage levels. Accordingly, a damage analysis is performed herein, given the intensity measure, based on a comparison between Interstory drift demand from PO analysis and drift-based fragility functions specific for masonry infills. Loss curves, relating the total building repair cost to peak ground acceleration (PGA), are presented and compared for the analyzed case study buildings to show their trends and quantify the incidence of infills and services with respect to the reconstruction cost. A comparison between these outcomes and those recently found in the literature emphasizes the robustness of the considered approach and the reliability of the hypotheses about damage and loss assessment.

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“…These approaches can be summarized in three main families, which are simplistic models (macro-models) [1][2][3], average models (meso-models) [3][4][5][6][7], as well as precise models (micromodels) [1][2][3][4][5][8][9][10]. To highlight evidence of this diversity, we can say that it results from the different characteristics of the different components of these masonry walls without forgetting the interaction between them and the surrounding environment [3][4][5][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Benefit From Chained Masonry Walls to Improve the Seismic Response of Reinforced Concrete Buildings

Nour

Benanane²,

Varum³

2021

CEJ

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The multiple earthquakes have proved the effect of chained masonry walls on the seismic behavior of multistoried reinforced concrete buildings. The chained masonry walls have been considered one of the types of masonry infill walls but without gaps. This participation came intending to study this effect through the modeling of several two-dimensional frames for a multistoried reinforced concrete building, taking into account the hollow brick walls, which represent the most common type in Algeria. We analyzed the proposed models using ETABS finite element software, relying on the response spectrum method and respecting the most important requirements according to the applicable Algerian Seismic Code. After analysis of the different models, the results have been compared according to the parameters of the period, base shear, lateral displacement, and stiffness. Through a critical synthesis of the results, we concluded that these walls could significantly affect the seismic behavior of this type of buildings. Moreover, the neglect of these walls in the modeling process can lead designers to have a false perception of the behavior of these buildings towards seismic loadings.

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Numerical Modeling of Masonry-Infilled Rc Frame Strengthened With TRM

Cited by 4 publications

References 21 publications

Numerical study of the seismic retrofitting of masonry‐Infilled RC frames with openings using TRM

Numerical study of the seismic retrofitting of masonry‐Infilled RC frames with openings using TRM

Seismic Loss Estimation in Pre-1970 Residential RC Buildings: The Role of Infills and Services in Low–Mid-Rise Case Studies

Benefit From Chained Masonry Walls to Improve the Seismic Response of Reinforced Concrete Buildings

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