In situ repair technique of infill masonry walls in steel frames damaged after an earthquake

Ghobadi, Mohammad Soheil; Jazany, Roohollah Ahmady; Farshchi, Hamidreza

doi:10.1016/j.engstruct.2018.10.022

Cited by 15 publications

(11 citation statements)

References 57 publications

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“…The procedure, composed of the in situ test and the updated numerical model, was implemented for a case study to confirm that it is effective in defining the mechanical characteristics of the masonry, the absence of collaboration between the two brick leaves of the infill wall, and the out‐of‐plane constraints along the perimeter. In 2019, Ghobadi et al presented the scientific information about masonry buildings in terms of the structural performance of different masonry walls, usual pre‐earthquake retrofitting methods, and postearthquake repair methods. In their repair method, cracks in the damaged masonry infill are stitched by crimped wire meshes in the shape of Band‐Aids and cementitious plaster was used to coat the attached wire meshes.…”

Section: Related Workmentioning

confidence: 99%

Deep neural network‐based mechanical behavior analysis for various masonry infill walls with hybrid fiber mortar

Pitchaipillai¹,

Kumar²

2019

Structural Concrete

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Reinforced Concrete buildings with masonry infills are among the most common structural systems in many countries with regions of high seismicity. Masonry infill walls increase robustness of damaged RC structures. Although their mechanical contribution is usually neglected in structural analysis and design, they significantly affect the seismic response of RC frames. In this paper, we concentrate on the development of infill walls by using various structure design and brick types. An experimental investigation is carried out on two types of mortar mixes like conventional mortar and mortar used with hybrid fibers (polypropylene, sisal, kenaf, and aramid). Here, two types of masonry brick infills such as clay bricks and fly ash bricks are used. After construction of the specimens, each was marked properly according to their respective test of total 60 specimens, which have conventional and fiber‐mixed mortars. After 28 days curing, the masonry specimens attain their full strength and they became ready for the test. The material ratio followed to construct test specimens was according to the Indian standard. The shear test is conducted for masonry triplets and the flexural test is conducted for masonry wall panel structures. After that, the mechanical properties of this structure are validated with the help of the Restricted Boltzmann Machine (RBM)‐based Deep Neural Network (DNN). The performance of the proposed modeling is evaluated by comparing with those of the existing techniques.

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Section: Related Workmentioning

confidence: 99%

Deep neural network‐based mechanical behavior analysis for various masonry infill walls with hybrid fiber mortar

Pitchaipillai¹,

Kumar²

2019

Structural Concrete

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“…In the proposed fix technique, breaks in the harmed masonry infill are skewed by pleated wire networks in the state of Band-Aid and cementitious mortar is utilized to cover the appended wire networks. Moreover, the outcomes demonstrated that the fix strategy not just reestablished the lost strength of the harmed infill yet, in addition, recouped the solidness and ductility of the reference example dependent on the experimental proof [22]. Shan et al (2019) worked on the impact of masonry infill walls on breakdown components of steel frames enduring fire situations.…”

Section: Introductionmentioning

confidence: 99%

“…An analytical method based on finite element analysis is used with a certain number of parameters such as frame, masonry, panel, hinge, joint, and interface elements [21]. Ghobadi et al (2019) displayed the logical data about masonry structures as far as the structural execution of various masonry walls, normal pre-seismic tremor retrofitting strategies and post-quake fix techniques. In the proposed fix technique, breaks in the harmed masonry infill are skewed by pleated wire networks in the state of Band-Aid and cementitious mortar is utilized to cover the appended wire networks.…”

Section: Introductionmentioning

confidence: 99%

Effect of Masonry Infill Walls with Openings on Nonlinear Response of Steel Frames

2021

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The infill walls are usually considered as nonstructural elements and, thus, are not taken into account in analytical models. However, numerous researches have shown that they can significantly affect the seismic response of the structures. The aim of the present study is to examine the role of masonry infill on the damage response of steel frame without and with various types of openings systems subjected to nonlinear static analysis and nonlinear time history analysis. For the purposes of the above investigation, a comprehensive assessment is conducted using twelve typical types of steel frame without masonry, with full masonry and with different heights and widths of openings. The results revealed that the influence of the successive earthquake phenomenon on the structural damage is larger for the infill buildings compared to the bare structures. Furthermore, when buildings with masonry infill are analyzed for seismic sequences, it is of great importance to account for the orientation of the seismic motion. The nonlinear static response indicated that the opening area has an influence on the maximal strength, the ductility and the initial rigidity of these frames. But the shape of the opening will not influence the global behavior. Then, the nonlinear time history analysis indicates that the global displacement is greatly decreased and even the behavior of the curve is affected by the earthquake intensity when opening is considered. Doi: 10.28991/cej-2021-03091653 Full Text: PDF

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“…Results showed high effectiveness in restoring the structural integrity of retrofitted structures, and the bearing capacity of treated structures under cyclic load was found to be two times higher. The substantial restoration efforts are dedicated to earthquake-impaired masonry structures [ 20 , 21 ]. In this connection, Khan and Ali [ 22 ] optimized application of reinforced-concrete stiffeners to confined brick masonry structures to effectively resist seismic loading.…”

Section: Introductionmentioning

confidence: 99%

“…Horizontal and vertical stiffeners designed via diagonal approach were found to be the eligible solution in view of economical and seismic demands. In studies conducted by Ascione et al [ 20 ] and Ghobadi et al [ 21 ], fabric-reinforced mortars or stitched wire mesh were applied to infilled cement plasters which helped to restore the stiffness and ductility of damaged masonry. A specific approach has to be devoted in view of historical monuments.…”

Section: Introductionmentioning

confidence: 99%

Lightweight Concretes with Improved Water and Water Vapor Transport for Remediation of Damp Induced Buildings

et al. 2021

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Most of the historical and old building stock in Europe are constructed from masonry, when brick, stones, or their combination are bound with traditional mortars. Rising damp, due to accompanying effects, is the main factor influencing the quality of indoor climate as well as having an important impact on the durability of masonry structures. In this study, new types of lightweight concrete with waste aggregate content as a suitable material for remediation of damp damaged masonries were designed and tested. Alternative aggregate served as silica sand substitution in the range of 0–100 vol.%. Basic structural properties, mechanical resistance, water, and water vapor transport properties were measured after 28 days of water curing and were compared with dense reference concrete and with traditional masonry materials as well. Moreover, the porous structure of produced concretes and changes caused by usage of alternative aggregate usage were evaluated with the mercury intrusion porosimetry (MIP) technique. Obtained experimental data showed the suitability of modified concretes with 25–50 vol.% of waste aggregate content to ensure acceptable strength and hydric properties, and these properties were found to be comparable with masonry structures and materials used in the past.

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In situ repair technique of infill masonry walls in steel frames damaged after an earthquake

Cited by 15 publications

References 57 publications

Deep neural network‐based mechanical behavior analysis for various masonry infill walls with hybrid fiber mortar

Deep neural network‐based mechanical behavior analysis for various masonry infill walls with hybrid fiber mortar

Effect of Masonry Infill Walls with Openings on Nonlinear Response of Steel Frames

Lightweight Concretes with Improved Water and Water Vapor Transport for Remediation of Damp Induced Buildings

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