Study on out-of-plane behaviour of unreinforced masonry strengthened with welded wire mesh and mortar

Shermi, C.; Dubey, R. N.

doi:10.1016/j.conbuildmat.2017.03.002

Cited by 63 publications

(22 citation statements)

References 10 publications

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“…The disasters caused by recent earthquakes motivated the scientific community in developing innovative strengthening systems for masonry constructions . Nevertheless, the understanding of the weaknesses of historical masonry buildings and, therefore, the design of effective strengthening interventions is a challenging task .…”

Section: Introductionmentioning

confidence: 99%

Ambient vibration-based finite element model updating of an earthquake-damaged masonry tower

Bassoli

Vincenzi

D’Altri

et al. 2018

Struct Control Health Monit

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This paper presents a vibration-based model updating procedure for historical masonry structures which have suffered severe damage due to seismic events.This allows gathering in-depth insights on the current condition of damaged buildings, which can be beneficial for the knowledge of their actual structural behaviour and, consequently, for the design of repairing and strengthening interventions. The methodology, based on the experimentally identified modal parameters, is tested on the San Felice sul Panaro medieval fortress, which was heavily damaged by the 2012 Emilia earthquake. The finite element mesh of the structure in its post-quake condition is generated by means of a nonstandard semi-automatic mesh generation procedure based on a laser scanner points cloud. Ambient vibration testing is performed on the main tower of the fortress. Mechanical properties of the tower and the level of connections with the rest of the fortress in its current damaged state are investigated. To fully characterize the actual behaviour of the tower in operational condition, mesh elements corresponding to the damaged masonry are identified and different material properties are assigned to them. This allows to account for the effect of damage and cracks, which appeared essential in the calibration process. The updating procedure is carried out by means of an advanced surrogate-assisted evolutionary algorithm designed for reducing the computational effort.

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Section: Introductionmentioning

confidence: 99%

Ambient vibration-based finite element model updating of an earthquake-damaged masonry tower

Bassoli

Vincenzi

D’Altri

et al. 2018

Struct Control Health Monit

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“…Compared with conventionally reinforced walls, this method could achieve a remarkable increase in the cracking load triple, in addition to improving the durability and enhancing the appearance. Shermi and Dubey [27] used welded wired mesh (WWM) to strengthen the masonry, and the results show that WWM could enhance the flexural strength and ductility of masonry. Some researchers also used shaking table tests to study the out-of-plane performance of masonry walls.…”

Section: Introductionmentioning

confidence: 99%

Out‐of‐Plane Shaking Table Tests on Seismic Response of RC Frame Infilled with a New Type of Shale Fired Heat‐Insulation Blocks

Zhang

Yu³

et al. 2020

Advances in Materials Science and Engineering

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Shale fired heat-insulation block, which is made of shale, fly ash, building rubbish, and waste paper, is a new type environment-friendly product. In order to study the mechanical properties of shale fired heat-insulation block walls, four full-scale walls were tested under El-Centro, Taft, and Ninghe earthquakes using shaking table equipment, in which the influence of the spacing of cast-in-place belt and the connection between the wall and the frame on the out-of-plane seismic performance of the wall was taken into account. The subject of this study is mainly about out-of-plane dynamic response of masonry walls in terms of frequency, displacement, and acceleration. It could be concluded that the cast-in-place belt and the rigid connection between wall and RC frame could effectively reduce the out-of-plane seismic response of the infill masonry wall. Finally, the recommendations for the use of this type of block in the structure are given.

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“…Seismic strengthening of masonry structures has been an important research subject. Among the existing strengthening techniques, using traditional materials for surface treatments is the main categories [9][10][11][12][13][14]. By adding concrete or mortar layers on the masonry surface, the integrity of masonry structures can be strengthened.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Seismic Behavior of Masonry Walls Strengthened by Reinforced Mortar Cross Strips

et al. 2019

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Due to the poor seismic performance, strengthening of masonry structures is always a significant problem worthy to study. It has been proven that the bearing capacity of existing masonry buildings can be enhanced greatly with efficient strengthening measures. An experimental program was conducted to investigate seismic performance of un-reinforced masonry (URM) walls strengthened b,y reinforced mortar (RM) cross strips. Eleven walls were tested under horizontal low-cyclic load, simultaneously with a vertical constant load on the top face. Three URM walls were tested as reference. The other eight walls were externally strengthened with 40 and 60 mm thick of RM cross strips on one or both faces. Test results showed that externally strengthening with RM cross strips was an efficient way to enhance the seismic performance of URM walls. The failure modes were divided into shear failure and shear-compression failure. All the tested walls did not collapse until the test ended, while many diagonal cracks and few vertical cracks appeared on mortar strips. After strengthening, the shear capacity of the strengthened walls increased by at least 38.2%, and the reinforcement ratio was noted to be the key factor to influence the shear capacity with positive correlation. Besides, RM cross strips did improve deformation capacity greatly.

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Study on out-of-plane behaviour of unreinforced masonry strengthened with welded wire mesh and mortar

Cited by 63 publications

References 10 publications

Ambient vibration-based finite element model updating of an earthquake-damaged masonry tower

Ambient vibration-based finite element model updating of an earthquake-damaged masonry tower

Out‐of‐Plane Shaking Table Tests on Seismic Response of RC Frame Infilled with a New Type of Shale Fired Heat‐Insulation Blocks

Experimental Study on Seismic Behavior of Masonry Walls Strengthened by Reinforced Mortar Cross Strips

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