Abstract
This study presents the results of an experimental and numerical program carried out on unreinforced masonry panels strengthened by textile-reinforced mortar (TRM) plastering. For this purpose, five panels were constructed, instrumented and tested in diagonal shear mode. Two panels were tested as reference. The first reference panel was left unstrengthened, while the second one was strengthened by a traditional self-supporting cement mortar matrix reinforced with steel meshes. The remaining three panels were strengthened by TRM plastering applied on one or both faces and connected with transversal composite anchors. The numerical and the experimental results evidenced a good effectiveness of the TRM systems, especially when applied on both panel facings.
Highlights
Introduction on Masonry Panels StrengthenedUnreinforced masonry (URM) has a long history of being the predominant building technique in Romania and in Europe
Despite the available studies carried out to investigate the shear structural behavior of the URM strengthened with textile-reinforced mortar (TRM), which highlighted the effectiveness of this type of strengthening system, some important aspects have still not been fully investigated
The remaining three URM panels were strengthened by plastering on one face or on both faces with a two-component ready-mixed, high ductility pozzolan-reaction mortar reinforced with an alkali-resistant (AR), pre-primed glass fiber mesh (Figure 6) [47,48]
Summary
Unreinforced masonry (URM) has a long history of being the predominant building technique in Romania and in Europe. Despite the available studies carried out to investigate the shear structural behavior of the URM strengthened with TRM, which highlighted the effectiveness of this type of strengthening system, some important aspects have still not been fully investigated The latter may refer to anchorage methods for masonry walls which enable intervention works on both faces (the side-to-side connection) or on a singular face (the middle-to-side connection); the increase in lateral capacity based on the type and configuration of the transversal connectors, pattern and effective length for various types of anchorages; the characteristic failure modes for the systems with additional reinforcement due to the radial ends of the anchorages; and the synchronization between the experimental and numerical analyses based on adapted modelling strategies. The experimental results are compared to the ones obtained through a micro-detailed finite element analysis and a general good agreement is found
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