Temporary and removable quick seismic protection of weak masonry structures using highly deformable adhesives

Kwiecień, Arkadiusz; Gams, Matija; Viskovic, Alberto; Zając, B.

doi:10.1201/9781315616995-207

Cited by 6 publications

(10 citation statements)

References 1 publication

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“…The damping ratio was determined by two different methods: the logarithmic decrement (D.L.) method and the half-power bandwidth (H.P.B) method [6]. The determined damping ratio ξ obtained for various compression levels is presented in Fig.…”

Section: In-situ Test On a Small Masonry Buildingmentioning

confidence: 99%

Quick Seismic Protection of Weak Masonry Infilling in Filled Framed Structures Using Flexible Joints

Viskovic

Zuccarino

Kwiecień

et al. 2017

KEM

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This paper deals with research related to repair and strengthening of weak and brittle masonry infills in R.C. or steel frame structures. Masonry infills are commonly used in 20th century architectural heritage residential and office buildings. In case of earthquake damage to the weak and brittle masonry infills the commercial buildings go out of service and residents of residential buildings are prohibited from living in their homes although the main frame structure is not damaged. The new retrofitting method proposed in this paper may be either a preventive seismic improvement or a quick emergency intervention before seismic aftershocks: it is proposed to use a polymer PM to fill new horizontal and vertical joints between infilling masonry and frame or to fill cracks generated by the earthquake. The test results presented in the paper confirmed ability of polymer PM to fulfil requirements of quick repair material for seismic area.

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Section: In-situ Test On a Small Masonry Buildingmentioning

confidence: 99%

Quick Seismic Protection of Weak Masonry Infilling in Filled Framed Structures Using Flexible Joints

Viskovic

Zuccarino

Kwiecień

et al. 2017

KEM

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“…The applied PS polyurethane matrix manifests some advantageous in comparison to traditionally using epoxy and mineral matrices. It protects masonry structure against brittle behavior in the post failure state, because more effectively links defragmented masonry elements and protects strengthening fibers against stress concentrations, generated by cracks [10].…”

Section: The Ps-polymer Matrixmentioning

confidence: 99%

“…The remaining not reinforced masonry panels, not used in the previous experimental tests campaign carried out some years ago on FRP (epoxy matrices) and FRCM (inorganic matrices) [1,2], were used for testing of recently developed polymer PS. This innovative bonding material belongs to bi-component polyurethane resins [8,9], applied as matrices and adhesive agents in strengthening of masonry structural elements with fibers [10]. This polymer PS was applied in the carried out research as matrix (MP-FRP) joining fibers into a composite and simultaneously as adhesive layer bonding it to the masonry substrate using wet-lay-up method.…”

Section: Introductionmentioning

confidence: 99%

Masonry Panels Composite Reinforcements with Epoxy Matrix, Inorganic Mortar Matrix and PS Polymer Matrix

Viskovic

Zuccarino

Kwiecień

et al. 2014

KEM

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The study mainly deals with methods of historical masonry panel's reinforcement, carried out with composite materials and with comparisons among these methods [1, 2, 3]. More in detail, in the last decade an innovative method of structural strengthening of masonry panels was proposed and tested, represented by recently developed composite structural reinforcements with polyurethane matrix [3] and here are carried out comparisons with the previous ones [1, 2].

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“…Stress concentrations overcome strength of the substrates, generated by stiff adhesives [12,[16][17][18][19]. In seismic areas, high amount of ductility and deformation capacity of structures are required [1,5,20,21], thus other bonding solutions are sought, more compatible with masonry and concrete substrate [22][23][24][25]. The PFJ introduces greater tensile and shear resistance, deformability and ductility and thus greater bearing capacity (damage energy) in the bonded brittle structural elements, also in the post failure deformation zone-making the structure safer [1,15].…”

Section: Introductionmentioning

confidence: 99%

Deformable Polyurethane Joints and Fibre Grids for Resilient Seismic Performance of Reinforced Concrete Frames with Orthoblock Brick Infills

et al. 2020

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The behaviour of reinforced concrete frames with masonry wall infills is influenced a lot by the stiffness and strength difference between the frame and the infill, causing early detrimental damage to the infill or to the critical concrete columns. The paper reports the results from shake table seismic tests on a full-scale reinforced concrete (RC) frame building with modified hollow clay block (orthoblock brick) infill walls, within INMASPOL SERA Horizon 2020 project. The building received innovative resilient protection using Polyurethane Flexible Joints (PUFJs) made of polyurethane resin (PU), applied at the frame-infill interface in different schemes. Further, PUs were used for bonding of glass fibre grids to the weak masonry substrate to form Fibre Reinforced Polyurethanes (FRPUs) as an emergency repair intervention. The test results showed enhancement in the in-plane and out-of-plane infill performance under seismic excitations. The results confirmed remarkable delay of significant infill damages at very high RC frame inter-story drifts as a consequence of the use of PUFJs. Further, the PUFJ protection enabled the resilient repair of the infill even after very high inter-story drift of the structure up to 3.7%. The applied glass FRPU system efficiently protected the damaged infills against collapse under out-of-plane excitation while they restored large part of their in-plane stiffness.

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Temporary and removable quick seismic protection of weak masonry structures using highly deformable adhesives

Cited by 6 publications

References 1 publication

Quick Seismic Protection of Weak Masonry Infilling in Filled Framed Structures Using Flexible Joints

Quick Seismic Protection of Weak Masonry Infilling in Filled Framed Structures Using Flexible Joints

Masonry Panels Composite Reinforcements with Epoxy Matrix, Inorganic Mortar Matrix and PS Polymer Matrix

Deformable Polyurethane Joints and Fibre Grids for Resilient Seismic Performance of Reinforced Concrete Frames with Orthoblock Brick Infills

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