The Stiffness and Bearing Capacity of Polymer Flexible Joint under Shear Load

Kisiel, Paweł

doi:10.1016/j.proeng.2015.06.111

Cited by 5 publications

(2 citation statements)

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“…Therefore, an innovative solution is proposed in this paper that uses a polymer-based material as a joint member between the masonries and the RC frames. They are called PolyUrethane Flexible Joints (PUFJ) and have already been tested for various purposes in the past [ 33 , 34 , 35 ]. Large deformability capacity, together with the high bonding strength, makes PUFJ an alternative solution that can protect both infill walls and RC frames against earthquakes.…”

Section: Introductionmentioning

confidence: 99%

Seismic Protection of RC Buildings by Polymeric Infill Wall-Frame Interface

2021

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This paper is aimed at investigating the usage of flexible joints in masonry infilled walls surrounded by reinforced concrete (RC) frames. For this purpose, a real-size specimen was numerically created and exposed to the seismic loads. In order to evaluate both in-plane and out-of-plane performances of the infill walls, the system was chosen as a box shaped three-dimensional structure. In total, three different one-story constructions, which have single bays in two perpendicular directions, were modeled. The first type is the bare-frame without the infill walls, which was determined as a reference system. The second and third types of buildings are conventional mortar joint and PolyUrethane Flexible Joint (PUFJ) implemented ones, respectively. The influence of these joints on the material level are investigated in detail. Furthermore, general building dynamic characteristics were extracted by means of acceleration and displacement results as well as frequency domain mode shapes. Analyses revealed that PUFJ implementation on such buildings has promising outcomes and helps to sustain structural stability against the detrimental effects of earthquakes.

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Section: Introductionmentioning

confidence: 99%

Seismic Protection of RC Buildings by Polymeric Infill Wall-Frame Interface

2021

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“…The principle is based on using a polymer material called as Polyurethane PM, which has hyper-elastic features that allows high ductility to be used as flexible joints. Many studies are already done regarding the usage of this specific material as Polymer Flexible Joints (PFJ) in structures [7][8][9][10]. Within the scope of this study, three different joint connection types are investigated.…”

Section: Introductionmentioning

confidence: 99%

Stress distribution in masonry infills connected with stiff and flexible interface

Akyildiz¹,

Kowalska-Koczwara²,

Kwiecień³

2019

J. meas. eng.

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Masonry infills are largely used in RC structures for various purposes, and in seismic zones, they are also preferred for providing earthquake resistant systems. However, due to the rigid connection between infills and RC frames, these systems are vulnerable when large deformations are demanded. Cyclic loads that are occurring during seismic excitations cause stress concentration level to increase, particularly in frame-infill contact zones. As a result of stress increment, infill panels get weaker in terms of both in-plane and out-of-plane resistance. These drawbacks cause loss of lives and properties, thus affecting governments and societies adversely. In order to overcome this obstacle, an innovative solution is proposed which uses flexible polymers (Polyurethane PM) as joint elements for protecting the structural elements. The research is focused on numerical analyses of three types of frames with masonry infills, which are excited through both in-plane and out-of-plane directions by different earthquake records. Infill walls are connected to the frames in three manners: stiffly (classical approach), with flexible joints at 3-boundaries and with flexible joints at 4-boundaries. Differences in calculated stress distribution as well as some other linear and non-linear results are presented and discussed. The primary results give promising outcomes that this new method might be used in seismic zones for protecting structures.

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