Journal article Open Access

Optimization of the structural coupling between RC frames, CLT shear walls and asymmetric friction connections

Aloisio, Angelo; Pelliciari, Matteo; Sirotti, Stefano; Boggian, Francesco; Tomasi, Roberto

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    <subfield code="a">Seismic retrofitting, Asymmetric friction connections, Cross laminated timber panels, Reinforced concrete structures, Nonlinear dynamic analyses, OpenSees, Bouc– Wen model</subfield>
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    <subfield code="u">University of Modena e Reggio Emilia</subfield>
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    <subfield code="a">Sirotti, Stefano</subfield>
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    <subfield code="u">University of Trento</subfield>
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    <subfield code="a">Boggian, Francesco</subfield>
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    <subfield code="u">Norwegian University of Life Science</subfield>
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    <subfield code="u">University of l'Aquila</subfield>
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    <subfield code="a">Aloisio, Angelo</subfield>
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    <subfield code="a">Optimization of the structural coupling between RC frames, CLT shear walls and asymmetric friction connections</subfield>
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    <subfield code="a">&lt;p&gt;This paper focuses on the optimum design of the e-CLT technology. The e-CLT technology consists in adding cross laminated timber (CLT) walls to an existing reinforced concrete (RC) inflled frame via asymmetric friction connection (AFC). The authors carried out quasi-static and nonlinear dynamic analyses. The RC frame is modeled in OpenSees by fber-section-based elements with force based formulation. The contribution of the infill is simulated using a degrading data-driven Bouc&amp;ndash;Wen model with a slip-lock element while the AFC is modelled with a modified Coulomb model. Different types of infill, aspect ratio, scaling, and member size are considered. The benefits of using e-CLT technology are discussed and the ranges of optimum performance of the AFC are estimated. A comparison of the performance of traditional infill with the e-CLT system is presented. The authors provide optimum intervals of the ratio between slip force and in-plane stiffness of the CLT panel, following energy and displacement-based criteria. The seismic displacement demand under various seismic scenario&amp;nbsp;is investigated. Correlations between the RC characteristics and the optimum design ratios bestow possible criteria for the design of the AFC&lt;/p&gt;</subfield>
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