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Experimental and analytical study of Friction Connection for seismic retrofit with Cross‐Laminated Timber (CLT) panels
Author(s) -
Boggian Francesco,
Aloisio Angelo,
Tomasi Roberto
Publication year - 2022
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/eqe.3724
Subject(s) - cross laminated timber , stiffness , dissipation , structural engineering , retrofitting , slip (aerodynamics) , engineering , connection (principal bundle) , geotechnical engineering , aerospace engineering , physics , thermodynamics
Within the European project e‐SAFE (Energy and Seismic AFfordable rEnovation solutions), this paper presents the experimental tests and modeling attempts for a class of Asymmetric Friction Connections (AFCs) tested in the laboratories of the Norwegian University of Life Sciences. The AFCs are part of the seismic retrofitting solution, called e‐CLT, based on installing Cross‐Laminated Timber (CLT) panels in reinforced concrete structures using friction connections. The authors carried out experimental tests on AFCs fixed with screws to a CLT panel to observe the contribution of timber to the total dissipation performance. The investigation is based on 20 cyclic test data with two different setups. The main one includes a CLT panel and screw connection, while the second one isolates the friction behaviour to evaluate the influence of the screw connection. A modified LuGre hysteresis model for friction is developed to simulate the experimental cyclic response of the tested specimen. The model possesses a direct physical meaning, and it explicitly depends on the slip force and the pre‐slip stiffness. The optimized model is used to assess the performance of the AFC by varying the pre‐slip stiffness and the slip force.