Abstract
This paper deals with the conception and characterization of an innovative connection for cross-laminated timber (CLT) panels. The connection is designed to provide an adequate level of dissipative capacity to CLT structures also when realized with large horizontal panels and therefore prone to fragile shear sliding failure. The connector, named X-bracket, has been theorized and designed by means of numerical parametric analyses. Furthermore, its cyclic behavior has been verified with experimental tests and compared to that of traditional connectors. Numerical simulations of cyclic tests of different CLT walls anchored to the foundation with X-brackets were also performed to assess their improved seismic performances. Finally, the analysis of the response of a 6 m × 3 m squat wall demonstrates that the developed connection provides good ductility and dissipation capacities also to shear walls realized with a single CLT panel.
Highlights
The seismic behavior of cross-laminated timber (CLT) buildings has been studied by numerous researchers from various countries
CLT is classified as a low-ductility system, and a behavior factor q0 = 2 is suggested for the design of CLT buildings, regardless of assembling variables
Cyclic tests were performed according to the quasi-static loading protocol recommended by EN
Summary
The seismic behavior of CLT buildings has been studied by numerous researchers from various countries. Showed that CLT structures are characterized by high strength and stiffness when subjected to seismic actions. They might exhibit low ductility and dissipative capacity if not correctly designed to prevent brittle failure or if realized with large and continuous wall elements, without vertical joints (i.e., if characterized by prevailing sliding behavior). The adoption of large panels with few joints allows the reduction of time and costs for on-site assembling. CLT is classified as a low-ductility system, and a behavior factor q0 = 2 is suggested for the design of CLT buildings, regardless of assembling variables
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