Rothoblaas - Plates and Connectors Page 172
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SEISMIC-REV Reduction of Earthquake Vulnerability The Seismic-REV project (Reduction of Earthquake Vulnerability) had the clear aim of reducing the seismic vulnerability of the timber constructions, by studying and then characterizing the behavior of the traditional metallic connections used to assemble timber buildings . An innovative connection system, named X-RAD, that is meant to be used for residential CLT buildings (Cross Laminated Timber, i .e . timber panels made of layers of boards arranged perpendicularly one to each other), has also been proposed . This research project involved different institutions . Together with Rothoblaas, collaborated the CNR-IVALSA Institute of San Michele all’Adige and the University of Trento, where the experimental and research work has been carried out . The scientific report on experimental testing is available at Rothoblaas . CONNECTORS (screws, nails, ...) Cylindrical connectors (such as screws and nails) under both tensile and shear loads, for timber-to-panel, steel-to-timber and timber-to-timber joints . 1 2 3 Steel-to-timber specimen with LBS screws tested in shear Sheathing-to-framing specimen with ring nails tested in shear load 25 15 20 10 5 0 Timber-to-timber specimen with HBS screws tested in shear 2 30 20 force [kN] force [kN] Timber-to-timber specimen with VGZ inclined screws tested in combined tension and compression 1 25 4 -5 15 10 5 0 -10 M_OSB2,8x80 -15 C_OSB2,8x80_1 -5 -10 -20 -15 -10 -5 0 5 10 15 20 25 35 0 2 4 6 8 10 12 14 16 18 displacement [mm] displacement [mm] 3 40 4 30 35 20 10 25 force [kN] force [kN] 30 20 15 0 -10 10 M_HBS10x160 -20 5 C_HBS10x160_2 -30 0 0 1 2 3 4 5 6 7 8 9 displacement [mm] 172 | SEISMIC-REV | PANELS AND BUILDING JOINTS 10 -40 -30 -20 -10 0 10 displacement [mm] 20 30 40
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