Rosette-Joints and Rosette Steel Trusses. Research Report and DesignRecommendations

摘要

This report reviews the results of an extensive research program carried out atthe Helsinki University of Technology on a new joining technique for steel sheets based on the Rosette-joint. The behavior of the joint itself, roof truss structural members and full scale roof trusses has been analyzed both theoretically and experimentally A series of shear tests was carried out to determine the shear strength capacity values of the joint. The capacities determined using simple shear tests and the performance of the joints in roof truss applications were verified by T-joint sub-assembly tests whose results were in compliance with those of the simple shears tests. The use of a Rosette tube-bolt inserted into the hole of the Rosette joint increases the capacity of the basic joint by approximately 1030%. The shear capacity design values according to the European and American design standards have been determined based on the T-joint test results. The shear capacity values of the Rosette-joint were found to be sufficient for applications in light-weight steel-framed wall panels or light-weight steel trusses.