TY - BOOK AU - Ahmed Mohamed Anwar Bassuony AU - Sherif Ahmed Mourad , TI - New technique for conections in cold - formed steel structures / PY - 2014/// CY - Cairo : PB - Ahmed Mohamed Anwar Bassuony , KW - Cold - formed steel KW - Connection KW - Steel ring N1 - Thesis (Ph.D.) - Cairo University - Faculty of Engineering - Department of Civil Engineering; Issued also as CD N2 - A new technique is introduced for mechanical connection of cold formed steel structure. The technique based on using a part of a tube (ring) to be inserted in a pre punched hole and deforming the tube edges to hold the connected part together. The experimental research consisted of three phases, in the first phase the developing the steel O - ring (SOR) was done, the second phase included experimental investigation of 126 test specimens and the third phase included a FE analysis for six models of the new connection using ABAQUS software. The failure modes were identified. Design equations for this new connection were introduced UR - http://172.23.153.220/th.pdf ER -