AWAM International Conference on Civil Engineering 2019 (AICCE'19) - Nibong Tebal - Malaysia (2019-08-21)

FEA OF THE EFFECT OF SCREW NUMBER ON THE CONNECTION BEHAVIOUR FOR COLD FORMED STEEL TRUSS SYSTEM
The demand for cold formed steel (CFS) has increased due to its advantages such as lightweight with high strength to weight ratio, easy for transportation, can be manufactured in different configurations and shapes and etc. There were different types of connections such as bolt, welded, rivet and screw. Amongst all these connections, there were very limited researches on screw connection, es-pecially when it was used on steel trusses. In this research, the screw connec-tions at the side and peak location of Fink and Howe truss were being modelled using LUSAS. Lipped channel (LCS) and rectangular hollow section (RHS) were selected as material of cold formed steel truss. By modifying the number of screws, the behaviors in different cases were compared. Through finite element analysis, the connection strength based on the results such as displacement, stress, shear and moment were discussed. Besides, design checking on the shear and tension resistance of screw connection were carried out following the pro-cedures prescribed in Eurocode 3. The outcomes of modelling results show that both types of cross sections gave different performances. In general, the behav-iors of screw connection not necessarily improved when more screws were add-ed to the connection. The number of screws was affected the function of screw connection in truss system but uncommonly affected. Overall, the typical num-ber of screws were suitable to support the truss system.
Assoc. Prof. FATIMAH DE'NAN, Assoc. Prof. CHOONG KOK KEONG, Miss JESSICA LOW SI JIA, Mrs. NOR SALWANI HASHIM