Increased Bending Strength of Cold-Formed Steel HS-75 Using Diaphragm Plates

摘要

This study discusses a HS-75 profile which has a thickness of 0.8 mm. The aim toudobserve this profile is to get the information whether this profile could replace timberudas a house roof frame or not. This profile was observed in three different conditions.udThe first condition is analyzing the profile without any stiffener plate attach. Theudsecond condition is by attaching one diaphragm plate on the middle of the HS-75udbeam, and the last observed object is a HS-75 beam with three diaphragm plateudattach on certain places along the beam. The modeling and simulation of HS-75 isudimportant to predict the actual strength or some other properties such as strain,uddeflection or deformation. In this study, strength analysis of HS-75 is simulatedudusing finite element method (FEM). The profile strength analysis is simulated onudthree different combinations of diaphragm plate commonly designed for house roofudframe. The HS-75 being analyzed is the beam total deformation. The first step inudpreparing the simulation is producing the HS-75 product using the Ansys workbenchudsoftware. Some HS-75 properties should also be attached, such as the Youngudmodulus, the Poison Ratio and the Tensile Ultimate Strength value. The HS-75udbeam being simulated has a length of 1800 mm, and a plate thickness of 0.08 mm. Theudsecond step is dividing the beam in small part as meshing of the beam. The next stepudis attaching the loads work out on the beam. The last process is simulating the productudby analyzing the directional deformation and the total deformation. FEM static stressudanalysis is also simulated on three different beam conditions. The results showed thatudthe greater the load given to a light steel beam, then the deflection that occurs willudalso be greater. Based on the type of treatment conditions on HS-75 light steel it wasudfound that the deflection occurs at a maximum load of 6500 N is 14.346 mm (withoutuddiaphragm plate), 6.5094 mm (one diaphragm plate attached) and 6.159 mm (threeuddiaphragm plates attached). It can be concluded that the HS-75 light steeludprofile which uses three diaphragm plates has a greater strength compared to theudlight steel profiles using one diaphragm plate and light steel profile without auddiaphragm plate. This methodology serves as a novel approach for HS-75uddesign evaluation, and the study of beam stress behavior in profiles which is needed inudhome properties industries