Deformation behavior simulation of a sub-rafter welded truss

The deflection of a welded sub-rafter truss under external static loads applied to the nodes of the upper chord was investigated. Experimental force testing and computer simulation experiments were conducted on a physical model of the truss with dimensions of 2000x400 mm. Based on the study results, numerical and graphical data sets were obtained regarding the deflection of the investigated truss under external loads ranging from 2.5 kN to 45 kN. The results from the computer simulation closely matched those from the experimental force testing, with a 94.2% correlation, indicating linear deformation behavior. Furthermore, computer modeling was used to study the truss's deformation behavior under higher loads, identifying the locations of maximum stress concentration. The study also determined the load limits that induce the structure's ultimate state. The methodology and findings are recommended for designing such trusses to ensure high accuracy in results, thus providing the necessary durability of welded sub-rafter trusses throughout their service life.