FATIGUE STRENGTHS OF TRUSS MADE OF HIGH STRENGTH STEELS

This study investigates the fatigue behavior of trusses. Various types of panel-point-structures were designed for the purpose of obtaining compact and strong nodal joint, and fatigue tests of the structural models on the scale of about one quarter were carried out. Based on the previous study, details of nodal joint were improved and the process of corner weld was changed from manual shielded arc welding to submerged-arc welding. The local stresses distribution in the vicinity of nodal joint and their influences on the fatigue strength are also shown through the finite element stress analysis.