THE EFFECT OF GEOMETRIC ON BUCKLING STRENGTH OF RECTANGULAR HOLLOW PIPE UNDER PURE BENDING

Not only the circle hollow pipe but also the rectangular hollow pipes are used on construction. The pipe subjected various kind of load. In this research, the bending moment was given at both end of pipe. It is known that strength of buckling moment can be reduced by increasing the length of the pipe. The rectangular pipe models are varying from a/b = 0,125; 0, 25; 0,5; 1; 2; 4; a/t = 10, 15 and L/a = 10, 15, 20. The finite elements method was used to analysis of buckling strength. The buckling strength will increase with decreasing a/b. The deformation at mid span will be shown. The buckling strength will decrease with increasing of a/t and L/a.