Abstract
For the rigid-joint laced column, the estimation method using the continuum analogy for the in-plane elastic buckling load is proposed using the effective strength and effective rigidity. The buckling load obtained by the present continuum method is compared with the result of finite displacement analysis. Main conclusions are as follows.1) For the laced column without coupling terms, for example the column of X-type webs, the elastic buckling load is determined by the lower value of the effective strength by member buckling and the general buckling load. On the elastic buckling, the domain of structural property is clearly divided into two parts. One part is for member buckling, the other is for general buckling.2) For the column of N-type webs with coupling terms of stretching and shearing, the buckling load by the continuum analogy is determined from the intersection point of the effective strength and equilibrium path.3) For the laced columns of N-type weds and X-type webs, the validity of present methods is verified by the comparison with the result of the finite displacement method.
