Approximate analysis method for modular tubular falsework

This paper presents a derivation of exact expressions of moment-curvature r elations of a circular tubular section. On the basis of these expressions a nd the observed behavior of full-scale specimens, an approximate method of second-order inelastic analysis applicable to pinned supported columns and modular falsework frames is presented. The approximate method is used to ob tain load-deflection curves, and in the solution procedure, a set of simult aneous nonlinear equations is solved using MATHCAD. The load-deflection cur ves compare well with experimental results, and their application is helpfu l for verifying the quality of the modular tubular falsework units used in construction.