Equivalent Three Bending Moment Equations and Rigidity Analysis of Continuous Ladder Beam

In this paper,with beam rigidity conversion, a ladder beam(or axis)is converted into beam (or axis)of identical cross area, of which the deflection curve equation is presented by singular function. In addition, the three bending moment equations of ladder beam (or axis) are reasoned out. An example is given for the analysis of rigidity conversion of continuous ladder beam. The method presented in the paper is convenient for computer analysis and calculation.