Geometrically Nonlinear Analysis on the Beam String Structure Composed of Membrane

A whole geometrically nonlinear analysis method of BSSM (Beam string structure composed of membrane) is proposed here to avoid the defect resulted from analyzing membrane and beam string structure separately. The method can consider the effects of changeable stresses of String and Stiffening member. The necessity of the whole analysis subjected to part distributed load is confirmed through computation, analysis and comparison.