This paper presents an analytical static study of the plane truss with rigidity damage. Firstly, an equivalent structure with cyclic periodicity is built. The rigidity damage of the bar can be expressed as an additional loading in the governing equations of a substructure. Then, by using the U-transformation technique, the equations may be uncoupled into independent equations. The nodal displacements are solved in the analytical form. Lastly, a calculation example is taken, and the obtained nodal displacements are compared to the those of a perfect structure. It is shown that the variations of the displacements are reasonable. This paper provides a means for analyzing the influence of the rigidity damage on the plane truss structure.

plane truss structure  /  damage  /  displacement  /  analytical