Abstract: This paper presents an elastic nonlinear buckling of a truss-arch structure.The effects of the perfect and the imperfect truss-arch structures on the stability behavior of structure are theoretically investigated by using the large displacement method and Newton-Raphson iteration.Some conclusions of the truss-arch structures design are drawn from the numerical results obtained in the study.

Key words: truss-arch structure； stability； nonlinear buckling； limit load；