Equivalent Analysis of Elastic Constants and Stability Calculation of Corrugated-arch Metal Roof

摘要

Corrugated-arch Metal Roof has anisotropic properties because of transverse small corrugations covering the surface of the structure. Thus the panels should be considered as orthotropic plates for more accurate analysis. Based on the principle of stressed skin diaphragm, elastic constants of Corrugated-arch Metal Roof with corrugations are analyzed using equivalent methods; the formulas for equivalent elastic constants are produced and the simplified calculation model is established. The stability of the structure is analyzed and evaluated by use of the finite element method. The results are compared with experimental results, and the method of equivalent analysis is validated. The results indicate that the theoretical bearing capacity is determined by overall stability under full-span and half-span loading without considering the initial defects. Through the equivalent analysis, the length and depth of corrugations are main factors affecting the equivalent elastic constants. Design recommendations are finally presented.