Material properties of membrane and its influence on structural behaviors

The main failure modes of membrane structures were analyzed.In the local full-size model experiments of membrane roof in Expo axis,significant differences were observed between the experimental data and the theoretical data.This is due to that the constitutive relations used in the theoretical analysis are not accurate with the misunderstanding of the material properties.Therefore,a better understanding of the material properties is important for the research,application and utilization of membrane structures.A systematic research on the mechanical property of common building membrane materials was conducted,including uniaxial tests,biaxial tests,viscoelasticity tests,and temperature tests.The tensile strength and constitutive surfaces were studied,in which the effects of temperature on the material mechanical properties were considered respectively.Several common models were used to predict the viscoelasticity of membrane materials.Finally,further work was proposed.