This paper delivered the relationships of uniaxial tensile and compressive stress with strain and bending properties, and felt-bending strength of cement mortar with polyvinyl acetate (PVAC).

The stresses and displacements of membrane structure were discussed and the emphases were put on the requirements of its anchor's tension stiffness and the displacement limitation.

The congenital safety margin and the stress fluctuations which caused by various sensitive parameters combine to the antipulls limit value of the concretes, and create the structure dehiscence.