ABSTRACT
In order to further study the flexural performance of PVC formwork, the finite element models of PVC formwork and independent steel support were established on the basis of experimental research. The effects of the span of formwork, spacing of transverse ribs, spacing of stiffeners, and the thickness of the panel on the flexural performance of PVC formwork and the effects of the supporting height, the wall thickness of the steel tube, and the boundary conditions on the stress and displacement of the steel support are analyzed. The test results show that the bearing capacity and flexural stiffness of the specimens reduce with the increase in the span of formwork, spacing of transverse ribs, and spacing of stiffeners. With the increase in the thickness of the panel, the bearing capacity and bending stiffness of the specimens improve. The change of boundary conditions has a great effect on the bearing capacity and overall stability of the independent steel support, but the wall thickness of the steel tube has no obvious effect on the mechanical properties of the independent steel support. The calculated results of the finite element model are in good agreement with the experimental results, and the established finite element model has high accuracy in predicting the load-deflection relation curve of the specimens. In addition, the relevant design methods and constructional measures of PVC formwork are put forward to lay the foundation for the design and engineering application of PVC formwork.
