A coupling design method of a UHPC panel structure in a frozen ground foundation

Abstract

This invention discloses a coupled design method for UHPC panel structures in permafrost foundations, relating to the field of permafrost materials technology. The method includes the following steps: calculating the equivalent heat flux between the bottom of the panel and the surface of the foundation; calculating the equivalent depth of action of the permafrost foundation; calculating the equivalent design normal stress of the UHPC panel structure; calculating the safety margin coefficient of the panel structure; calculating the equivalent shear stiffness of the connecting structure; establishing an overall stability evaluation model for the panel structure and calculating the system stability coefficient; and performing joint optimization design to complete the coupled design of the UHPC panel structure in permafrost foundations. This invention constructs a thermo-mechanical coupled design system between the UHPC panel structure and the permafrost foundation, integrating the thermal disturbance of the panel structure, the freezing depth of the permafrost foundation, and the frost heave pressure of the foundation into the structural design process. It also coordinates the crack resistance of the panel with the stiffness of the connecting structure, achieving a full-process coupled analysis from the influence of heat transfer to the stress response of the structure.

Images