Flexure Behavior of Prestressed RC Modula for Onshore Wind Tower Foundation

In prefabricated wind power foundations, prefabricated modules are assembled into a unified structure using prestressed shear key tooth splicing joints. Key-tooth splicing joint is one of the primary forms of dry splicing used in assembly buildings and segmental assembly bridges engineering. It is necessary to take the compressive strain of concrete at the edge of the compression zone as the failure state to constitute flexural capacity calculation method for the assembled beam with double-bond tooth-shaped dry joints. Based on the plane section assumption, force balance theory, sectional equilibrium and deformation coordination mechanism are illustrated considering the mechanical characteristics of unbonded prestressed tendons and the elastic-plastic constitutive model of concrete. Based on ABAQUS finite element analysis, flexural behaviors are analyzed and to examine the bending performance and failure state of double-bond tooth-shaped dry joints under various initial local compressive stresss. The proposed calculation formula for bending capacity are verified finally and gets good agreements with the finite element analysis results.