We recently had a requirement to determine the change in direction of the principal stress between two load cases. Specifically, we were modeling the grout between a pile and pile sleeve in a removal operation. The sequence of removal was: Remove structure above waterline. This reduces the stress but probably doesn't change the principal stress [...]
A recent project involved the estimation of the elastic modulus of grout from the compressive strength. When performing an analysis on a to-be-built offshore structure with grouted pile-in-sleeves, the compressive and tensile strength, elastic modulus, and Poisson ratio can be looked up on the datasheet or supplied by the grout vendor. But this project involves [...]
Jack-up installing turbine on mono-pile foundation Offshore wind turbine foundations are designed to owner and jurisdictional specified codes. Typically, North Sea installations would follow Offshore Standard DNV-OS-J101, Design Of Offshore Wind Turbine Structures. Grouted connections are typically used to connect the pile to the sleeve in mono-pile and other constructions. Section 9 of DNV-OS-J101 covers the design requirements for grouted [...]