On the formulation of geometrically nonlinear 3D-Rebar-elements using the enhanced assumed strain method

摘要

This paper presents the combination of the Rebar-concept with the enhanced assumed strian method for geometrically nonlinear 3D-bricks. Finite element calculations with Rebar elements are used to model composite materials with single fibers or fiber layers within one single volume element. The application of global geometric functions to describe single fiber courses, allows an easy computing of single fiber composite structures. In combination with work equivalent nodal forces for the load case prestress, prestressed concrete beams can be calculated. Rebar fiber layer elements are employed successfully for modelling composite laminate structures.