ADVANCED LARGE DISPLACEMENT ANALYSIS OF COMPOSITE FLOOR SLABS

Abstract eng:
This paper presents a new method for the large displacement analysis of floor slabs. The proposed method employs a co-rotational framework, where considerable simplification is achieved in determining the orientation of the local element axes. The method is developed for 4-noded quadrilateral elements, where three translational and two rotational degrees of freedom are considered for each node in the global reference system. In this respect, further method simplification is achieved through the choice of two components of each of the nodal orientation vectors as rotational degrees of freedom. Although the proposed co-rotational method can be applied to a wide range of quadrilateral elements for flat slabs and even for curved shells, its application is illustrated herein with reference to a newly developed 4-noded quadrilateral element for flat composite slabs. Several examples are finally provided which demonstrate the applicability, accuracy and efficiency of the new method for large displacement analysis of floor slabs.

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