Finite Element Modeling Of Partially Composite Castellated Beams

Abstract

The aim of this paper is to present nonlinear three dimensional finite element models for both simple and continuous partially composite castellated beams under vertical loads using ABAQUS software. The initial geometric imperfection and material nonlinearities were carefully considered in the analysis. At first, Eigenvalue analysis is carried out to obtain the elastic buckling load and the corresponding buckling mode. In order to trace the entire load-deflection curve, the first buckling mode is factored and inserted into the inelastic geometrical nonlinear analysis of the beam as initial imperfection. Different modeling techniques available in ABAQUS are used for modeling of the shear connectors. The reliability of the models is demonstrated by comparisons with experiments and with alternative numerical and analytical analyses for simple and continuous composite beams. In addition, a parametric study is carried out to investigate the effect of change in cross-section geometries, beam length, alignment of stiffeners, concrete strength, steel strength and concrete slab thickness on the buckling and the overall structural behavior of continuous partially composite castellated beams under vertical loads. A total of 96 continuous partially composite castellated beams are studied. Based on the findings of the finite element results, a number of recommendations on the methods of modeling and on the design of continuous steel-concrete composite castellated beams are suggested.

Experimental Investigation of Composite Deck Slab With Castellated Beam

“…Evans and Wright [8] and Wright et al [9] have carried out more than 200 tests on composite deck slab elements and compared the results with the available design methods. They have studied the aspects of construction phase, composite slab action phase and the composite beam action phase in detail.…”

Finite element modelling of composite castellated beam

“…But, for simplification of the model cause the cost of computation, the beam element was modelled using doubly curved shell elements 4-node with reduced integration (S4R) [7]. The composite behavior was provided using shear connectors (stud) and modelled using multi point constraint (MPC) option for full composite behavior [8]. This assumption used in this model (Fig.…”