Simplified numerical model for analysis of steel-concrete composite beams with partial interaction

Resumo

The present study refers to the composite steel-concrete beams analysis considering the various non-
linear effects. These effects generate complexity to the design requiring computational methodologies for the

accurate measurement of structural behavior. With good numerical efficiency, the Refined Plastic Hinge Method

also stands out for its simplicity. This methodology will be used considering rotational pseudo-springs at the fi-
nite elements ends for the simulation of plasticity. However, this approach was developed for isotropic materials

with elastic-perfectly-plastic behavior, implying loss of precision in the analysis of structures containing concrete

in their composition. Furthermore, the effects of partial interaction can not be simulated by the inherently rota-
tional behavior of the pseudo-springs. Thus, the introduction of the cracking and partial interaction effects will

be approached through effective moment of inertia defined by normative criteria for partial shear connection and

using the Patel model for cracking simulation in concrete slab. In addition, geometric non-linearity will be in-
troduced to the model considering a corrotational formulation, dismembering from the rigid body displacements

those that actually cause deformation to the element. The validation of the implementations will be done based on
the comparison with numerical and experimental data present in the literature.