Partial interaction analysis of composite beams

Steel-concrete composite construction has been
gaining popularity over the last century thanks to
its ability to well marry the advantages of
structural components made of concrete and steel.
This work studies the behaviour of composite beams
with partial shear interaction by means of the direct
stiffness approach.
An analytical model is presented to describe the
behaviour of m-layered composite beams. For the
particular case of two layers closed form solutions
are derived to predict the composite behaviour in the
linear-elastic range and accounting for time effects.
Based on this model, a direct stiffness approach is
formulated considering linear-elastic material
properties. An extension in the nonlinear range is
proposed and validated against experimental data
available in the literature.
The applicability of this approach is further
extended to account for the time-dependent behaviour
of the concrete. In this case only one discretisation
is necessary, i.e. in the time domain, instead of the
two, i.e. one discretisation in the time domain and
one along the beam axis, required by modelling
techniques available in the literature.

Autorentext

Gianluca Ranzi, BE MscEng PhD: Studied Civil Engineering at TheUniversity of New South Wales, at the Universita' Politecnicadelle Marche and at the University of Wollongong, and Managementand Production Engineering at the Politecnico di Milano. SeniorLecturer at The University of Sydney.

Klappentext

Steel-concrete composite construction has beengaining popularity over the last century thanks toits ability to well marry the advantages ofstructural components made of concrete and steel.This work studies the behaviour of composite beamswith partial shear interaction by means of the directstiffness approach. An analytical model is presented to describe thebehaviour of m-layered composite beams. For theparticular case of two layers closed form solutionsare derived to predict the composite behaviour in thelinear-elastic range and accounting for time effects.Based on this model, a direct stiffness approach isformulated considering linear-elastic materialproperties. An extension in the nonlinear range isproposed and validated against experimental dataavailable in the literature.The applicability of this approach is furtherextended to account for the time-dependent behaviourof the concrete. In this case only one discretisationis necessary, i.e. in the time domain, instead of thetwo, i.e. one discretisation in the time domain andone along the beam axis, required by modellingtechniques available in the literature.