Civil Engineering Reference
In-Depth Information
5
Axial Deformation Member
The axial deformation member is used widely in structural engineering and its buckling
behavior often attracts more attention in the engineering design and analysis when subjected
to compressive loads. In this chapter, the physical theory model previously presented by
Dicleli
and
Calik
(2008) is selected as a baseline model to develop a modified version for incorporat-
ing it in the force analogy method (FAM). How to use the force analogy method to simulate the
inelastic behavior of axial members under static and dynamical loads is interpreted through
steel tube acted to compressive and tensile loads examples. In addition, the brace as one type
of axial member that is an important structural component in the concentrically braced framed
(CBF) system, so application of the FAM in the CBF is presented to verify the procedure for
solving nonlinear static and dynamic problems.
5.1 Physical Theory Models for Axial Members
Three broad models: finite element models, phenomenological models and physical theory
models are often used to calculate the response of axial deformation members. Physical theory
models, which are based on fundamental structural behaviors, provide an effective and simple
method and typically represent a brace using a beam-column element that can develop a plastic
hinge at mid-length, so they can simulate overall force-deformation response reasonably well,
and a variety of models in this category have been developed.
In this chapter, the physical theory model presented by
Dicleli
and
Calik
(2008) is selected as
a baseline model to develop a modified version for incorporating it in the FAM. This model
