Numerical modelling of timber/timber-concrete composite frames with ductile jointed connection
- Publication Type:
- Journal Article
- Citation:
- Advances in Structural Engineering, 2016, 19 (2), pp. 299 - 313
- Issue Date:
- 2016-02-01
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© The Author(s) 2016. Due to the scarcity of experimental data, this article focuses on the application of detailed finite element models for evaluating structural behaviour of timber-concrete composite frames with post-tensioned beam-to-column joints. In the developed finite element models, nonlinear behaviour and failure mode of timber and concrete under biaxial stress state are captured by hypo-elastic constitutive laws based on the equivalent uniaxial strain concept. In addition to material nonlinearities, the effect of geometrical nonlinearities and nonlinearity of contacts at the concrete slab-to-beam, beam-to-column and slab-to-column interfaces are considered in the finite element models. The accuracy of developed finite element models is verified against available experimental data on post-tensioned timber frames, and the validated analytical tool is used to undertake a parametric study. It is shown that elastic modulus of timber and the details of concrete slab-to-column connection can significantly affect the drift response and failure mode, whereas the compressive strength of timber and stiffness of timber-concrete composite connection have only a minor influence on the drift and failure mode of the timber/timber-concrete composite frames with ductile jointed connections.
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