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Title: A holistic calculation and design tool for structural SFRC members

Author(s): Look, K.; Mark, P.

Publication: Symposium Paper

Volume: 343

Issue:

Appears on pages(s): 442-451

Keywords: Design tool, spreadsheet analysis, SFRC, optimisation, yield line theory, cross section design

Date: 10/1/2020

Abstract:
An open design tool is developed that uses spreadsheet analyses, optimisation methods and iterative analytical routines. Its idea is to offer a universal, intuitive instrument to economically design and optimise steel fibre reinforced concrete members with or without rebar. The tool comprises non-linear evaluations of sectional forces with the yield line theory, a cross sectional design in ultimate and serviceability limit states as well as backward oriented optimisations of reinforcements, cross sectional properties or fibre classes. It should be free of specific code regulations and thus just basis on the assumption of plane strains, an ideal bond and requires the definitions of uniaxial stress-strain laws, strain boundaries and fundamental design formulas. Boundary conditions, material parameters and sectional properties as well as results like strain or stress distributions, performance ratios and potentials of improvements are given in visualisations and commented figures. The non-linear equations of equilibrium are iteratively solved with reduced gradient methods. Doing so, recursive initial parameter settings of the strain plane are – amongst other regularisations – incorporated to achieve robust solutions.




  

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