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
DOI:
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.