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Non-linear in-plane buckling of shallow concrete arches subjected to combined mechanical and thermal loading
HighlightsCritical buckling loads for a concrete arch under temperature field are derived.Transient thermal strain and basic creep strain are incorporated into analysis.Behaviour contrasts that as in steel arches under same loading conditions.Transient thermal strain significantly reduces buckling strength in concrete arches.Basic creep strain has a minor effect, only slightly reducing stability boundaries.
AbstractIn this paper, non-linear elastic pre-buckling and in-plane buckling analysis for a circular shallow concrete arch subjected to a uniformly distributed load and time-varying uniform temperature field is performed. Transient thermal strain and basic creep strain are considered, the latter modelled using a fractional derivative creep law, to investigate the coupling effects of time, temperature and geometric non-linearity on mechanical behaviour and stability boundaries. The first correspondence principle is invoked allowing the problem to be treated elastically and statically, with the non-linear equilibrium equations derived using the principle of virtual work. Numerical solutions to the variable order fractional derivatives are obtained through a finite-difference based discretisation scheme. Results show that the coupling effect between transient thermal strain and geometric non-linearity is significant as it influences pre-buckling behaviour and reduces buckling strength. Basic creep strain is less influential, causing a slight enhancement of the effects of transient thermal strain.
Non-linear in-plane buckling of shallow concrete arches subjected to combined mechanical and thermal loading
HighlightsCritical buckling loads for a concrete arch under temperature field are derived.Transient thermal strain and basic creep strain are incorporated into analysis.Behaviour contrasts that as in steel arches under same loading conditions.Transient thermal strain significantly reduces buckling strength in concrete arches.Basic creep strain has a minor effect, only slightly reducing stability boundaries.
AbstractIn this paper, non-linear elastic pre-buckling and in-plane buckling analysis for a circular shallow concrete arch subjected to a uniformly distributed load and time-varying uniform temperature field is performed. Transient thermal strain and basic creep strain are considered, the latter modelled using a fractional derivative creep law, to investigate the coupling effects of time, temperature and geometric non-linearity on mechanical behaviour and stability boundaries. The first correspondence principle is invoked allowing the problem to be treated elastically and statically, with the non-linear equilibrium equations derived using the principle of virtual work. Numerical solutions to the variable order fractional derivatives are obtained through a finite-difference based discretisation scheme. Results show that the coupling effect between transient thermal strain and geometric non-linearity is significant as it influences pre-buckling behaviour and reduces buckling strength. Basic creep strain is less influential, causing a slight enhancement of the effects of transient thermal strain.
Non-linear in-plane buckling of shallow concrete arches subjected to combined mechanical and thermal loading
Bouras, Yanni (author) / Vrcelj, Zora (author)
Engineering Structures ; 152 ; 413-423
2017-09-12
11 pages
Article (Journal)
Electronic Resource
English
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