Translated Title

Trial Parameter Design of Circular Concrete-Filled Steel Tubular Sections Based on Confinement Effect

Translated Abstract

In　order　to　rapidly　select　the　sectional　parameters　of　concrete-filled　steel　tubular　members,a　discussion　on　the　matching　of　material　strength　combinations　was　conducted,by　exploring　the　axial　compression　performance　of　stub　columns　that　best　reflects　the　confinement　effect.Then,within　the　proposed　range　of　this　combination,the　calculation　methods　of　ultimate　bearing　capacity　and　residual　bearing　capacity　coefficient　of　stub　columns　subjected　to　axial　load　were　studied.Simultaneously,the　combined　characteristics　of　sectional　parameters　of　the　same　ultimate　bearing　capacity　and　residual　bearing　capacity　coefficient　were　investigated.The　results　show　that　proceeding　from　the　fully　playing　confinement　effect　and　the　effective　utilization　of　concrete　strength,concrete　should　enter　plasticity　after　steel　tube　and　the　delay　time　of　that　should　not　too　be　late.Within　this　combination　limitation　of　material　strengths,and　without　the　case　of　ultra-thin-walled　steel　tube,the　calculation　method　of　ultimate　bearing　capacity,which　confinement　effect　only　considers　the　influence　of　concrete　strength,is　reasonable.According　to　the　requirement　that　the　strength　loss　of　the　available　inelastic　deformation　should　not　be　too　low　and　the　maximum　utilization　in　material　strength　has　been　reached,the　suggestion　of　the　residual　bearing　capacity　coefficient　can　be　proposed.With　the　same　ultimate　bearing　capacity　and　residual　bearing　capacity　coefficient,the　increase　of　concrete　strength　can　better　reduce　outer　diameter　of　the　column　or　section　weight　and　increase　of　steel　strength　can　better　reduce　the　steel　consumption.

Translated Keyword

concrete filled steel tube
confinement effect
residual bearing capacity
sectional parameter
strength combination
ultimate bearing capacity

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Project No.

Access Number

WF:perioarticaljzgjgjz202312006

Language

Chinese

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