Translated Title

Analysis of Mechanical Behavior of Hybrid Bridge of CFST Arch and Girder in Construction of Integral Erection

Translated Abstract

In　view　of　the　defects　that　the　stability　of　the　steel　tie　beam　is　poor　and　lots　of　the　prestressing　strands　have　to　be　arranged　for　the　concrete　tie　beam　of　the　hybrid　bridge　of　concrete-filled　steel　tube　(CFST)　arch　and　girder　in　the　integral　erection,the　construction　method　for　the　integral　erection　using　the　steel　tube　stiffen　skeleton　tie　beam　was　proposed.To　study　the　influences　of　the　stiffen　skeleton　tie　beam　on　the　internal　force　distribution　of　the　main　components　of　the　hybrid　bridge　in　the　construction,a　highway　through　hybrid　bridge　of　the　CFST　arch　and　girder　was　cited　as　an　example,the　software　MIDAS　Civil　and　Abaqus　was　used　to　respectively　set　up　the　integral　link　finite　element　model　and　the　arch　spring　joint　solid　finite　element　model　for　the　actual　bridge　and　the　mechanical　behavior　of　the　different　main　components　of　the　bridge　at　the　construction　stages　was　analyzed.The　results　of　the　analysis　indicate　that　the　tensioning　of　the　tie　members　in　the　steel　tube　stiff　skeleton　in　batches　can　reduce　the　steel　tube　stresses　of　the　stiff　skeleton　at　the　construction　stages.The　stiff　skeleton　can　effectively　share　the　arch　rib　stress　in　the　construction　and　make　the　forces　in　the　arch　rib　and　stiff　skeleton　balanced.Finally,the　arch　spring　joints　are　mainly　in　the　longitudinal　compression.The　force　in　the　arch　rib　is　balanced　and　the　stability　calculation　can　accord　with　the　requirements.The　stresses　in　the　hangers　close　to　the　arch　springs　are　slightly　greater　than　those　in　the　hangers　at　the　midspan　and　the　stresses　in　the　hangers　can　accord　with　the　requirements　as　well.

Translated Keyword

arch bridge
concrete-filled steel tube
finite element method
hybrid bridge of arch and girder
integral erection construction
mechanical analysis
steel tube stiff skeleton

Classification

U448.22
U445.464

Type

Project Name

Project No.

Access Number

WF:perioarticalqljs201801005

Language

Chinese

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