Study on flexural performance of H-shaped steel beam wrapped with ceramsite concrete - Details

Author：

Zhang, Ailin (Zhang, Ailin.) | Zhu, Tao (Zhu, Tao.) | Liu, Xuechun (Liu, Xuechun.) (Scholars：刘学春)

Indexed by：

EI Scopus CSCD

Abstract：

In　this　paper,　an　H-shaped　steel　beam　wrapped　with　ceramsite　concrete　was　studied.　The　H-shaped　steel　with　circular　hole　in　the　web　was　wrapped　with　ceramsite　concrete,　and　the　U-shaped　stirrups　were　used　to　improve　the　bonding　performance　between　concrete　and　H-shaped　steel.　The　ceramsite　concrete　has　good　thermal　insulation,　low　heat　transfer　coefficient,　good　waterproof　performance　and　light　weight.　Thus,　it　can　improve　the　fire-proof　and　corrosion-resistant　capability　of　steel　beam　with　a　little　weigh　increasing.　In　order　to　study　the　bearing　capacity　and　concrete　wrapping　effect,　the　static　tests　and　finite　element　analysis　were　carried　out　on　two　groups　of　specimens　with　different　sections.　The　results　show　that　the　built-in　steel　beam　and　the　wrapped　ceramsite　concrete　are　well　bonded.　The　wrapped　ceramsite　concrete　contributes　to　the　bearing　capacity　of　the　beam,　which　can　be　increased　by　about　10%　compared　with　the　pure　steel　beam　without　holes　in　the　web.　Compared　with　the　pure　steel　beam　without　holes　in　the　web,　the　overall　stiffness　has　little　change.　The　bending　performance　of　the　specimen　is　similar　to　that　of　the　reinforced　concrete　beam,　while　the　wrapped　ceramsite　concrete　avoids　the　local　instability　of　the　beam　flange.　According　to　the　finite　element　model　verified　by　experiments,　the　influences　of　the　diameter　of　the　holes,　the　spacing　of　the　holes　and　the　spacing　of　U-shaped　stirrups　on　the　flexural　capacity　of　the　specimens　were　analyzed　through　parametric　analysis.　Under　the　conditions　specified　in　GB　50017-2017　＇Standard　for　design　of　steel　structures＇,　the　bearing　capacity　of　the　specimen　with　web　opening　diameter　less　than　60%　the　beam　height　is　higher　than　that　of　the　pure　steel　beam　without　web　openings.　Opening　spacing　and　U-shaped　stirrup　spacing　have　little　effect　on　flexural　capacity.　The　formulas　for　calculating　the　bearing　capacity　of　specimens　are　derived　and　verified,　and　the　formulas　can　accurately　predict　the　flexural　capacity　for　this　type　of　beam.　©　2021,　Editorial　Office　of　Journal　of　Building　Structures.　All　right　reserved.

Keyword：

Bearing capacity Heat transfer performance Reinforced concrete Steel corrosion Finite element method Corrosion resistance Thermal insulation Steel beams and girders Concrete beams and girders

Author Community：

[ 1 ] [Zhang, Ailin]College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China
[ 2 ] [Zhang, Ailin]Beijing Engineering Research Center of High-Rise and Large-Span Prestressed Steel Structure, Beijing University of Technology, Beijing; 100124, China
[ 3 ] [Zhu, Tao]College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China
[ 4 ] [Liu, Xuechun]College of Architecture and Civil Engineering, Beijing University of Technology, Beijing; 100124, China
[ 5 ] [Liu, Xuechun]Beijing Engineering Research Center of High-Rise and Large-Span Prestressed Steel Structure, Beijing University of Technology, Beijing; 100124, China

Reprint Author's Address：

刘学春
[liu, xuechun]college of architecture and civil engineering, beijing university of technology, beijing; 100124, china;;[liu, xuechun]beijing engineering research center of high-rise and large-span prestressed steel structure, beijing university of technology, beijing; 100124, china

Email：

liuxuechun@bjut.edu.cn

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