Investigation on Fire Resistance of Prestressed Fire-resistant Steel-concrete Continuous Composite Beams

Flexural properties of fire-resistant steel-concrete prestressed continuous composite beams at high temperatures were numerically investigated. Material nonlinearity,geometric nonlinearity and initial geometric defect of the composite beam were introduced. Effects of fire condition cases and distrib...

Full description

Saved in:
Bibliographic Details
Published inFangzai Jianzai Gongcheng Xuebao no. 6; p. 902
Main Authors Zhou, Huanting, Zheng, Zhiyuan, Wu, Xianxing, Qin, Han, Zhang, Supeng
Format Journal Article
LanguageChinese
Published Nanjing Zhongguo Zaihai Fangyu Xiehui 01.01.2020
Subjects
Composite beams
Composite materials
Concrete
Critical temperature
Deflection
Failure analysis
Failure modes
Fire resistance
Fire resistant materials
Flanges
Geometric nonlinearity
Heat resistance
High temperature
Nonlinear systems
Steel
Steel beams
Steel structures
Webs (structural)
Online AccessGet full text

Cover

More Information
Summary:Flexural properties of fire-resistant steel-concrete prestressed continuous composite beams at high temperatures were numerically investigated. Material nonlinearity,geometric nonlinearity and initial geometric defect of the composite beam were introduced. Effects of fire condition cases and distributed location of fire-resistant steel along the longitudinal axis of composite beams were obtained,by analyzing failure modes,fire resistance,and the variation of mid-span deflection with temperature or with time. The results show that:different fire scenarios have great influence on the fire resistance performance of both regular and fire-resistant steel-concrete composite beams,the mid-span deflection of composite beams under a combination of fire condition decreases faster than the beams under onesided fire conditions,and the critical time is significantly shortened;Under the same fire scenario,it is found that composite beams with refractory steel flanges and regular steel webs have excellent flexural capacity
ISSN:1672-2132