Influence of key factors on deflection of bonded prestressed concrete simply supported slabs subjected to fire

被引：0
|
作者：
郑文忠 [1 ]
欧阳志为 [1 ]
机构：
[1] School of Civil Engineering,Harbin Institute of Technology
来源：
Journal of Harbin Institute of Technology(New series) | 2010年 / 05期
基金：
中国国家自然科学基金;
关键词：
bonded prestressed concrete; simply supported slabs; fire resistance ratings controlled by deflection;
D O I：
暂无
中图分类号：
TU378 [预应力钢筋混凝土结构];
学科分类号：
081304 ; 081402 ;
摘要：
In order to validate the accuracy of nonlinear fire simulation programs,comparison analysis is carried out between simulation and experiment induced from small-scale specimens,and then fire resistance of large-scale prestressed concrete slabs is further investigated through parameter expansion.The influences on fire resistance ratings controlled by deflection are explored and discussed,including effective span,concrete cover thickness,load level,prestress degree,effective prestress,composite reinforcement index and other factors.The calculated results indicate that fire resistance ratings of large-scale bonded prestressed concrete simply supported slabs are bigger than those of small-scale ones.Finally,the calculation formulas of fire resistance ratings controlled by deflection are established,which rationally consider the influence of effective span,concrete cover thickness,load level,composite reinforcement index and so on key factors.
引用
收藏
页码：615 / 621
页数：7
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