摘要
根据约束效果等效的原则,将方形套箍约束转化为圆形钢管约束,并根据约束混凝土的泊松效应求出了与试件极限承载力对应的钢管环向应力以及混凝土所受约束应力。在确定了约束混凝土轴压强度计算式的基本数学表达形式之后,按混凝土抗压强度和钢筋抗拉屈服强度的不同对大量方形截面轴压混凝土试件进行分类,并通过回归分析得到了与不同类约束混凝土相对应的公式参数。最后,将本方法所提公式的计算误差与其他4种约束模型进行比较。结果表明:本方法公式具有较高的计算精度。
The square ties confinement into the circular steel confinement base on the principle of the similar confinement effect were transformed, and the circular stress of steel pipe and the confined stress which is corresponding with the ultimate strength of the specimen was calculated according to the Poisson effect of the confined concrete.After confirming the basic math expression form of formula for confined concrete strength, a large number of axial compressed specimens with square section were classified in terms of the compressive strength of concrete and the yield strength of ties,and parameters at verified conditions were proposed on the basis of regression analysis.Finally,this formula was compared with the calculating methods those from the other four models, from the error analysis result a conclusion was made that it is with more accuracy.
出处
《混凝土》
CAS
CSCD
北大核心
2012年第7期10-12,共3页
Concrete
基金
国家自然科学基金重点项目(50838001)
国家自然科学基金面上项目(51078011)
关键词
约束混凝土
轴压强度
泊松效应
试件分类
回归分析
confined concrete
axial strength
poisson effect
specimens classification
regression analysis
