摘要
应用弹性力学中的能量法和最小势能原理,对钢管混凝土进行了小变形下的弹性理论分析。导出了钢管混凝土柱在轴向压力作用下的套箍系数、组合轴压弹性模量的理论计算公式。分析结果表明:套箍系数不仅与核心混凝土的泊松比、横截面直径及单向受压时的弹性模量有关,而且还与钢管的泊松比、钢管径厚比及单向受压时的弹性模量有关。理论计算公式算得的结果与按照统一理论所得的结果相近。理论计算公式能够准确可靠地描述钢管混凝土构件在小变形下的弹性行为及套箍机理。
By means of energy method and minimum potential energy principle of elasticity, the elasticity theory analysis of infinitesimal deformation was performed for the concrete filled steel tube （CFST）. The hooping mechanism coefficient, theoretic formulas of the composite axis pressed elastic modulus were gained. Analytical results indicate that the hoping coefficient is not only influenced by the Poisson＇ ratio, ratio of diameter to wall thickness and the elastic modulus of the concrete, but also influenced by the Poisson＇ ratio, diameter of section and the elastic modulus of the outer steel shell. The calculated results by the theoretic formulas are approximately equal to the results gained by unified theory. The theory formulas can actually and reliably describe the elasticity behaviors of infinitesimal deformation and the hooping mechanism of CFST.
出处
《工程力学》
EI
CSCD
北大核心
2007年第11期121-125,共5页
Engineering Mechanics
基金
国家自然科学基金资助项目(50478044)
关键词
钢管混凝土
套箍机理
能量法
组合弹性模量
理论公式
concrete filled steel tube
hooping mechanism
energy principle
composite elastic modulus
theoretic analysis
