摘要
基于混凝土徐变的继效流动理论、多轴应力作用下混凝土的徐变理论 ,结合钢管混凝土轴心受压构件的受力特点 ,推导出钢管混凝土轴心受压构件徐变的计算公式。该徐变计算公式既考虑了钢管混凝土轴心受压构件徐变的特点 ,又能反应出不同因素 (含钢率、材料强度、应力大小等 )对构件徐变的影响。应用这些公式 ,通过迭代计算得到的钢管混凝土轴心受压构件的徐变 ,与文献[4 ]中的试验数据符合较好。
Based on the elastic continuation and plastic flow theory for concrete creep and the creep theory of concrete under multi axial stresses,and considering the mechanical characteristics of axially compressed concrete filled steel tubular (CFST) members,this paper derives a formula to calculate the creep of axially compressed CFST members.Both the characteristics of core concrete under multi axial stresses and the influential factors of CFST members on creep (such as steel ratio,material strength and stress ratio,etc.)are considered rationally in the formula.The obtained results agree well with the experimental data.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2000年第2期57-60,共4页
China Journal of Highway and Transport
基金
铁道部科技发展基金项目! (J99Z0 71)
关键词
徐变
继效流动理论
轴心受压
钢管混凝土拱桥
concrete filled steel tubular members
creep
elastic continuation and plastic flow theory
axial compression
iteration
