摘要
基于美国混凝土协会ACI 209(1992)提供的混凝土徐变和收缩模型,对长期荷载作用下中空夹层钢管混凝土柱的变形和承载力进行计算。分析加荷龄期、持荷时间、长期荷载比、名义含钢率、钢材屈服强度、内钢管厚度、混凝土强度、空心率、长细比和荷载偏心率等参数对中空夹层钢管混凝土柱变形特性和承载力的影响。最后,在系统分析各影响因素的基础上,提出长期荷载作用对中空夹层钢管混凝土柱承载力影响系数的计算方法。
Based on the creep and shrinkage models of the concrete under sustained loads proposed in ACI 209 （ 1992）, calculations of the deformation and load-bearing capacity of concrete-filled double skin steel tubular （CFDST） columns are presented in this paper. Influences of several parameters, such as loading age, sustained time, nominal steel ratio, sustained load level, steel strength, inner steel thickness, concrete strength, hollow ratio, slenderness ratio and load eccentricity on the deformation of the columns are analyzed. Formulas to calculate the ultimate bearing capacity of the CFDST columns with long-term sustained loading effects are presented.
出处
《工业建筑》
CSCD
北大核心
2007年第12期22-27,共6页
Industrial Construction
基金
福建省引进高层次人才科研启动费资助项目
福建省科技计划重点项目(编号:2005H033)
关键词
钢管混凝土
中空夹层
长期荷载
变形
承载力
concrete-filled steel tube double skin long-term sustained loads deformation load-bearing capacity
