中空夹层钢管混凝土柱在长期荷载作用下的力学性能研究  

BEHAVIOR OF CONCRETE-FILLED DOUBLE SKIN STEEL TUBULAR COLUMNS SUBJECTED TO LONG-TERM SUSTAINED LOADS

作　　者：李永进[1] 陶忠[1] 

机构地区：[1]福州大学土木工程学院,福州350002

出　　处：《工业建筑》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)

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.

关 键 词：钢管混凝土 中空夹层 长期荷载 变形 承载力 

分 类 号：TU398.9[建筑科学—结构工程]