钢管自应力自密实混凝土柱偏心受压试验研究  

Experimental research on self-stressing and self-compacting concrete filled steel tube subjected to eccentric compression load

作　　者：黄承逵[1] 尚作庆[1] 张鹏[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024

出　　处：《大连理工大学学报》2008年第4期564-569,共6页Journal of Dalian University of Technology

基　　金：国家自然科学基金资助项目(50578027)

摘　　要：为分析初始自应力对钢管混凝土压弯力学性能的影响,对15根钢管自应力自密实混凝土柱和3根普通钢管自密实混凝土柱进行了偏心受压试验研究.结果表明:与普通钢管自密实混凝土相比,钢管自应力自密实混凝土具有较长的弹性工作段,其随偏心率和长细比的增加而略有下降;初始自应力的存在使核心混凝土在未加载前就处于三向应力状态下,从而显著提高了其密实度,最终使结构获得较高的偏心受压极限承载力;初始自应力对结构的破坏形态几乎没有影响.A total of fifteen self-stressing and self-compacting concrete filled steel tube columns and three self-compacting concrete filled steel tube columns are tested under eccentric compression load to analyze the influence of initial self-stress on the compression behavior of the concrete filled steel tubes. The results show that the elastic working range of column is lengthened because of initial self-stress and it slightly decreases with the increase of load eccentricity ratio and slendernessratio. Because of the initial self-stress, concrete core is always under compression in three directions, so the compactness is enhanced and the ultimate bearing capacity is increased obviously. But the initial self-stress hardly affects the failure mode of the columns.

关 键 词：钢管自应力自密实混凝土 钢管自密实混凝土 初始自应力 偏心受压 极限承载力 

分 类 号：TV335[水利工程—水工结构工程] TU528.571[建筑科学—建筑技术科学]