焊接环式箍筋约束高强砼柱裂缝开裂  

Cracks in High-Strength Concrete Columns with Ring Welded Stirrups

作　　者：李升才[1] 罗小庆[1] 章炯[1] 

机构地区：[1]华侨大学土木工程学院,福建泉州362021

出　　处：《华侨大学学报（自然科学版）》2010年第4期458-462,共5页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(50948036);厦门市科技计划项目(3502Z20073035)

摘　　要：对6个轻型节能钢-混凝土组合结构柱的低周期反复加载试验研究,分析各构件的延性、耗能性能、承载力,以及开裂过程和裂缝发展规律.结果表明,在轴压比相同时,高强混凝土柱的延性随着含箍特征值的增大而增大;而在含箍率相同时,其延性随轴压比的提高而明显下降,轴压比对延性的影响比箍筋因素要显著.柱的延性随着轴压比的增加而减小.使用高强度焊接环式箍筋,能有效改善高强混凝土柱的延性,特别是在较高轴压比下,箍筋的作用更加明显.The experiment of the six energy-saving light-steel concrete composite structures is carried out under the low cyclic loading,to analyze the ductility,energy dissipation,load carrying capacity and crack.The main results show： on condition of constant axial compression ratio,the ductility of high-strength reinforced concrete columns increases with increasing the stirrup characteristic value;on condition of constant stirrup characteristic value,the ductility decreases with increasing constant axial compression ratio;the influence of axial compression ratio on the ductility is greater than that of stirrup.Ring welded stirrup with high strength can improve the ductility of column with high strength concrete.Especially for the higher axial compression ratio,the role of stirrups is more obvious.

关 键 词：轻型节能钢-混凝土组合结构 开裂过程 抗震性能 延性 轴压比 

分 类 号：TU375[建筑科学—结构工程]