钢管混凝土短柱补偿收缩试验研究  

Experimental Study on Shrinkage Compensation of Concrete Filled Steel Tubular Short Column

作　　者：顾欣欣[1] 田安国[1,2] 蔡小宁[2] 王金兰[1] 郭江培 

机构地区：[1]中国矿业大学力学与土木工程学院,徐州221116 [2]淮海工学院土木与港海工程学院,连云港222005

出　　处：《混凝土与水泥制品》2017年第6期37-41,共5页China Concrete and Cement Products

基　　金：江苏省高校自然科学研究项目(15KJB560001);国家自然科学基金项目(51508220);江苏省自然科学基金项目(BK20130408)

摘　　要：为探究钢管混凝土短柱的收缩变形并补偿收缩,进行了2个钢管混凝土短柱收缩试验和5个不同膨胀剂掺量收缩补偿试验研究。试验结果表明,普通钢管混凝土在密封状态下,早期发生膨胀,之后由于水化收缩、徐变收缩及温度收缩等使混凝土发生收缩现象;径向收缩的影响会使钢管对混凝土的紧箍力推迟产生,影响钢管混凝土的力学性能;膨胀剂掺量为12%时,能够完全补偿混凝土的收缩,使核心混凝土与钢管壁紧密结合,且承载力高、变形小,为最佳掺量。In order to study the shrinkage deformation of concrete filled steel tubular short column and shrinkage compensation, two shrinkage tests of concrete filled steel tube short columns and five different expansive agent dosage test of shrinkage-compensated were carried out. The experimental results indicate thatthe Ordinary concrete filled steel tube expands at the early stage under sealed condition, then shrinks due to hydration shrinkage, creep shrinkage and temperature contraction. The effect of radial shrinkage will delay the tightening force of the steel pipe to the concrete and affect the mechanical properties of the concrete-filled steel tube. When the dosage is 12%, the shrinkage of the concrete can be completely compensated, the core concrete is tightly combined with the steel pipe wall, the bearing capacity is high and the deformation is small, which is the best dosage.

关 键 词：钢管混凝土 补偿收缩 短柱 

分 类 号：TU394[建筑科学—结构工程]