钢管自密实混凝土黏结滑移性能试验研究  

Experimental study on the bond-slip between steel tube and self-compacting concrete

作　　者：黄晖[1] 叶燕华[1] 杜艳静[1] 孙仁楼[1] 

机构地区：[1]南京工业大学土木工程学院,江苏南京210009

出　　处：《混凝土》2010年第4期23-27,共5页Concrete

基　　金：江苏省自然科学基金资助(BK2006179)

摘　　要：为研究钢管自密实混凝土界面黏结滑移性能,基于膨胀剂掺量的变化进行了14根圆钢管自密实混凝土的反复推出试验,探讨分析自密实钢管混凝土的界面黏结状况以及膨胀剂掺量对试件黏结滑移性能的影响。试验结果表明:钢管自密实混凝土试件的受力过程划分为胶结段、滑移段、摩阻段三个受力阶段;适量掺入膨胀剂可以提高自密实钢管混凝土中钢管与混凝土的黏结滑移性能,但过量掺入膨胀剂,钢管壁将过早发生屈曲,降低钢管自密实混凝土的黏结滑移性能。In order to study the behavior of bond-slip between steel tube and self-compacting concrete.14 tests of self-compacting concrete filled steel tube with different expansive agent under the repeated push-out were carried out.The bond characteristics of interface between tube wall and concrete were discussed.The affect factors on the bond-slip properties of specimen with variety of expansive agent dosage were analyzed.The test results indicated that the process under loading was divided into three paragraphs including cementation,slip,as well as friction segment.The ap-propriate amount of expansive agent could increase the bond-slip properties of specimen.However,buckling of pipe wall will be occur and reduced on the behavior of bond-slip between steel tube and self-compacting concrete by excessive expansion agent.

关 键 词：低钢管自密实混凝土 推出试验 黏结滑移 荷载-滑移曲线 

分 类 号：TU528.59[建筑科学—建筑技术科学]