下补新老混凝土粘结界面完全劣化梁的工作性能  

BEHAVIOR OF LOWER-PART REPAIRED REINFORCED CONCRETE BEAMS WITH COMPLETE BOND DETERIORATING BETWEEN NEW TO OLD CONCRETE INTERFACE

作　　者：刘运明[1] 熊光晶[1] 谢慧才[1] 

机构地区：[1]汕头大学

出　　处：《土木工程学报》2000年第2期107-110,共4页China Civil Engineering Journal

基　　金：攀登计划(B)项目!"重大土木与水利工程安全性与耐久性的基础研究"第5.2子项"新老混凝土粘结机理和测试方法研究"资助

摘　　要：对下补新老混凝土粘结界面完全劣化简支梁梁行的试验研究结果表明：由于粘结界面的滑移，导致了这种梁的承载能力有所降低，延性显著下降，短期与长期挠度明显增加。并研究了这种梁的工作机理。An experimental research into the flexural behavior of lower-part repaired reinforced concrete beams with special attention on complete bond deteriorating between new to old concrete interface has bo carried out. Short term test results show that the new to old concrete interface slip caused by bond deterioraing leads to a slight decrease of loadillg capaeity and a significant decrease of ductility of the beams. Long term loading test results indicate tha the most part of the increase of deflection caused by complete bend deteriorating between new to old concrete interface is finished in the first day of loading. The woting mecha nism of this kind of repaital heams has been explalned as well. It is suggested that the defects located at the lower part of beams should be repaired in time and the existing repair metheds should be improved specially for the repairing of members with defects at their lower part.

关 键 词：新老混凝土粘结 完全劣化界面 界面滑移 

分 类 号：TU370.2[建筑科学—结构工程]