增大截面法加固高温损伤混凝土柱的试验研究  

EXPERIMENTAL INVESTIGATION OF STRENGTHENED REINFORCED CONCRETE COLUMNS AFTER EXPOSURE TO HIGH TEMPERATURE

作　　者：刘利先[1] 时旭东[1] 过镇海[1] 

机构地区：[1]清华大学土木工程系,北京100084

出　　处：《工程力学》2003年第5期18-23,共6页Engineering Mechanics

基　　金：国家自然科学基金资助项目(59978022)

摘　　要：通过对11根三面加温(800℃)后单面加固的钢筋混凝土小偏心受压试件进行加载试验,分析了不同偏心距、不同强度混凝土加固试件的受力性能,包括试件的承载力、变形规律及破坏特征。结果表明,此类构件的受力性能与普通混凝土加固柱有着显著的差别。试验结果可为分析或设计火灾后增大截面法加固的混凝土结构提供依据。An experimental program was carried out to study the behavior of reinforced concrete columns strengthened by enlarging section area only on the single surface of the original columns after exposure to high temperature up to 800°C. A total of 11 specimens strengthened with different strength grade concretes were cast and tested with different loading positions. The tested ultimate load capacity, deformation and failure modes of specimens are presented. These test results can be used for accurately analyzing and designing reinforced concrete columns strengthened by using section enlargement method after exposure to fire.

关 键 词：工程结构 加固 试验 增大截面法 混凝土柱 高温损伤 

分 类 号：TU318[建筑科学—结构工程] TU375.3