钢-混凝土组合结构PBL剪力键疲劳损伤演化机理分析  

FATIGUE DAMAGE EVOLUTION MECHANISM OF PBL SHEAR CONNECTOR IN STEEL-CONCRETE COMPOSITE STRUCTURE

作　　者：卫星 肖林[1] 温宗意 WEI Xing;XIAO Lin;WEN Zongyi(Department of Bridge Eng.School of Civil Eng.,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学土木工程学院桥梁工程系,成都610031

出　　处：《钢结构》2018年第12期48-51,36,共5页Steel Construction

摘　　要：为研究反复荷载作用下钢-混凝土组合结构PBL剪力键的疲劳损伤演变及破坏机理,以开孔直径、钢板厚度和贯穿钢筋直径为影响参数,设计3因素2水平的正交试验模型,完成6组24个PBL剪力键模型疲劳试验。以相对滑移量为指标,研究了PBL剪力键的疲劳破坏机理,建立了疲劳荷载与疲劳寿命之间S-N关系曲线,讨论了PBL剪力键构造参数和疲劳荷载对其疲劳性能的影响。In order to investigate fatigue damage evolution and failure mechanism of PBL shear connectors in steel-concrete composite structure, taking the opening diameter, the thickness of steel plate, the diameter of steel bar as influence parameters, 24 push-out specimens in 6 group were designed and orthotropic test with 3 parameters in 2 levels were carried out. Based on the relative slip, the fatigue failure mechanism of PBL shear connector was studied. The S-N relationship between fatigue load and fatigue life was obtained. The influence of PBL shear connector design parameters and fatigue load on the fatigue performance was discussed.

关 键 词：钢-混凝土结构 PBL剪力键 疲劳性能 损伤演化 S-N曲线 

分 类 号：TU398.9[建筑科学—结构工程]