内壁设置栓钉的大尺寸截面钢管混凝土柱界面黏结性能试验研究  

Experimental study of bond performance in large-sectional concrete-filled steel tubular columns with headed stud shear connectors

作　　者：任庆英[1,2] 赵庆宇[1] 刘文珽 陈志华[1] 杨剑[3] 彭飞[3] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]中国建筑设计院有限公司,北京100044 [3]中国建筑第三工程局有限公司,上海200129

出　　处：《建筑结构学报》2016年第12期105-113,共9页Journal of Building Structures

基　　金：国家自然科学基金项目(61272264)

摘　　要：对25个内壁设置栓钉的钢管混凝土柱大尺寸试件进行推出试验,以研究钢管混凝土柱内界面黏结强度及内壁栓钉受剪承载力。其中方钢管混凝土柱试件的截面尺寸均为600 mm×600 mm,圆钢管混凝土柱试件直径为600 mm,钢管壁厚分别为20、30 mm。设计主要参数为钢管混凝土柱的截面形状、填充混凝土的强度等级、钢管壁厚、钢管内壁粗糙程度以及内壁焊接栓钉的纵横向间距、栓钉直径和栓钉长度等。试验结果表明,工程应用低估了足尺钢管混凝土柱的界面黏结力与内壁设置栓钉的受剪承载力。依据试验结果提出了方钢管混凝土柱内栓钉受剪承载力的基本计算方法,以期为相关工程结构设计提供参考。Push-out tests were carried out on 25 full-scale square and circular concrete-filled steel tubulra （CFST） columns to research the concrete-steel bond strength and shear strength of headed studs. All the square CFST columns have the same section dimension of 600 mm × 600 mm and the circular CFST columns have the diameter of 600 mm. The wall thickness of the steel tubular are 20 mm or 30 mm. Various cross sections, concrete compressive strength, wall thicknesses of steel tubes, interface situations and shank diameters, vertical and horizontal spacing and heights of the headed studs were considered. The results indicate that the concrete-steel bond strength and the shear strength of headed studs in full-size CFST columns are underestimated in their application in the past. The fundamental calculation method of headed stud shear strength was presented. These experimental and analytical works can provide reference for designing headed studs in CFST columns.

关 键 词：钢管混凝土柱 栓钉 推出试验 界面黏结力 

分 类 号：TU398.903[建筑科学—结构工程]