HRB600级钢筋预制管高强混凝土柱偏压性能试验研究  

Experiment Study of Eccentric Compressive Property of High-strength Concrete Filled Precast High-strength Concrete Tube Column With HRB600 Steel Bars

作　　者：张建伟[1] 刘娇[1] 李翔宇[1] 曹万林[1] 申朝旭 ZHANG Jianwei;LIU Jiao;LI Xiangyu;CAO Wanlin;SHEN Zhaoxu(Key Laboratory of Urban Security and Disaster Engineering of China Ministry of Education,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学城市与工程安全减灾教育部重点实验室

出　　处：《北京工业大学学报》2019年第11期1041-1049,共9页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(51678009);北京市教育委员会科技重点资助项目(KZ201710005003)

摘　　要：为了解HRB600级钢筋预制管高强混凝土柱的偏心受压力学性能,进行3根截面尺寸为600 mm×600 mm的HRB600级钢筋预制管高强混凝土柱大偏压试验.分析预制管混凝土强度、有无钢纤维等设计变化参数对HRB600级钢筋预制管高强混凝土柱大偏压性能的影响规律,并与HRB600级钢筋高强混凝土偏心受压柱进行比较.研究结果表明,HRB600级钢筋预制管高强混凝土柱的破坏特征、荷载-挠度曲线、钢筋应变发展规律与HRB600级钢筋高强混凝土柱基本一致;提高预制管混凝土强度可提高柱的承载力;加入钢纤维不仅可提高柱的承载力,还可改善延性;与现浇混凝土柱相比,光滑结合面的预制管混凝土柱整体工作性能稍差,前期刚度退化较快,承载力较低;对于HRB600级钢筋预制管高强混凝土柱,可采用叠加的方法计算其偏心受压承载力.To investigate the eccentric compressive properties of high-strength concrete filled precast high-strength concrete tube column with HRB600 steel bars,three columns with cross-section dimensions of 600 mm × 600 mm were tested. The influence of design parameters such as the concrete strength of precast tube,and the content of steel fiber of the eccentric compression performance of high-strength concrete filled precast high-strength concrete tube column with HRB600 steel bars was discussed,comparing with the high-strength concrete column with HRB600 steel bars under eccentric compression.Results show that the failure characteristics,load-deflection curves,steel strain development law of highstrength concrete filled precast high-strength concrete tube columns with HRB600 steel bars are basically consistent with high-strength concrete column with HRB600 steel bars. With the increase of the concrete strength of the precast tube,the bearing capacity of column increases. Adding steel fiber improves the bearing capacity and ductility of the columns. Compared with the cast-in-place concrete columns,the precast concrete tube columns with smooth surface is slightly poorer in overall performance,the early stiffness is degraded faster,and the bearing capacity is lower. For high-strength concrete filled precast high-strength concrete tube columns with HRB600 steel bars,it is recommended to calculate the eccentric compression bearing capacity by using the method of superposition method.

关 键 词：HRB600级钢筋 钢纤维 高强混凝土预制管柱 偏压性能 单调荷载试验 

分 类 号：TU375[建筑科学—结构工程]