C80以上高强混凝土柱受力性能研究综述及建议

Review and suggestion of studies on mechanical behavior of high strength concrete column above C80

从钢筋强度、承载力、抗震性能以及在装配式结构中的应用等多方面对C80以上高强混凝土柱受力性能的研究情况进行了综述,主要结论和建议为:高强纵筋可增大柱的极限变形能力,高强箍筋可改善柱的延性;建议进行轴心受压和固定偏心距偏心受压试验,研究箍筋构造和承载力计算方法;国内针对柱的延性构造要求研究较多,建议对轴压比限值、配箍数量限值等研究结果进行整理和试验验证;建议结合混凝土构造及配筋形式、连接构造等进行预制柱的受力性能研究。

Based on the aspects of reinforcement strength,load carrying capacity,seismic behavior and application in precast structure,the studies on mechanical behavior of high strength concrete column above C80 and the application of high strength concrete in precast concrete structures have been reviewed.The main conclusions and suggestions are as follows.High strength longitudinal reinforcement can increase the limit deformation of column,and high strength stirrup can enhance the ductility of column.It is suggested to study the stirrup detailing and capacity calculation method by conducting axial compression and fixed eccentricity compression tests.Domestic studies focus more on ductility detailing requirement of column,it is suggested to summarize and verifying the existing research results of the limit values of axial compression ratio and stirrup quantity.It is suggested to study the mechanical behavior of precast column considering the detailing of concrete and reinforcement arrangement and connection joint.