论文部分内容阅读
随着高强度钢筋的推广使用,HRB500钢筋将被广泛应用于柱箍筋,以提高柱的强度和延性。根据已有的受约束混凝土的本构关系,对使用HRB500高强钢筋作为箍筋的矩形截面和圆形截面混凝土柱的轴压承载力进行理论分析,提出相关承载力的计算方法。最后,将计算结果与用现行规范计算得到的承载力进行对比,得出使用HRB500箍筋后,混凝土结构柱承载力的提高是明显的。但应对现行规范在箍筋间距、保护层厚度的取值等方面应适当加以调整,以保证高强度箍筋的作用得以很好发挥。
With the promotion of high strength steel, HRB500 steel bar will be widely used in column stirrups, in order to improve the strength and ductility of the column. According to the existing constitutive relationship of the confined concrete, the theoretical analysis on the axial compressive bearing capacity of rectangular section and circular section concrete columns with HRB500 high strength steel bars as stirrup is proposed, and the calculation method of relevant bearing capacity is put forward. Finally, comparing the calculated result with the bearing capacity calculated by the current codes, it is concluded that the increase of bearing capacity of concrete structural columns after using HRB500 stirrup is obvious. However, the current codes should be properly adjusted in terms of stirrup spacing, the thickness of the protective layer, etc. to ensure that the role of high strength stirrups can be well played.