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为了充分研究钢筋与混凝土之间的黏结长度对钢筋混凝土构件力学性能的影响,通过理论分析,推导出部分无黏结钢筋混凝土构件承载力计算公式,并在此基础上,使用理论公式和有限元数值模拟分析方法进行了分析与比对。结果表明,钢筋与混凝土之间有无黏结对钢筋混凝土构件的极限承载力无影响;随着无黏结长度的增长,构件的整体变形量增大、开裂区减小和黏结界面易出现应力集中现象。
In order to fully study the influence of bond length between reinforcing bars and concrete on the mechanical properties of reinforced concrete members, the formula for calculating the bearing capacity of some unbonded reinforced concrete members is deduced through theoretical analysis. On the basis of this, theoretical formulas and finite element numerical Simulation analysis methods were analyzed and compared. The results show that there is no effect on the ultimate bearing capacity of the reinforced concrete members with or without bond between the reinforcing bars and the concrete. With the increase of the unbonded length, the overall deformation of the members increases, and the cracking zone and the bonding interface tend to stress concentration .