增强新旧混凝土结合的新方法研究

Method for enhancing the combination of the young and old concrete

针对既有混凝土结构的维修、加固中涉及的新旧混凝土结合不良问题提出了一种改善结合的新方法—机械连接方法。讨论了三种新旧混凝土结合设计模型,并定性确定出剪力—位移曲线;总结了影响新旧混凝土结合的主要因素;探讨了机械连接件的形式和工作机理;介绍了两种机械连接件的极限抗拉强度公式。

For the bad combination of the young and old concrete, this paper brings forward a new method about mamtammg and reinforcement of concrete structure--mechanical joint.Three combination models of young and old concrete were discussed, sodid relative force---displacement curves： the main effect factors of combination of the young and old concrete were summarized： the form and work mechanism of mechanical joint element were probed into. At last,two formulas of limit tension strength of mechanical joint elements were introduced.