基于预应力度法的体外预应力加固桥梁配筋设计

体外预应力桥梁结构相对于传统的体内布筋预应力桥梁结构具有截面尺寸小、自重轻、预应力筋替换及维护管理方便、预应力损失小、施工工期短等优点,因此,体外预应力技术应用广泛,既可用于新建结构,也可用于原有结构的重建、加固及维修。实践证明,预应力度法是进行体外索配筋计算比较方便的方法。

Externior Prestress Reinforced Bridge Reinforcing Design Based upon Prestress Degree Method

Compared with conventional interior reinforcing prestress bridge structure,the exterior prestress bridge structure has the features of: Small sectional size,small dead weight,easy prestress reinforcement change and maintenance management,small prestress loss and short construction period,etc..Therefore,the exterior prestress technology is widely applied in newly constructed structures as well as re-building,reinforcement and maintenance of original structures.Structure of exterior prestress structure consists mainly exterior cable,steering block,anchor system and protective system,etc.,among which the reinforcing design for exterior cable is the key element.Practice shows the prestress degree method is a relative easy way to calculate exterior cable reinforcing.