钢-混凝土组合连续梁桥体外预应力设计

Design of Externally Prestressed Cables Steel-concrete Composite Continuous Beam

结合深圳市机场南路新建工程50+82+50m钢-混凝土组合连续梁桥的设计实例,对体外预应力钢束束形布置、张拉控制应力、自振特性、转向装置、耐久性设计等方面进行了分析研究。研究结论认为在此类设计中,应重点考虑锚固区和转向装置、体外索振动和防腐要求等方面的问题。

Combining the 50＋82＋50 m steel-concrete composite continuous beam bridge located in the south road of the airport in Shenzhen,the paper researched the layout of externally prestressed cables,tendon stress,self-vibration characteristic,deviators and durability.The conclusion shows that we should pay attention to three main problems of anchorage zone and deviators,self-vibration characteristic and anticorrosive requirements etc.