装配式先张法预应力混凝土简支工字梁研究与设计

Study and Design of Assembled Pre-tensioned Pre-stressed Concrete Simple Supported I-beam

空心板梁桥近些年来暴露出一些问题，如横向铰缝破坏、支点处斜裂缝多、支座易脱空等，重载交通下小跨径桥梁新的结构形式亟待研究解决。上海市南六公路（S1～S32）改建工程上部结构采用装配式先张法预应力混凝土工字梁，依托该工程对工字梁进行了深人的研究，有关经验可供相关专业人员参考。

In recent years,some problems such as horizontal hinge joint destruction,more inclined cracks at the fulcrum and easy bearing separation have appeared in hollow slab beam bridge.The new structure of small span bridge under heavy traffic should be studied and solved urgently.The assembled pre-tensioned pre-stressed concrete I-beam is used for the upper structure of Shanghai Nanliu Highway(S1~S32)Reconstruction Project.The article further studies the I-beam by this project.The relative experience can be referred for the similar projects.