吉林兰旗松花江特大桥索塔锚固区空间应力分析

Analysis on the Spatial Stress of Pylon Anchorage Zone of the Super-long Bridge over Jilin Lanqi Songhua River

吉林兰旗松花江特大桥是一座单索面双塔预应力混凝土斜拉桥,索塔锚固区采用U形预应力钢束锚固形式。通过运用现代有限元方法,对该桥的索塔锚固区进行了空间应力分析,论证了该桥的索塔锚固区设计是安全的;同时也探讨了在强大斜拉索力作用下环向预应力锚固形式的受力特点,为同类型桥梁的索塔设计提供了重要的参考依据。

The super- long bridge over Jilin Lanqi Songhua River is a prestressed concrete cable- stayed bridge with a single cable plane and two pylons. The pylon anchorage zone is provided with u- shaped prestressed steel tendon manner. Using the modern finite element method,it analyzed the spatial stress of the bridge＇s pylon anchorage zone,which proves the design of pylon anchorage zone for this bridge is safe. Besides,it contains a discussion on the stressing feature of the circumferential prestress anchorage under the strong cable force,which provides a significant basis for the similar bridge pylon design.