考虑温度效应的混凝土索塔锚固段应力分析

Analysis of Stress at Anchoring Zone of Concrete Tower Considering Temperature Effect

斜拉桥混凝土索塔锚固区域多采用环向预应力的锚固方式,该区域构造和受力十分复杂。为详细分析温度效应对该区域的影响,以杨泗港快速通道青菱段(八坦立交～丁字桥路)斜拉桥为例,采用实体有限元方法建立详细的索塔锚固区模型进行计算,得出考虑日照升温效应时的主拉应力控制设计的结论,为设计和施工提供依据,并可为类似桥梁结构提供参考。

The pre-stressed anchoring method is usually adopted in the anchorage zone of the concrete tower of cable-stayed bridge,which is very complicated about the structure and stress.In order to analyze the effect of temperature effect on the section in detail,taking the cable-stayed bridge of Qingling section of the Yangsigang Express Highway(Batang Interchange-Dingziqiao Road)as an example,the physical finite element method is used to establish a detailed model of the cable-stayed anchorage zone.The conclusions are drawn that the main tension stress control design is taken into account when considering the temperature increase effect of sunshine.The conclusions can provide some basis for design and construction and can further privde reference for similar bridge structures.