体外预应力砼桥梁锚固结构分析及配筋研究

Analysis on Structure of Anchorages of External Prestressing Concrete Bridge and the Stress Distribution Study

锚固结构是体外预应力结构中最关键的结构之一,需对其进行细致详尽的分析计算,以保证体外预应力混 凝土结构的安全和可靠。拉压杆模型方法(strut-and-tie modle)近年来在国内外都受到了相当的关注。本论文运用 有限元技术结合拉压杆模型方法时锚固结构的受力特性进行详细的分析和配筋计算。通过分别时锚固结构力流传 递形式及应力分布情况的分析,总结了相应锚固结构的受力特点并给出相应的计算方法和拉压杆配筋计算模型,并 提出了相关的设计建议。

Anchorages are not only the most important part of external prestressing structures but also very complex part in construction and structural behavior. Strut - and - tie modle has braught much attentions worldwide in recent years. It can be applied to any part of the concrete structure and it is a design theory that can be applied to complicated reinforced concrete structures. The performances of anchorages were studied in detail by combining the finite element theory and strut - and - tie modle. By analyzing of the load path and stress distribution of anchorages, this paper summarized the structural behavior, calculated method and strut - and - tie modle and presented some design advices.