预应力混凝土连续梁锚块受力体系研究及配筋优化

Research on theLoad Effect Mechanism of Anchor block of Prestressed Continuous Concrete Beam with Reinforcement Optimization

预应力技术已在桥梁建设中得到广泛应用,随之而来的预应力锚具下的病害问题日益突出,影响着桥梁结构的安全性和耐久性。锚具的病害问题已经过锚具生产厂家的不断努力得到了较好的解决,然而作为桥梁结构自身的锚块构造却研究较少。因此对锚块的受力体系进行深入分析研究,并根据分析结果对锚块钢筋构造进行优化,以减少锚块混凝土开裂的问题出现。

The prestressing technology has been widely used in bridge construction.Meanwhile,more prestressed anchorage disease problems are increasingly outstanding,which affecting the safety and durability of the bridge.Anchorage disease problem has been solved through the continuous efforts of anchor manufacturers,while the anchor block itself as the one part of the bridge structure has been paid less attention.In this paper,the stress of the anchor block load effect mechanism was studied,and according to the analysis results,the layout of the anchor block reinforcement was optimized to reduce the cracks of anchor block.