预应力混凝土梁桥的齿板锚固区，由于存在着几何形体上的突变，集中锚固力的作用以及预应力钢束局部弯曲引起的径向力作用，易产生开裂甚至剥落破坏，因此齿板锚固区的抗裂配筋设计十分重要。以7种典型局部作用效应刻画齿板锚固区内拉应力的集中分布特征，并在此基础上形成了齿板锚固区拉压杆模型，初步形成预应力混凝土梁桥的抗裂钢筋设计新方法。

The tooth plate anchorage zones of the prestressed concrete girder bridge bear the anchorage forces and radial forces of prestressed bars and are easy to form cracks or break due to discontinuities in geometry. So the designs of anti-crack bars are critically important. Seven classical tension stress distributions are described in this paper and a model based on strut-and-tie bar theory is constructed to form a novel design method for the prestressed bar design in the anchorage plates.

张向群（1977－），男，江苏盐城市人，工程师，主要研究方向为大跨径桥梁工程施工