在介绍拉压杆模型的概念和构形的基础上，讨论了混凝土梁桥中的常见D区和拉压杆模型的应用原理和构建准则，给出了应用该方法进行结构D区设计的一般步骤，作为示例，应用拉压杆模型方法并参照美国AASHTO LRFD(2004)规范，对一较典型的预应力齿板锚固区进行了配筋设计。阐述了拉压杆模型的起源、研究现状与进展，概括分析了当前国际上的研究动态和有待深化研究的方向。

The strut-and-tie model (STM) is an emerging procedure for the design of D-regions in concrete bridges. It is becoming one of the cutting edge research areas in structural engineering. Based on the concept and formation of strut-and-tie models, the typical D-regions existing in concrete bridges and their configurations are expounded. The criterion to develop appropriate strut-and-tie models and general procedures for dimensioning the D-region of structures are also discussed. According to AASHTO LRFD (2004), the application of the STM to design a typical anchorage blister is exemplified. At last, the origin and the state of the art are reviewed, and the current research areas are pointed out.

刘钊（1964－），男，安徽和县人，博士，东南大学教授，博导，主要从事桥梁工程研究