Advanced Theory of Concrete Structures Chapter 1 Introduction Xianglin Gu College of Civil Engineering,Tongji University 目 土本工程学院 gxl@tongji.edu.cn COLLEGEOF CNVIL INGINELRIMXianglin Gu College of Civil Engineering, Tongji University gxl@tongji.edu.cn Chapter 1 Introduction Advanced Theory of Concrete Structures