强调了混凝土结构耐久性设计的重要性、基本原理及定性设计方法。根据修订规范介绍了:耐久性环境类别;对混凝土材料的耐久性能要求;防止材料劣化的技术措施;延长设计使用年限的方法;使用期的检测、维护要求。可以帮助设计人员理解和执行修订规范的耐久性设计。 Emphasized the importance of the design of durability of concrete structures, basic principles and qualitative design methods. According to the revised specification introduced: durability of the environment category; durability of concrete materials performance requirements; to prevent material deterioration of the technical measures to extend the design life of the method; use of the testing and maintenance requirements. Can help designers understand and implement revised specifications for durability design.