大坝是国家的中啊哟基础设施之一。在中国乃至世界的大坝建设中,混凝土坝是使用*多、*广的一种坝型,其优点众多,但混凝土开裂严重影响了坝体的抗震性和耐久性,本书在三峡大坝的建造基础上,对“大体积混凝土裂缝方针段里分析研究”等课题实验和研究成果进行全面的总结,并提出了大坝混凝土防裂、控裂乃至建造无裂缝大坝的工程理论和工程实践的案例体系,对今后大坝工程建设技术进步具有重要的促进作用。
前言Preface l5PrefaceⅡ7Summary91Introduction。1 1.1 0verviewl 1.2 FractureExperiments of’l-hree Gorges Dam Concrete·2 1.2.1 Specimens2 1.2.2 Materialsand mix proportions3 1.2.3 Testprogram·3 1.2.4 Three—pointbending notched beam(TPB)tests5 1.2.5 Wedgesplitting(WS)test8 1.2.6 Directtension(DT)tests and fundamental mechanical performance tests2State—of-the—art Review on Concrete Softening Curvel4 2.1Introductionl4 2.2Determination Approach of the Tensile Softening Relationships(盯一W CUn,es)of Concrete.l4 2.2.1 Directtension test methodl4 2.2.2 J-Integralmethodl5 2.2.3 Inverseanalysis method-16 2.3 ShapeofSoftening Curve ofConcrete16 2.3.1 Linearshape softening curve ofconcretel6 2.3.2 Linearsoftening curve ofconcretel7 2.4Conclusionsl9References·.l93 Two Meth。ds for DeterminingSoftening Relati。nshipS Of Dam Concrete and Wet.screeIlil培Concrete。21 3.1Introduction21……