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中文摘要：
采用拉应变可达3%~5%、极限受拉破坏时平均裂缝间距和平均裂缝宽度仅为1mm~2mm和60μm~100μm的工程用水泥基复合材料（engineered cementitious composite,ECC）替换普通钢筋混凝土梁受拉区的部分混凝土材料形成ECC-RC复合梁,可提高构件的承载能力、延性和耐久性。文章系统介绍了工程水泥基复合材料的力学性能及其与钢筋粘结的本构关系,并总结了ECC-RC复合梁的弯曲抗裂和正截面承载力的计算理论,以及复合梁界限条件、变形能力、延性和配筋率对ECC梁弯曲性能的影响,可供工程设计人员参考。
英文摘要：
As a new fiber reinforced cementitious material, engineered cementitious composite（ECC） possesses remarkable tensile strain capacity of up to 3%-5% and a unique crack dispersion capacity with the average crack width of 60μm-100μm and average crack spacing of merely 1mm-2mm. By using ECC take place ordinary reinforced concrete beams in tension zone can form ECC-RC composite beam which can improve the bearing capacity, ductility and durability of components. The mechanical properties of engineered cementitious composites and its constitutive bond behaviors with steel bars were introduced, the calculate theory of cracking capacity and bearing capacity of ECC-RC composite beam were summarizes, and boundary conditions of the composite beam, deformation capacity, ductility and reinforcement rate effect on flexural behavior of ECC beam were also introduced. So, it can used for reference in engineering design.
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