Experimental on bending performance of engineered cementitious composites reinforced by high-strength stainless steel wire mesh

• 1、School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China
• 2、JZFZ Architectural Design Co., Ltd, Zhengzhou Branch, Zhengzhou 450003, China

Abstract：In order to study the bending performance of engineered cementitious composites (ECC) reinforced by high strength stainless steel wire strand (HSSSWS) meshes, the four-point bending tests were carried out on 8 HSSSWS mesh reinforced ECC thin plates specimens designed in two groups, which considered two factors including the reinforcement ratio of longitudinal HSSSWSs and ECC strength (combination ratio). The results show that with an increase in the reinforcement ratio of longitudinal HSSSWSs, the cracking load is basically unchanged, but the peak load increased significantly, and the peak displacement decreased，that is the ductility is reduced. In addition, the reasonable reinforcement ratio of longitudinal HSSSWSs should be less than 0.48%. The cracking load and peak load of the HSSSWS mesh reinforced ECC bending specimen increased as the ECC strength increased. After ECC cracking, the steel wire strands and the ECC in the tensile zone were tensioned together. When the applied load reached 80% of the peak load, the maximum crack width at the bottom was only 0.08mm, which is far less than the crack width of the serviceability limit states of concrete structures. At peak load, the maximum crack width did not exceed 0.55 mm, and the compressive strain of the ECC in the compression zone reached 0.01. When ECC is crushed, the maximum deflection in the mid-span reached 1/15 of the span. These phenomena shows that the HSSSWS mesh reinforced ECC studied in this paper has good crack resistance and ductility.

Keywords： Structural Engineering high-strength stainless steel stranded wire mesh reinforced ECC composite bending test experimental research bending performance