In this paper, three-point flexural testing was used to study the flexural properties of polyvinyl alcohol fiber-reinforced engineered cementitious composites (PVA-ECC) and carbon textile-reinforced concrete (CTRC)-layered composite plates. Taking the layer thickness of the two materials and the material type of the tensile plate surface as factors, eight research conditions were established. The effects of these factors on the cracking mode, cracking load, ultimate load, deflection, and toughness of CTRC-ECC plates were discussed. The test results show that the ultimate load and toughness of the specimen with CTRC as the tensile face are significantly larger than those of the specimen with ECC as the tensile face. C–P12–C1 has an ultimate load of 2.04 times that of P–P12–C1, C–P9–C2 has an ultimate load of 1.19 times that of P–P9–C2, and C–P6–C3 has an ultimate load of 1.30 times that of P–P6–C3. The greater the thickness of the CTRC layer is, the greater the ultimate load and toughness of the CTRC-ECC layered composite plate are. The ultimate loads of P–P12–C1, P–P9–C2, and P–P6–C3 are 39%, 157%, and 369% higher than that of P–P18–C0, respectively. When the thickness ratio of the CTRC layer to the ECC layer is two, the composite plate shows much higher toughness. The formulas were derived to calculate the flexural strength of the layered composite plate with CTRC as the tensile face, which can be used to guide the design of flexural members of layered composites.

本文采用三点弯曲试验研究了聚乙烯醇纤维增强工程胶凝复合材料的弯曲性能。(PVA-ECC) 和碳纤维增强混凝土 (CTRC) 层状复合板。以两种材料的层厚和拉伸板表面的材料类型为因素，建立了8个研究条件。讨论了这些因素对CTRC-ECC板的开裂方式、开裂载荷、极限载荷、挠度和韧性的影响。试验结果表明，以CTRC为拉伸面的试件的极限载荷和韧性明显大于以ECC为拉伸面的试件。C-P12-C1的极限载荷是P-P12-C1的2.04倍，C-P9-C2的极限载荷是P-P9-C2的1.19倍，C-P6-C3的极限载荷是是 P-P6-C3 的 1.30 倍。CTRC层的厚度越大，CTRC-ECC层状复合板的极限载荷和韧性越大。P-P12-C1、P-P9-C2和P-P6-C3的极限载荷分别比P-P18-C0高39%、157%和369%。当。。。的时候CTRC层与ECC层的厚度比为2，复合板表现出更高的韧性。推导出以CTRC为受拉面的层状复合板抗弯强度计算公式，可用于指导层状复合材料受弯构件的设计。