Cao Lei, Li Ziyuan, Li Yuxuan, Li Ke, Jing Denghu, Qi Ya, Geng Yaohui
School of Civil Engineering and Transportation Engineering, Yellow River Conservancy Technical Institute, Kaifeng 475000, China.
School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China.
Materials (Basel). 2024 Dec 4;17(23):5943. doi: 10.3390/ma17235943.
This research investigates the flexural performance of slabs reinforced with high-strength steel-strand mesh (HSSM) and engineered cementitious composites (ECCs). By employing finite element analysis (FEA) and theoretical modeling, this study aims to deepen the understanding of how these materials behave under bending stresses. A finite element model was developed to simulate the nonlinear behavior of ECCs during bending, considering critical elements such as tensile and compressive damage, as well as bond-slip interactions between the steel strands and the ECCs. Furthermore, a theoretical model was created to predict the load-bearing capacity of HSSM-reinforced ECC slabs, incorporating variables like reinforcement ratios, slab dimensions, and material characteristics. The findings reveal that increasing the reinforcement ratio substantially enhances both flexural stiffness and load-bearing capacity while reducing deflection. Comparisons between the FEA results, the theoretical forecasts, and the experimental observations show close alignment, validating the proposed models. This work provides important insights for optimizing the design of HSSM-reinforced ECC slabs, highlighting their potential improvements in structural systems that demand high flexural performance.
本研究调查了用高强度钢绞线网（HSSM）和工程水泥基复合材料（ECC）增强的板的抗弯性能。通过采用有限元分析（FEA）和理论建模，本研究旨在加深对这些材料在弯曲应力下行为的理解。开发了一个有限元模型来模拟ECC在弯曲过程中的非线性行为，考虑了诸如拉伸和压缩损伤等关键因素，以及钢绞线与ECC之间的粘结滑移相互作用。此外，创建了一个理论模型来预测HSSM增强ECC板的承载能力，纳入了诸如配筋率、板尺寸和材料特性等变量。研究结果表明，增加配筋率可显著提高抗弯刚度和承载能力，同时减少挠度。有限元分析结果、理论预测和实验观察之间的比较显示出密切的一致性，验证了所提出的模型。这项工作为优化HSSM增强ECC板的设计提供了重要见解，突出了它们在要求高抗弯性能的结构系统中的潜在改进。
