Lu Liang, Suliman Musaab, Xia Wanqiu
Department of Disaster Mitigation for Structures, Tongji University, 1239 Siping Road, Shanghai 200092, China.
Materials (Basel). 2024 Nov 26;17(23):5786. doi: 10.3390/ma17235786.
This study investigates the effects of integrating carbon nanofibers (CNF) into concrete to enhance the mechanical properties and reversed cyclic behavior of framed shear walls, addressing the need for improved seismic performance and durability. Despite the known benefits of CNF in improving concrete properties and enabling structural health monitoring, its application in framed shear walls has been limited. Through the design and testing of nineteen CNFC formulations, this research established a constitutive relationship allowing the Cyclic Softened Membrane Model (CSMM) to be applied to CNFC. Finite element analysis of shear walls under reversed cyclic loading revealed notable improvements in shear force capacity and ductility when CNF was incorporated. These findings highlight the dual role of CNFC in advancing both material performance and structural resilience, offering a significant contribution to the fields of material science and earthquake engineering.
本研究调查了将碳纳米纤维（CNF）掺入混凝土中对框架剪力墙力学性能和反复循环性能的影响，以满足提高抗震性能和耐久性的需求。尽管已知CNF在改善混凝土性能和实现结构健康监测方面具有诸多益处，但其在框架剪力墙中的应用一直有限。通过对19种CNFC配方的设计和测试，本研究建立了一种本构关系，使得循环软化膜模型（CSMM）能够应用于CNFC。在反复循环加载下对剪力墙进行的有限元分析表明，掺入CNF后，剪力墙的抗剪承载力和延性有显著提高。这些发现突出了CNFC在提升材料性能和结构恢复力方面的双重作用，为材料科学和地震工程领域做出了重要贡献。
