高强度三维钢丝网加强混凝土抗侵彻机理研究

INVESTIGATION ON PENETRATION RESISTANCE MECHANISM OF 3D-HSWM REINFORCED CONCRETE

  • 摘要: 高强度三维钢丝网加强混凝土采用三维编织的高强度钢丝网替代传统中低强度平面钢丝网,具有良好的延性和能量吸收能力,显示出作为耗能结构的应用潜力。为进一步拓展其应用场景,本研究以未加强混凝土和中低强度平面钢丝网加强混凝土为对照进行高速冲击试验,结果表明:与中低强度平面钢丝网相比,高强度三维钢丝网的加入使侵彻深度降低14%~16%,结合理论分析和数值模拟,本文从对抗剪强度的提升角度初步揭示了其性能增强机制:增强效应来源于三维编织结构效应与材料强度提升效应的协同耦合,且结构效应的贡献更为显著(约7%)。其中,单层编织节点通过拉伸咬合实现面内能量分散,多层编织网格对核心混凝土形成环向约束,显著提升了混凝土的强度,从而提升了整体的抗侵彻性能。

     

    Abstract: Three-dimensional high-strength steel wire mesh-reinforced concrete replaces traditional low-to-medium-strength planar steel wire meshes with three-dimensionally woven high-strength steel wire meshes. It possesses excellent ductility and energy absorption capacity, demonstrating a potential for applications as an energy-dissipating structure. To further explore its application scenarios, this study conducted high-speed impact tests using unreinforced concrete and concrete reinforced with low-to-medium-strength planar wire meshes as controls. The investigation results indicate that, compared to low-to-medium-strength planar wire meshes, the addition of high-strength three-dimensional wire meshes reduces the penetration depth by 14%-16%. Combining theoretical analyses and numerical simulations, this paper preliminarily reveals the performance enhancement mechanism from the perspective of improved shear strength: the reinforcement effect stems from the synergistic coupling of the three-dimensional woven structure effect and the material strength enhancement effect, with the structural effect contributing more significantly (approximately 7%). Specifically, single-layer woven nodes disperse in-plane energy through the tensile interlocking, while multi-layer woven meshes provide a circumferential confinement to the core concrete, significantly enhancing the concrete’s strength and thereby improving the overall penetration resistance.

     

/

返回文章
返回