FRP约束ECC核心轴压力学性能数值仿真分析

Research on Numerical Simulation Analysis of the Axial Compression Mechanical Properties of the FRP-Confined ECC Core

摘要: 本文提出了一种由FRP管、中心筋和ECC材料组合形成的纵向受力组件(FRP约束ECC核心，FCEC)，通过数值模拟研究了其轴压力学性能。数值模拟结果显示：以D50T3-R10为基准试件，在中心筋倾斜角度处于5˚至8˚范围时，对结构承载力的影响较为有限，承载力降低幅度在1.8%至4.47%之间；当中心筋直径从10 mm增大至14 mm~18 mm时，结构承载力可提高13.5%；而将FRP管厚度由2 mm增大至3 mm~5 mm，承载力提升幅度可达23.6%至63.2%。

Abstract: This thesis proposes a longitudinal load-bearing component (FRP-confined ECC core, FCEC) formed by the combination of FRP pipes, central reinforcement, and ECC materials, and studies its axial compression mechanical properties through numerical simulation. The numerical simulation results show that: taking the D50T3-R10 as the reference specimen, when the inclination angle of the central reinforcement is in the range of 5˚ to 8˚, the influence on the structural bearing capacity is relatively limited, and the reduction range of the bearing capacity is between 1.8% and 4.47%. When the diameter of the central reinforcement is increased from 10 mm to 14 mm~18 mm, the structural bearing capacity can be increased by 13.5%. Moreover, when the thickness of the FRP pipe is increased from 2 mm to 3 mm~5 mm, the increase range of the bearing capacity can reach 23.6% to 63.2%.