【摘要】 为研究细观结构因素(骨料形状、级配)和构件自身属性(水平钢筋直径、混凝土强度等级)对混合配筋混凝土剪力墙抗震性能的影响规律，通过细观尺度数值模拟方法对高宽比为1.0、轴压比为0.1的一系列剪力墙数值模型进行模拟，并通过与试验数据对比验证了细观模型的有效性。结果表明：多边形骨料使C30混凝土剪力墙抗剪承载力提高了5.32%,但延性系数和耗能能力分别降低8.46%和2.67%;随着混凝土强度增加至C70,剪力墙抗剪承载力提高幅度衰减至0.76%;三级配骨料通过优化颗粒堆积，使剪力墙抗剪承载力和耗能分别提高5.08%和16.88%,但初始刚度降低9.7%;水平钢筋直径从10 mm增至20 mm时，剪力墙抗剪承载力线性提升11.7%,并延缓刚度退化速率，但促进裂缝扩展充分性；碳纤维增强复合材料(CFRP)筋布置在下侧相比布置在中间位置，会使裂缝发展更为规则；研究结果为混合配筋混凝土剪力墙的细观设计及抗震性能优化提供了量化依据。更多还原

【Abstract】 In order to investigate the influence of meso-structural factors(aggregate shape, gradation) and component properties(horizontal reinforcement diameter, concrete strength grade) on the seismic performance of hybrid-reinforced concrete(RC) shear walls, a series of shear wall numerical models with aspect ratio of 1.0 and axial compression ratio of 0.1 were simulated by meso-scale numerical simulation method, and the validity of the meso-scale model was verified by comparing with the experimental data. The results show that the polygonal aggregate increases the shear capacity of C30 concrete shear wall by 5.32%, but the ductility coefficient and energy dissipation capacity decrease by 8.46% and 2.67% respectively. With the increase of concrete strength to C70, the increase of shear bearing capacity of shear wall decreases to 0.76%. By optimizing the accumulation of particles, the shear capacity and energy consumption of the shear wall are increased by 5.08% and 16.88%, respectively, but the initial stiffness is reduced by 9.7%. When the diameter of horizontal reinforcement increases from 10 mm to 20 mm, the shear capacity of shear wall increases linearly by 11.7%, and the rate of stiffness degradation is delayed, but the adequacy of crack propagation is promoted. The arrangement of carbon fiber-reinforced polymer(CFRP) bars on the lower side will make the crack development more regular than that in the middle position. The research results provide a quantitative basis for the meso-scopic design and seismic performance optimization of hybrid reinforced concrete shear walls.更多还原