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通过7片外置薄钢板再生混合墙的拟静力试验研究,分析了废弃混凝土混合比、钢板厚度、轴压比、横隔板间距、高宽比等参数对试件抗震性能的影响。基于新、旧混凝土的组合强度,对试件的水平承载力进行了近似计算分析,并在总用钢量基本一致的情况下,与钢筋混凝土墙的水平承载力进行对比。研究结果表明:废弃混凝土混合比在0～33%之间变化对试件的初始刚度、水平承载力、破坏位移角、耗能能力、滞回曲线形状等影响有限;外置薄钢板再生混合墙的设计轴压比不宜超过0.35;在混合墙厚度与钢板厚度之比高达120的情况下,外置薄钢板再生混合墙具有较稳定的滞回性能和变形能力,其破坏位移角满足现行抗震规范要求;外置薄钢板再生混合墙具有与钢筋混凝土墙相当甚至略高的耗能能力;在总用钢量基本一致的情况下,外置薄钢板再生混合墙具有与钢筋混凝土墙基本相当的水平承载力。
Based on the quasi-static tests of seven externally mixed steel sheets, the influence of parameters such as mixing ratio of concrete, thickness of steel sheet, axial compression ratio, spacing of spacers and aspect ratio on the seismic performance of specimens was analyzed. Based on the combined strength of new and old concrete, the horizontal bearing capacity of the specimen was calculated and analyzed. Compared with the horizontal bearing capacity of the reinforced concrete wall when the total amount of steel was basically the same, the horizontal bearing capacity was compared. The results show that the influence of mixing ratio of waste concrete between 0 and 33% on the initial stiffness, horizontal bearing capacity, displacement angle, energy dissipation capacity and shape of hysteresis curve of the concrete is limited. Of the design axial compression ratio should not exceed 0.35; in the mixed wall thickness and the thickness of the steel plate up to 120 cases, the external thin steel plate recycled mixed wall has a more stable hysteresis and deformation capacity, the displacement angle to meet the current seismic code Requirements; external thin steel recycling mixed wall with the reinforced concrete wall is quite high or even slightly higher energy consumption; in the case of the total amount of steel is basically the case, the external thin steel plate with recycled concrete wall and reinforced concrete walls are basically the same level Carrying capacity.