【摘要】 为进一步改善混凝土核心筒的抗震性能,本文提出了钢管混凝土叠合柱边框内藏钢桁架组合核心筒。进行了2个1/6缩尺的核心筒模型在低周反复荷载下的抗震性能试验研究,1个为钢管混凝土叠合柱边框组合核心筒,1个为钢管混凝土叠合柱边框内藏钢桁架组合核心筒。通过试验,对比分析了2个核心筒的承载力、延性、刚度及其衰减、滞回特性、耗能能力及破坏特征,给出了钢管混凝土叠合柱边框内藏钢桁架组合核心筒的承载力计算模型,计算结果与实测值符合较好。研究表明,钢管混凝土叠合柱边框内藏钢桁架组合核心筒与钢管混凝土叠合柱边框组合核心筒相比,其抗震性能明显提高。更多还原

【Abstract】 In order to further improve the seismic performance of concrete core walls,a new kind of RC composite core walls with steel tube-reinforced concrete columns and concealed steel trusses is proposed in this paper.Two 1/6 scale core wall specimens with the same tube-reinforced concrete columns,in which one with concealed steel trusses and another without,are tested under cyclic loading.The load-capacity,ductility,stiffness,deterioration process of stiffness,hysteresis characteristics,energy dissipation and damage characteristics of the two specimens are discussed.The mechanical model is provided for calculating the load-carrying capacity of the new RC composite care walls.The calculating results agreed well with the experimental ones.They show that the seismic performance of the RC composite core walls with tube-reinforced concrete columns could be improved by setting the concealed steel trusses in the walls.更多还原