钢筋混凝土异形柱抗震性能的试验研究

Experimental Study on Aseismic Behavior of Reinforced Conctete Special-Shaped Columns

通过对4根钢筋混凝土T形和4根L形柱的试验研究,分析了试件的破坏形式、承载力、刚度、延性及耗能能力,得出试件滞回曲线具有明显不对称特征。深入研究了肢宽厚比、轴压比和柱的截面形式对试件各项性能的影响,得出肢宽厚对试件的承载能力、延性系数的影响最大,而三因素对试件耗能的影响程度随加载方向和加载阶段而变化。通过对试验结果分析,提出异形柱的单自由度体系恢复力模型,为进一步研究异形柱的抗震性能提供了依据。

In order to investigate the basic aseismic behavior of reinforced concrete special - shaped columns, four L- shaped columns and four T - shaped columns were tested in the laboratory. The column specimens were subjected to reversed lateral loads and unvarying axial loads. In this paper, the experimental procedures and a part of experimental results are described, which include the failure process,load - displacement interaction curves etc. The results show that the aseismic behavior of the columns specimens are strongly nonsymmetrical . By the method of orthogonal analysis, those effects on aseismic behavior of special - shaped columns were analyzed such as the ratio of limb length to width, the ratio of axial load to ultimate axial capacity of the section and the section shape. Based on one - way movement of special - shaped columns, the restoring force model was presented .