作　　者： ; (高剑平）; (吴永根）;

机构地区： 教育部

出　　处： 《世界地震工程》 2012年第3期34-42,共9页

摘　　要： 近年来,薄壁钢管混凝土柱由于其良好的力学性能和施工性能在各类建筑结构和桥梁上得到了广泛应用,但震害表明,普通薄壁钢管混凝土柱抗局部屈曲能力和屈曲后抗震性能较差。提出了一种薄壁波纹钢管混凝土柱,为了初步探索其抗震性能,以轴压比和截面形式为主要参数,进行了2根薄壁波纹钢管混凝土柱和2根普通薄壁钢管混凝土柱低周反复加载试验研究。主要结论如下:在轴压比相同的情况下,薄壁波纹钢管混凝土柱的滞回曲线明显要比其它两种截面形式的饱满;在相同位移时,薄壁波纹钢管混凝土柱的耗能能力明显好于方形和圆形的。三种截面形式的延性较接近且延性系数均超过3,且强度退化和刚度退化趋势和程度基本一致。综合分析,薄壁波纹钢管混凝土柱抗震性能较之圆、方形薄壁钢管混凝土柱的相当或稍好。研究结果可供城市高架桥的分析与设计参考。 In recent years, thin-walled concrete-filled steel tube column ha been widely used in many types of building structures and bridges, owing to its good mechanical properties and construction performance. However, the local buckling capacity and post-buckling seismic capacity of common thin-walled concrete-filled steel tube col- umn are poor. A new-style thin-walled corrugated concrete-filled steel tube column was proposed. A low cyclic loading test was conducted to study its seismic performance with axial-compression ratio and section form as the main parameters. The main conclusions are as follows ： the hysteresis loops of thin-walled corrugated steel concrete column are fuller than those of the other two section forms under the same axial-compression ratio. The dissipation energy capacity of thin-walled corrugated steel concrete column is better than that of square and circle under the same displacement condition. The ductility coefficients of the three section forms are close and all exceed three. The law and degree of strength degradation and stiffness degradation are almost the same. In general, the seismic performance of thin-walled corrugated steel concrete column is almost the same or even better than that of circle and square thin-walled steel concrete column. The research results could give a reference to analysis and design of urban elevated viaducts.

关 键 词： 薄壁波纹钢管混凝土柱 滞回性能 骨架曲线 耗能 延性 承载力

领　　域： [建筑科学]