作　　者： ; ; ;

机构地区： 广州大学土木工程学院

出　　处： 《钢结构》 2011年第11期1-7,共7页

摘　　要： 采用ABAQUS有限元软件分别对开槽核心方钢管和三重方钢管防屈曲耗能支撑进行屈曲分析和滞回性能分析,研究不同宽厚比对其性能的影响规律。结果表明:宽厚比大小对开槽方钢管屈曲模态和三重方钢管防屈曲耗能支撑的性能有较大影响;方钢管核心单元1、2阶屈曲模态为局部屈曲时,三重方钢管防屈曲耗能支撑的最大拉压承载力提高较之方钢管核心单元1、2阶屈曲模态为整体屈曲时大;宽厚比为11.4～16.0时,三重方钢管防屈曲耗能支撑具有合理的弹塑性过渡段,滞回曲线饱满对称,具有稳定的滞回性能。设计时,建议宽厚比取12.0～16.0为宜。 Using ABAQUS to study the buckling mode of notch-typed core square steel tube and the hysteretic performance of triple square steel tubular buckling-restrained braces （TSST-BRB） under different width-thickness ratio. The analysis results indicate that the width-thickness ratio has great influence on the buckling mode of notch- typed core square steel tube and the seismic performance of the TSST-BRB; the maximal tensile and compressive capacity of TSST-BRB is increased more with the first and two buckling mode of core element are local buckle than that of overall buckle. When the width-thickness ratio is between 11.4 and 16.0, the braces have reasonable elastic- plastic transition range, full and symmetrical hysteretic curve, and take on excellent hysteretic performance. It is recommended that the width-thickness ratio of core square steel should be taken 12.0~16.0 when design the TSST- BRB.

关 键 词： 方钢管 宽厚比 局部屈曲 滞回曲线 耗能系数 等效黏滞阻尼比

领　　域： [建筑科学]