开斜槽钢板剪力墙的滞回性能

为寻求适用于自复位结构且具有显著捏缩滞回特征抗侧力部件,对单向斜槽钢板剪力墙(steel plate shear wall with inclined slots,IS-SPSW)、双向IS-SPSW及传统薄钢板剪力墙(traditional thin steel plate shear wall,TT-SPSW)的滞回性能进行了研究。分析了剪力墙板高厚比、跨高比参数对IS-SPSW滞回性能、水平承载力、抗侧刚度、耗能能力的影响,对比了双向IS-SPSW与TT-SPSW滞回性能的差异。分析结果表明,随剪力墙板高厚比的增加,单向IS-SPSW的水平承载力、抗侧刚度、耗能能力呈降低趋势。剪力墙板跨高比对单向IS-SPSW的水平承载力影响较大,对其滞回曲线、抗侧刚度及耗能能力几乎无影响。与TT-SPSW相比,对称布置的双向IS-SPSW具有显著捏缩的滞回特征和较高的水平承载力,非常适合作为自复位结构的主要抗侧力构件,可降低对复位部件用量的需求。

Hysteretic Behavior of Steel Plate Shear Wall with Inclined Slots

To propose a lateral-resisting component with pinching hysteretic curve and used in self-centering structure,three types of steel plate shear wall(SPSW)are investigated,including steel plate shear wall with one-directional inclined slots(one-directional ISSPSW),steel plate shear wall with bidirectional inclined slots(bidirectional IS-SPSW)and traditional thin steel plate shear wall(TT-SPSW).The effects of important design parameters including height-to-thickness and span-to-height ratio on the hysteretic behavior,lateral bearing capacity,lateral stiffness,and energy dissipation capacity of IS-SPSWs are analyzed.Comparison of hysteretic behavior between bidirectional IS-SPSW and TT-SPSW has been carried out.The analytical results show that with the increase of height-to-thickness ratio,the lateral bearing capacity,lateral stiffness and energy dissipation capacity of one-directional IS-SPSW all decrease.The design parameter of span-to-height ratio has a significant impact on the lateral bearing capacity,but produces minor impact on the hysteretic behavior,lateral stiffness and energy dissipation capacity.Compared with TT-SPSW,bidirectional IS-SPSW has more pinching hysteretic loops and higher lateral bearing capacity.It can be used as a lateral-resisting component in self-centering structure,which reduces the amount of self-centering components significantly.