防屈曲开斜槽耗能钢板剪力墙的滞回性能分析

Hysteretic Behavior of Buckling-restraining Slotted Steel Plate Shear Wall

防屈曲开斜槽耗能钢板剪力墙(简称开斜槽剪力墙)是通过在钢板上开设一定数量斜槽,并在其两侧外挂混凝土板而形成的一种新型高层钢结构抗侧耗能构件。根据开斜槽钢板剪力墙的承载机制,采用理论推导的方法得到其承载力计算公式,利用ANSYS有限元方法对开斜槽剪力墙进行模拟,并通过改变不同参数验证了计算公式的准确性。同时,采用ANSYS建立有限元模型,对开斜槽剪力墙和普通薄钢板剪力墙的滞回性能进行了对比分析。结果表明,在提供足够约束(钢板与混凝土板间隙适宜,混凝土板厚度足够)的前提下,相对于普通薄钢板剪力墙,开斜槽剪力墙改善了钢板的捏缩现象,具有更稳定的耗能能力。

As an innovative lateral force-resisting and energy-dissipating system, buckling-restrai- ning slotted steel plate shear wall （BR-SSPSW） is composed of steel frame and infilled steel plate, which has some slots arranged in oblique direction and encasement of pre-casted RC cover plates on both sides. Formula for predicting the ultimate shear capacity is derived according to the typical collapse mechanism of the BR-SSPSW. A detailed ANSYS FEM parameter study is carried out to verify the theoretical formula. In the meantime, the hysteretic behavior of the BR- SSPSW is investigated, and the result shows that its energy-dissipating capacity is improved significantly under the precondition of enough rigidity （means appropriate gap between two plates, and enough thickness of the concrete plate ） concrete plates offer, and it has more stable energydissipating capability.