内嵌屈曲约束钢板剪力墙钢框架的性能参量及计算方法

钢框架延性好，但抗侧承载力和刚度较小，一般可加设钢板墙等抗侧力构件来达到结构的抗侧需求。屈曲约束钢板剪力墙是一种新型抗侧力构件，通过面外约束板的限制，钢板墙在剪力下不会发生屈曲破坏，因此其抗侧刚度、承载力和延性均较大。屈曲约束钢板剪力墙钢框架不但大大提高了原框架的刚度和承载力，同时还具备良好的延性。考虑到加设钢板墙后，框架梁的抗剪刚度与承载力可能不足，该文选取研究的屈曲约束钢板墙除了上下端与框架梁连接外，部分还与框架柱连接。对于这种新型内嵌屈曲约束钢板墙钢框架，该文从理论上详细推导了结构的抗侧刚度、屈服承载力等力学性能参量计算方法，得到了相应的理论公式。通过相关文献的试验数据对比，发现理论计算值与试验值很接近。

MECHANICAL PROPERTIES AND CALCULATION OF THE BUCKLING RESTRAINED STEEL PLATE SHEAR WALLS EMBEDDED STEEL FRAME

Steel frames have good ductility, but their lateral resistant capacity and stiffness are relatively low. To meet the requirement of structural lateral stiffness and capacity, the frame is usually filled with lateral components, such as steel plate shear walls. The buckling restrained steel plate shear wall (BRSPSW) is an innovative steel plate wall. It never buckles when suffering shear force. It has high lateral resistant capacity, stiffness as well as ductility. The BRSPSW embedded steel frame can greatly improve the lateral stiffness and capacity of the bare frame, and also has excellent ductility. The BRSPSW used in this study is connected to the beams with its top and bottom sides, and partly welded to the columns with its core plate extend end, which can strengthen the shear capacity and stiffness of the beam. This paper theoretically studies the lateral resistant stiffness, yield capacity of the BRSPSW embedded steel frame and their analytical solutions. According to the mechanical model, the lateral displacement induced by shear and bending deformation should be taken into consideration to calculate the structure’s lateral stiffness. The yield capacity of this structure can be divided as shear capacity and bending capacity, in accordance with the yielding pattern of the structure. The comparison between theoretical values and the test data from literature show that they are very close to each other.