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当钢结构承受侧向荷载时,常采用中心支撑框架。然而,受扭和受压时支撑的滞回性能是不对称的。当受压时,这种框架的强度会持续退化,故采用屈曲约束支撑解决这个问题。屈曲约束支撑的钢芯长度对整体性能影响很大,因为它直接影响着杆件的耗能能力。屈曲约束支撑相当于阻尼,可耗散地震能量,尤其当作为支撑中的“保险”时。短的改进屈曲约束支撑可称为阻尼屈曲约束支撑,好比沿着支撑构件设置了阻尼。制作这种阻尼屈曲约束支撑,并进行试验及分析。对核心板和节点的局部改进,提出了一些建议。
When the steel structure to withstand lateral loads, often using the central support frame. However, the hysteretic behavior of the support during torsional and compressive loading is asymmetric. When pressed, the strength of this frame will continue to degenerate, so the buckling restraint brace to solve this problem. The length of the steel core supported by the buckling constraint has a great effect on the overall performance because it directly affects the rod’s energy dissipation capacity. Buckling restraints support the equivalent of damping, which dissipates seismic energy, especially when used as a “insurance” in support. A short, improved buckling restraint brace can be referred to as a damping buckling restraint brace, such as a damping set along the brace member. Make this damping buckling restraint brace, and test and analysis. Some suggestions are given for the local improvement of the core board and the nodes.