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屈曲约束支撑(Buckling Restrained Brace,简称BRB)作为具有良好耗能能力的新型支撑被广泛使用。与此同时,金属阻尼器发展迅速,也为结构抗震设计提供了新思路。将金属阻尼器与传统支撑(文中采用方钢管)结合设计出新型TTD(Tube-in-Tube Damper)支撑,其屈服承载力由阻尼器承载力决定,刚度由方钢管与阻尼器共同决定。改变长度与屈服承载力,设计对应的BRB与TTD支撑,对比两者用钢量,发现刚度与屈服承载力相当的TTD支撑相比BRB可节省用钢量,在承载力较小与支撑长度较大情况中尤其明显,这为地震作用下支撑设计提供了新的思路。
Buckling Restrained Brace (BRB) is widely used as a new type of brace with good energy dissipation capability. At the same time, the rapid development of metal dampers also provides new ideas for seismic design of structures. The new type of TTD (Tube-in-Tube Damper) support is designed by combining the metal damper with the traditional support. The yield capacity is determined by the bearing capacity of the damper. The stiffness is determined by the square steel pipe and the damper. Change the length and yield capacity, design the corresponding BRB and TTD support, compare the amount of both steel and found that the stiffness and yield strength comparable TTB BRB steel can save compared to the amount of steel, the smaller the bearing capacity and the length of the support This is especially evident in large cases, which provides a new way of thinking for supporting design under earthquake action.