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为研究防屈曲支撑对巨型结构的减震控制效果,首先采用SAP2000,按照现行规范8度设防的要求,设计了一座48层巨型框架结构,并将此结构的所有普通支撑分别用与其等刚度和等面积的防屈曲支撑代替,得到等刚度防屈曲支撑巨型结构和等面积防屈曲支撑巨型结构,然后对3个结构进行8度、8.5度和9度罕遇地震作用下的弹塑性时程分析。分析结果表明:在8度罕遇地震作用下,防屈曲支撑巨型结构较巨型结构的最大层间位移角有明显减小,且层间位移角变化更均匀;防屈曲支撑巨型结构能达到“大震可修,超大震不倒”的抗震设防目标,提高了结构的安全储备。
In order to study the damping control effect of the buckling brace on the giant structure, a 48-layer mega-frame structure was designed by using SAP2000 in accordance with the requirements of 8 degree fortification in the current codes. All ordinary supports of this structure were designed with their equivalent stiffness and The buckling brace with equal area is replaced by the buckling brace with equal stiffness and the buckling brace with the same area, and then the elasto-plastic time-history analysis of the three structures subjected to the rare earthquakes of 8, 8.5 and 9 degrees . The analysis results show that under the action of 8 degree rare earthquakes, the maximum inter-story drift angle of the buckling-supported mega-structure is significantly reduced and the variation of the inter-story drift angle is more uniform. The buckling- Great earthquake can be repaired, large earthquake does not fall "earthquake-resistant fortification goals, improve the safety of the structure reserves.