论文部分内容阅读
按中国规范设计了有代表性的8、9度抗震设防的偏心支撑钢框架共计24个,采用增量动力分析倒塌分析方法,以倒塌富余度为衡量指标,按照FEMA P695评估体系对该结构体系的抗地震倒塌安全性进行研究。结果表明:K形、V形偏心支撑钢框架满足FEMA P695对倒塌富余度的要求,拥有必要的抗地震倒塌能力;结构倒塌富余度随结构层数(高度)增加而减小,高度越大的结构抗地震倒塌性能越差,遭遇强烈地震时倒塌概率越大;在遭受各自对应的罕遇地震时,8度设防区的结构比9度设防区的结构拥有更大的倒塌富余度,倒塌风险更低;V形偏心支撑钢框架比K形偏心支撑钢框架拥有更大的倒塌富余度。
A total of 24 eccentric steel frames with anti-seismic fortification of 8 and 9 degrees were designed according to China’s code. By adopting incremental dynamic analysis and collapse analysis method, taking the collapse allowance as a measure index, according to the FEMA P695 evaluation system, The earthquake collapse safety research. The results show that the K-shaped and V-shaped eccentric support steel frame meets the requirements of FEMA P695 for the collapse allowance and possesses necessary anti-seismic collapse ability. The structural collapse allowance decreases with the increase of structural story height (height), and the greater the height The worse the anti-seismic collapse performance of the structure, the greater the probability of collapsing in the event of a strong earthquake. In the case of a rare earthquake corresponding to each of them, the structure of the 8th zone has more collapse allowances than the 9th zone, Lower; V-shaped eccentrically braced steel frame has greater collapse allowance than K-shaped eccentric supported steel frame.