摘要
为使结构在整个生命周期、在遭受所有可能的外部荷载作用下能达到各种预定功能和性能目标的要求,基于性能的结构设计被广泛接受。以美国太平洋地震工程研究中心PEER基于性能的抗震设计理论为基础,建立结构基于性能的抗风设计(Performance-Based Wind Engineering,简称PBWE)概率评估框架。考虑特定场地风速的随机特性,借鉴结构抗震极限状态年平均超越概率闭式表达式的推导方法,在做适当假定的条件下获得结构抗风需求年平均超越概率闭式表达式。以某高耸结构为例,将结构关键部位加速度峰值响应和位移峰值响应作为抗风性能的评判标准,进行高耸结构基于性能的抗风设计概率评估。
Performance-based design was widely used to realize structural multi-level performance objectives under all possible external loadings during a life cycle of a structure. Based on the performance-based aseismic design approach pursued by US Pacific Earthquake Engineering Research （PEER） center, the probabilistic assessment framework of a performance-based anti-wind design was developed, According to the close-form expression of mean annual frequency of exceeding limit state for seismic design, the close-form expression of the mean annual frequency of exceeding structural wind-resistant demand was derived under some simplified assumptions, with the consideration of random features of wind velocity at specific sites. A typical high-rise building was adopted as an example to present the probabilistic assessment of its performance-based anti-wind design, its peak acceleration and peak displacement at key joints were acted as the evaluation criteria of the wind-resistant performance levels.
出处
《振动与冲击》
EI
CSCD
北大核心
2013年第3期87-94,105,共9页
Journal of Vibration and Shock
关键词
基于性能的抗风设计
高耸结构
概率评估
闭式表达
performance-based anti-wind design
high-rise buildings
probabilistic assessment
closed-form expression
