摘要
考虑层间隔震体系(上部隔震结构、中间层隔震结构、下部隔震结构)随机参量和地震激励的不确定性,利用随机响应面方法,结合基于线性无关原则的概率配点方法,将隐式的结构响应函数转换成显式函数,在此基础上利用Monte-Carlo分别对3种隔震结构形式可靠度进行分析,并分析了其对应的可靠度灵敏度。结果表明:层间隔震体系中,各随机变量均值变化对体系的可靠度将会产生不同的影响,各随机变量方差的增加都将降低体系的可靠度;可通过优化设计变量,严格控制施工质量(控制变量方差),降低其对体系可靠度的影响。可靠度灵敏度的分析结果可以提供体系的可靠度指标对随机参量变化的重要性排序,从而提高大型复杂结构的可靠度分析和优化设计的效率,同时为层间隔震体系可靠度灵敏度的进一步研究奠定基础。
Considering the uncertainties of the stochastic parameters of an inter-story isolation system and seismic excitation,the implicit structural response function is transformed into an explicit one by SRSM(Stochastic Response Surface Method),combined with the probabilistic collocation method based on the linear independence principle.Then,the reliability and sensitivity of the structure are analyzed using the Monte-Carlo.The results show that the change of each stochastic variant average has different effects on system reliability,which is reduced as the variance of each variant increases.Optimizing design variables and controlling construction quality are important in reducing their impact on the system′s reliability.The analysis results of the reliability sensitivity can provide system reliability indexes to rank stochastic parameters by importance,in order to improve the efficiency of the large-scale complex structure reliability analysis and optimization design.The results also lay the foundation for further study of the reliability sensitivity of the inter-story isolation system.
出处
《振动．测试与诊断》
EI
CSCD
北大核心
2016年第1期102-107,200-201,共6页
Journal of Vibration,Measurement & Diagnosis
基金
国家重点基础研究发展计划(“九七三”计划)资助项目(2012CB723300
2012CB723304)
国家科技支撑计划子课题资助项目(2012BAJ07B02)
国家自然科学基金重点资助项目(91315301-07)
国家自然科学基金资助项目(51078097
51178211)
广州市羊城学者科技计划资助项目(10A032D)
关键词
层间隔震体系
随机响应面法
线性无关概率配点
首超破坏准则
可靠度灵敏度
inter-story isolation system
stochastic response surface method(SRSM)
linearly independent probabilistic collocation
first-excursion failure
reliability sensitivity
