高层隔震结构风振研究
|
摘要
为研究高层隔震结构的风振响应,采用线性回归滤波器法模拟脉动风速时程,并将其与平均风速转化为风压时程输入某25层高层隔震结构,对比结构在20年、30年和50年一遇风荷载下的抗风稳定性,并分析结构在地震中的减震性能。结果表明,为保证高层隔震结构在地震中有一定减震性能,要使隔震层满足遭遇50年一遇的风荷载不屈服较为困难,因此,本文建议考虑隔震层遭遇20年～30年一遇的风荷载不屈服,而高层隔震结构顶部风振加速度一般可以满足人体舒适度指标。
To study the wind-induced response of high-rise isolated structure,fluctuating wind speed time series is simulated by employing auto-regressive linear filtering method,with which average wind speed is translated into fluctuating wind load and input into the high-rise isolated structure.And the stability of wind resistance of the isolated structure is contrasted in enduring 20,30 and 50-year return period wind load.Then the analysis of the earthquake energy absorption properties of the high-rise isolated structure is carried out.The results show that with enduring 50-year return period wind load,it's difficult to keep isolation layer unyield while the excellence in the earthquake energy absorption properties of the isolated structure is kept.Therefore,it's proposed in this essay that to keep isolation layer unyield with enduring 20 to 30 year return period wind load could be considered;and the acceleration of the top of the isolated structure can generally meet the human comfort degree index.
To study the wind-induced response of high-rise isolated structure,fluctuating wind speed time series is simulated by employing auto-regressive linear filtering method,with which average wind speed is translated into fluctuating wind load and input into the high-rise isolated structure.And the stability of wind resistance of the isolated structure is contrasted in enduring 20,30 and 50-year return period wind load.Then the analysis of the earthquake energy absorption properties of the high-rise isolated structure is carried out.The results show that with enduring 50-year return period wind load,it's difficult to keep isolation layer unyield while the excellence in the earthquake energy absorption properties of the isolated structure is kept.Therefore,it's proposed in this essay that to keep isolation layer unyield with enduring 20 to 30 year return period wind load could be considered;and the acceleration of the top of the isolated structure can generally meet the human comfort degree index.
引文
[1]杜永峰,朱前坤.高层隔震建筑风振响应研究[J].工程抗震与加固改造,2008,30(6):64～68Du Yong-feng,Zhu Qian-kun.Analysis on wind-induced respond of tall-story isolation[J].EarthquakeResistant Engineering and Retrofittin,2008,30(6):64～68(in Chinese)
[2]李黎,樊爱武,胡亮,张行.滑移隔震结构的抗风稳定性分析[J].世界地震工程,2007,23(4):148～152Li Li,Fan Ai-wu,Hu Liang,Zhang Hang.Analysis ofwind resisting stability of a sliding isolation structure[J].World Earthquake Engineering,2007,23(4):148～152(in Chinese)
[3]金星,韦永祥,康兰池,李军.隔震建筑结构的风振观测与初步分析[A].第七界全国地震工程学术会议论文集[C],广州,2006:923～931Jin Xing,Wei Yong-xiang,Kang Lan-chi,Li Jun.Observation and preliminary analysis on isolatedstructure vibration under wind load[A].Proceedings ofthe seventh national conference on earthquakeengineering[C],Guangzhou,2006:923～931(in Chinese)
[4]Iwatani Y.Simulation of multidimensional windfluctuations having any arbitrary power spectra andcross-spectra[J].Journal of Wind Engineering,1982,11(1):5～18
[5]GB50009-2001,建筑结构荷载规范[S]GB 50009-2001,Load code for the design of buildingstructures[S](in Chinese)
[6]秦效启.钢结构技术规范规程概论[M].上海:同济大学出版社,1999Qing Xiao-qi.Introduction to Specification and Standard of Steel Structure[M].Shanghai:Tongji UniversityPress,1999(in Chinese)
[7]祁皑,范宏伟.基于结构设计的基础隔震结构高宽比限值的研究[J].土木工程学报,2007,40(4):13～20Qi Ai,Fan Hong-wei.A structural design study on thelimit of height-width ratio of base-isolated structures[J].China Civil Engineering Journal,2007,40(4):13～20(in Chinese)
[8]CECS 126:2001,叠层橡胶支座隔震技术规程[S]CECS 126:2001,Technical specification for seismic-isolation with laminated bearing isolators[S](inChinese)
[2]李黎,樊爱武,胡亮,张行.滑移隔震结构的抗风稳定性分析[J].世界地震工程,2007,23(4):148～152Li Li,Fan Ai-wu,Hu Liang,Zhang Hang.Analysis ofwind resisting stability of a sliding isolation structure[J].World Earthquake Engineering,2007,23(4):148～152(in Chinese)
[3]金星,韦永祥,康兰池,李军.隔震建筑结构的风振观测与初步分析[A].第七界全国地震工程学术会议论文集[C],广州,2006:923～931Jin Xing,Wei Yong-xiang,Kang Lan-chi,Li Jun.Observation and preliminary analysis on isolatedstructure vibration under wind load[A].Proceedings ofthe seventh national conference on earthquakeengineering[C],Guangzhou,2006:923～931(in Chinese)
[4]Iwatani Y.Simulation of multidimensional windfluctuations having any arbitrary power spectra andcross-spectra[J].Journal of Wind Engineering,1982,11(1):5～18
[5]GB50009-2001,建筑结构荷载规范[S]GB 50009-2001,Load code for the design of buildingstructures[S](in Chinese)
[6]秦效启.钢结构技术规范规程概论[M].上海:同济大学出版社,1999Qing Xiao-qi.Introduction to Specification and Standard of Steel Structure[M].Shanghai:Tongji UniversityPress,1999(in Chinese)
[7]祁皑,范宏伟.基于结构设计的基础隔震结构高宽比限值的研究[J].土木工程学报,2007,40(4):13～20Qi Ai,Fan Hong-wei.A structural design study on thelimit of height-width ratio of base-isolated structures[J].China Civil Engineering Journal,2007,40(4):13～20(in Chinese)
[8]CECS 126:2001,叠层橡胶支座隔震技术规程[S]CECS 126:2001,Technical specification for seismic-isolation with laminated bearing isolators[S](inChinese)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心