耗能减震结构中耗能器总耗能层间分配比例研究
|
摘要
对于沿层高方向均匀布置耗能器的耗能减震结构,耗能器总耗能各层间分配比例的合理估计是耗能减震结构基于能量的设计方法需解决的问题之一。本文以3层7、层、12层均匀布置不同类型耗能器的混凝土框架结构为例,分析了地震动幅值对层间分配比例的影响,结果表明,线性粘滞阻尼器总耗能的层间分配比例不受地震动幅值的影响,非线性粘滞阻尼器和金属耗能器总耗能各层间分配比例受地震动幅值影响较小,可忽略不计。以一受正弦函数激励作用的均匀布置耗能器的多自由度系统为研究对象,推导了不同类型耗能器总耗能各层间分配比例的近似计算公式,以8条不同场地类型地震波为输入,分别对3层、7层1、2层附加不同类型耗能器的结构进行时程分析。采用近似计算公式的计算值与时程分析值的对比表明,线性粘滞阻尼器总耗能层间分配比例近似值与时程分析值吻合较好,非线性粘滞阻尼器和金属耗能器总耗能各层间分配比例近似值与时程分析值差别不大,在基于能量的设计中可采用近似值估计分配比例值。
For the damping absorption energy structure with dampers uniform layout along the direction of the height,to estimate the total energy consumption of dampers distributed between stories rational is one of the issues to be resloved for the design based on energy.In this paper,taking 3 stories,7 stories,12 stories of concrete framework with different types of dampers uniform layout as an example the impact of the seismic amplitude to the ratio between the stories studied.The results showe that the ratio of the total energy distributed between stories for the linear viscous damper is irrelevant while small for the nonlinear viscous damper and metal damper.so it can be ignored.With a sine function stimulation of many-degree-of-freedom systerm that uniform layout dampers to study,the approximate caculation formulas of the ratio between stories about the total energy of dampers are Devived.By inputting 8 seismic waves of different types land,the example structure with different dampers is analyzed.The comparison between the caculated values with approximate formula and the actual value shows that the ratio of total energy consumption between caculated value and actual value is good agreement for linear viscous dampers,while there is small difference for nonlinear viscous dampers and metal dampers.It can be estimate value of the ratio for actual use while design based on energy.
For the damping absorption energy structure with dampers uniform layout along the direction of the height,to estimate the total energy consumption of dampers distributed between stories rational is one of the issues to be resloved for the design based on energy.In this paper,taking 3 stories,7 stories,12 stories of concrete framework with different types of dampers uniform layout as an example the impact of the seismic amplitude to the ratio between the stories studied.The results showe that the ratio of the total energy distributed between stories for the linear viscous damper is irrelevant while small for the nonlinear viscous damper and metal damper.so it can be ignored.With a sine function stimulation of many-degree-of-freedom systerm that uniform layout dampers to study,the approximate caculation formulas of the ratio between stories about the total energy of dampers are Devived.By inputting 8 seismic waves of different types land,the example structure with different dampers is analyzed.The comparison between the caculated values with approximate formula and the actual value shows that the ratio of total energy consumption between caculated value and actual value is good agreement for linear viscous dampers,while there is small difference for nonlinear viscous dampers and metal dampers.It can be estimate value of the ratio for actual use while design based on energy.
引文
[1]Housner G W.Limit Design of Structures to ResistEarthquake[A],Proc.of IWCEE[C],Berkeley,CA,1956,5.1~5.11
[2]周云.粘滞阻尼减震结构设计[M].武汉:武汉理工大学出版社,2006
[3]周云.金属耗能减震结构设计[M].武汉:武汉理工大学出版社,2006
[4]周云,周福霖.耗能减震体系的能量设计方法[J].世界地震工程,1997,13(4):7~13
[5]Hyunhoon Choi,Jinkoo Kim.Energy-based seismic design ofbuckling-restrained braced frames using hysteretic energyspectrum[J].Engineering Structures,2006,28
[6]经杰,叶列平,钱稼茹.基于能量概念的剪切型多自由度体系弹塑性地震位移反应分析[J].工程力学,2003,20(3):31~37Jing Jie,Ye Lie-ping,Qian Jia-ru.Inelastic seismic responseof lumped mass MDOF systems based on energy concept[J].Engineering Mechanics,2003,20(3):31~37(inChinese)
[7]史庆轩,熊仲明,李菊芳.框架结构滞回耗能在结构层间分配的计算分析[J].西安建筑科技大学学报(自然科学版),2005,37(2):174~178Shi Qing-xun,Xiong Zong-ming,Li Ju-fang.Calculationanalysis of the storey distribution of hysteretic energy forframe structures[J].J.Xi’an Univ.of Arch&Tech(NaturalScience Edition),2005,37(2):174~178(in Chinese)
[8]沈蒲生,朱建华.基于Pushover方法的框筒结构在水平地震作用下的层间耗能研究[J].工程抗震与加固改造,2006,28(3):1~6Shen Pu-sheng,Zhu Jian-hua.Analysis of energy dissipationamong stories of reinforced concrete frame-tube structureunder horizontal earthquake based on pushover method[J].Earthquake Resistant Engineering Retrofitting,2006,28(3):1~6(in Chinese)
[2]周云.粘滞阻尼减震结构设计[M].武汉:武汉理工大学出版社,2006
[3]周云.金属耗能减震结构设计[M].武汉:武汉理工大学出版社,2006
[4]周云,周福霖.耗能减震体系的能量设计方法[J].世界地震工程,1997,13(4):7~13
[5]Hyunhoon Choi,Jinkoo Kim.Energy-based seismic design ofbuckling-restrained braced frames using hysteretic energyspectrum[J].Engineering Structures,2006,28
[6]经杰,叶列平,钱稼茹.基于能量概念的剪切型多自由度体系弹塑性地震位移反应分析[J].工程力学,2003,20(3):31~37Jing Jie,Ye Lie-ping,Qian Jia-ru.Inelastic seismic responseof lumped mass MDOF systems based on energy concept[J].Engineering Mechanics,2003,20(3):31~37(inChinese)
[7]史庆轩,熊仲明,李菊芳.框架结构滞回耗能在结构层间分配的计算分析[J].西安建筑科技大学学报(自然科学版),2005,37(2):174~178Shi Qing-xun,Xiong Zong-ming,Li Ju-fang.Calculationanalysis of the storey distribution of hysteretic energy forframe structures[J].J.Xi’an Univ.of Arch&Tech(NaturalScience Edition),2005,37(2):174~178(in Chinese)
[8]沈蒲生,朱建华.基于Pushover方法的框筒结构在水平地震作用下的层间耗能研究[J].工程抗震与加固改造,2006,28(3):1~6Shen Pu-sheng,Zhu Jian-hua.Analysis of energy dissipationamong stories of reinforced concrete frame-tube structureunder horizontal earthquake based on pushover method[J].Earthquake Resistant Engineering Retrofitting,2006,28(3):1~6(in Chinese)
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