土-结构非线性相互作用体系演变随机过程响应分析
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摘要
在假定结构体系受到非均匀调制的演变随机激励基础上,考虑到地震动强度和频谱非平稳特性,应用等效线性化方法分析了土-结构相互作用体系在演变随机激励下的响应演变谱和时变均方根响应,给出了一种实用计算方法,再通过示例叙述了此方法的实施过程。计算结果表明,地震动频谱非平稳特性对非线性相互作用体系响应有较大的影响。
The evolutionary random excitation acting on structures is assumed to be non-uniformly modulated.The non-stationary characters of earthquake motion of intensity and frequency are considered,and the soil-structure interaction system is analysed by equivalent linearization method.The evolutionary spectra and time-variant cross-correlation function of the response for the soil-structure interaction system are obtained,and one utility method of calculation and its process are also given.The numerical example shows that the inelastic response of the soil-structure interaction system is affected significantly by the characters of the frequency non-stationarity of seismic ground motion.
The evolutionary random excitation acting on structures is assumed to be non-uniformly modulated.The non-stationary characters of earthquake motion of intensity and frequency are considered,and the soil-structure interaction system is analysed by equivalent linearization method.The evolutionary spectra and time-variant cross-correlation function of the response for the soil-structure interaction system are obtained,and one utility method of calculation and its process are also given.The numerical example shows that the inelastic response of the soil-structure interaction system is affected significantly by the characters of the frequency non-stationarity of seismic ground motion.
引文
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8林家浩.受非平稳均匀调制随机演变激励结构响应快速精确算法.计算力学学报,1997,14(1):2~8
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10 Kanai K.Semi-Empirical Formula for the Seismic Characteristics ofGround.Bull.Seims.Earthq.Res.Inst,Tokyo University,1957,35:306~325
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12孙景江,江近仁.与规范反应谱相对的金井清谱的谱参数.地震工程与工程振动,1985,5(3):42~48
13张国栋,王钊,等.土与结构相互作用体系随机演变激励响应分析.武汉大学学报(工学版),2003,37(2):1~4
14张国栋.基于均匀调制随机模型的土与结构相互作用体系地震反应分析.工业建筑,2005,35(增):468~470
15尹之潜.在地震荷载作用下多层框架结构的弹塑性分析.地震工程与工程振动,1981,1(2):56~77
16王君杰,周晶.地震动频谱非平稳性对结构非线性反应的影响.地震工程与工程振动,1997,17(2):16~20
2甘幼.随机振动的基本理论与应用.长沙:湖南科学技术出版社,1981
3 Spanos P-T D,Iwan W D.On the Existence and Uniquencess ofSolutions Generated by Equivalent Linearization.Nonlinear Mechanics,1978,13(2):64~71
4 Iwan W D.Estimating Inelastic Response Spectra from Elastic Spectra.EESD,1980,8(4):81~99
5 Gulkan P,Sozen M A.Inelastic Response of Reinforced ConcreteStructure to Earthquake Motions.J.ACI,1974,71(12):159~171
6江近仁,陆钦年.多自由度滞变结构随机地震反应分析的均值反应谱方法.地震工程与工程振动,1984(4):1~13
7 Priestley M B.Power Spectral Analysis of Non-Stationary RandomResponses.J.Sound Vib.,1967,6(1):86~97
8林家浩.受非平稳均匀调制随机演变激励结构响应快速精确算法.计算力学学报,1997,14(1):2~8
9方同.两类演变激励下的响应问题.西北工业大学学报,1997,15(4):528~535
10 Kanai K.Semi-Empirical Formula for the Seismic Characteristics ofGround.Bull.Seims.Earthq.Res.Inst,Tokyo University,1957,35:306~325
11欧进萍,牛荻涛,等.设计用随机地震动的模型及其参数确定.地震工程与工程振动,1991,11(3):34~40
12孙景江,江近仁.与规范反应谱相对的金井清谱的谱参数.地震工程与工程振动,1985,5(3):42~48
13张国栋,王钊,等.土与结构相互作用体系随机演变激励响应分析.武汉大学学报(工学版),2003,37(2):1~4
14张国栋.基于均匀调制随机模型的土与结构相互作用体系地震反应分析.工业建筑,2005,35(增):468~470
15尹之潜.在地震荷载作用下多层框架结构的弹塑性分析.地震工程与工程振动,1981,1(2):56~77
16王君杰,周晶.地震动频谱非平稳性对结构非线性反应的影响.地震工程与工程振动,1997,17(2):16~20
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