随机地震模型及反应谱分析  

A RANDOM SEISMIC MODEL AND ANALYSIS OF RESPONSE SPECTRA

作　　者：戴湘和[1] 张宪宏[2] 

机构地区：[1]长江科学院,中国武汉430010 [2]清华大学,中国北京100000

出　　处：《地震工程与工程振动》1995年第2期118-127,共10页Earthquake Engineering and Engineering Dynamics

摘　　要：本文以实际地震加速度的频谱特性和相位谱特性为依据,仿概率统计理论中的高斯概率密度函数,建立了随机地震加速度频谱数学模型。通过选用不同的模型参数,用自编的程序进行大量的计算,得到了具有不同特性的随机地震加速度反应谱曲线。根据地震场地条件与地面运动主周期的对立关系,本文对具有不同主频率特性的地震加速度反应谱曲线进行了分区整理,得到了基本适合各类地震场地特性的外包、中值、内切反应谱,并将三种反应谱与Housner平均加速度反应谱、ELCentro地震加速度反应谱包线及我国工民建抗震设计规范中的标准设计反应谱进行比较分析。On the basis of Fourier-amplitude-spectra properties of deterministic earthquake accelerations and by imitating Gauss's probability density function,the paper constituted a mathematical model of random earthquake acceleratioon Fourier-amplitude-spectra. By means of assuming different model parameters a series of random earthquake acceleration response spectra were obtained with a special computer program. According to well acknowledged data of ground motion the paper divided earthquake acceleration response spectra into three groups (of maximum value mean and minimum) corresponding to the geotechnical conditions of earthquake site as a criterion. Detailed comparison was made for the obtained acceleration response spectra with Housner's average acceleration spectrum,El Centro earthquake acceleraion (1940. 5.18,N-S) response spectrum and the Chinese standard response spectra for aseismic design (1978).

关 键 词：随机地震模型 反应谱 建筑 抗震设计 

分 类 号：TU352.110[建筑科学—结构工程]