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本文是以地震地面运动影响结构物反应的最本质的工程特征——地震烈度来进行地震地面运动等级的划分作基础而提出的在地震作用下多层剪切型房屋可靠性分析的基本方法。文中根据给定地区某一地震烈度的地震地面运动发生的频度建立了此烈度等级地震地面运动发生次数的概率函数。并在把地震地面加速度模拟为高斯平稳随机过程,取多层剪切型房屋(高宽比<4)的第一振型作为考虑结构连续工作概率的出发点的基础上,提出了结构在某一烈度等级地震地面运动作用下不发生破坏概率的计算方法。据此,本文得到了所有可能烈度等级地震地面运动作用下多层剪切型房屋的可靠性函数公式,初步解决了多层剪切型房屋在地震下的可靠计算问题。
This paper proposes a basic method for the reliability analysis of multi-story shearing buildings under seismic action based on the earthquake seismic intensity which is the most essential engineering feature of earthquake response to structural reactions. The probability function of the number of occurrences of ground motion at this intensity level earthquake is established based on the occurrence frequency of the earthquake ground motion of a certain earthquake intensity in a given region. In addition, the ground acceleration of the earthquake is modeled as a Gaussian stationary stochastic process, and the first vibration mode of the multilayer shear house (height-to-width ratio<4) is taken as the starting point for considering the continuous operating probability of the structure. Calculation Method of Failure Probability Caused by Seismic Ground Motion at Intensity Level . Based on this, this paper obtains the reliability function formulas of multi-story shear-type houses under the action of ground motions of all possible seismic intensity earthquakes, and initially solves the problem of reliability calculation of multi-story shear buildings under earthquakes.