基于随机振动的多层框架结构地震响应分析
发布时间：2019-06-19 20:56
【摘要】：随着现代实验和计算机技术的迅速发展,随机振动理论在土木工程实践中应用非常广泛。二十年来我国在随机振动领域作出了多项具有国际影响的突破性成果,其中包括虚拟激励法。虚拟及理论法首先在中国发展出来和快速地得到日益广泛的应用也并不是偶然的,它的出发点只是在基本方程中作了一次参数的转换,看似简单,但是也已经满足了经典的随机振动均方解的表达。我国是一个地震多发国家,且地震区较分散,所以对建筑结构进行抗震研究具有非常重要的意义。随机振动虚拟激励法在其计算效率等方面较其他任何传统计算方法而言都有实质性的突破。虚拟激励法是把平稳随机响应转变成简谐响应然后计算、把非平稳的随机响应转变普通逐步积分进行计算分析。主要研究混凝土框架结构在随机地震动作用下结构响应的计算方法与地震响应特征进行分析,从以下几个方面开始着手研究： 1.确定何如将地震加速度转化成曲线并在模型中实现；综合大量的理论数据以及一些参考文献,将虚拟激励法的理论方面的知识弄的清晰,使其原理比较明确,为以后建模及使用结论做好理论依据。 2.根据随机振动虚拟激励法,对多层框架结构进行随机地震的响应分析,对多层框架结构进行简化的处理,并根据随机振动虚拟激励法使用MATLAB自编小程序与通用的有限元软件SAP2000分别对模型进行自振分析并比较。 3.通过软件计算、分析,总结分析结果,得出有益结论,可以再地震中有良好的使用价值,这才是研究的最终目的。
[Abstract]:With the rapid development of modern experiments and computer technology, random vibration theory is widely used in civil engineering practice. In the past 20 years, China has made many breakthroughs in the field of random vibration, including virtual excitation method. It is not accidental that the virtual and theoretical methods have been developed and applied more and more quickly in China. Its starting point is only to make a parameter transformation in the basic equation, which seems simple, but also satisfies the classical expression of the mean square solution of random vibration. China is a country with frequent earthquakes, and the seismic area is scattered, so it is of great significance to carry out seismic research on building structures. Compared with any other traditional calculation method, the random vibration virtual excitation method has a substantial breakthrough in its computational efficiency. The virtual excitation method converts the stationary random response into the harmonic response and then calculates the non-stationary random response into the ordinary stepwise integral for calculation and analysis. This paper mainly studies the calculation method and seismic response characteristics of concrete frame structure under random ground motion, and starts from the following aspects: 1. It is determined why the seismic acceleration should be transformed into a curve and realized in the model, and the theoretical knowledge of the virtual excitation method can be made clear by synthesizing a large number of theoretical data and some references, so that the principle of the virtual excitation method can be made clear, and the theoretical basis for the future modeling and application of the conclusion will be made. two銆，
本文编号：2502640
[Abstract]:With the rapid development of modern experiments and computer technology, random vibration theory is widely used in civil engineering practice. In the past 20 years, China has made many breakthroughs in the field of random vibration, including virtual excitation method. It is not accidental that the virtual and theoretical methods have been developed and applied more and more quickly in China. Its starting point is only to make a parameter transformation in the basic equation, which seems simple, but also satisfies the classical expression of the mean square solution of random vibration. China is a country with frequent earthquakes, and the seismic area is scattered, so it is of great significance to carry out seismic research on building structures. Compared with any other traditional calculation method, the random vibration virtual excitation method has a substantial breakthrough in its computational efficiency. The virtual excitation method converts the stationary random response into the harmonic response and then calculates the non-stationary random response into the ordinary stepwise integral for calculation and analysis. This paper mainly studies the calculation method and seismic response characteristics of concrete frame structure under random ground motion, and starts from the following aspects: 1. It is determined why the seismic acceleration should be transformed into a curve and realized in the model, and the theoretical knowledge of the virtual excitation method can be made clear by synthesizing a large number of theoretical data and some references, so that the principle of the virtual excitation method can be made clear, and the theoretical basis for the future modeling and application of the conclusion will be made. two銆，
本文编号：2502640
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