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首页> 外文期刊>Journal of Earthquake Engineering >SYSTEM IDENTIFICATION OF LANDFILL SEISMIC RESPONSE
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SYSTEM IDENTIFICATION OF LANDFILL SEISMIC RESPONSE

机译：填土地震响应的系统识别

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Assessment of landfill seismic response necessitates the availability of reliable dynamic material properties. During the past decade, geophysical surveys and computational studies have been conducted to investigate the seismic response of the Operating Industries, Inc. (OII) landfill in Southern California. In this paper, a survey and summary of available research results is presented. In addition, a set of OII input-output seismic records during six earthquakes is thoroughly analysed. Spectral analyses are conducted to shed light on the landfill dynamic response characteristics. A simple shear beam model is found to be useful in modelling the landfill resonant behaviour. System identification techniques are employed to estimate the landfill stiffness and damping properties. These properties are defined by minimising the difference between computed and recorded acceleration response spectra at the landfill top. The identified stiffness properties are found to be near the lower bound of those documented through geophysical measurements. Identified damping of about 5% (at resonance) is within the range of earlier investigations. Comparisons of the computed and recorded accelerations show: (ⅰ) effectiveness of a linear viscous shear beam model in simulating the landfill dynamic behaviour, for the recorded small to moderate levels of dynamic excitation (up to 0.26 g peak lateral acceleration), and (ⅱ) potential of the employed system identification procedure for analysis of input-output seismic motions.
机译：评估垃圾填埋场的地震响应需要可靠的动态材料特性。在过去的十年中，已经进行了地球物理调查和计算研究，以调查南加州Operating Industries，Inc.（OII）垃圾填埋场的地震响应。本文对现有研究成果进行了调查和总结。此外，还对六个地震期间的一组OII输入输出地震记录进行了全面分析。进行光谱分析以了解垃圾填埋场的动态响应特性。发现一个简单的剪切梁模型对于建模垃圾填埋场的共振行为很有用。系统识别技术用于估计垃圾填埋场的刚度和阻尼特性。通过最小化垃圾填埋场顶部的计算和记录的加速度响应谱之间的差异来定义这些属性。发现所识别的刚度性质接近通过地球物理测量所记录的刚度性质的下限。大约5％的阻尼（在共振时）在较早的研究范围内。计算和记录的加速度的比较显示：（ⅰ）线性粘性剪切梁模型在模拟填埋场动态行为方面的有效性，对于记录的中小水平的动态激励（最大横向加速度为0.26 g），和（ⅱ ）采用系统识别程序分析输入输出地震运动的潜力。

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