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首页> 外文期刊>Journal of Earthquake Engineering >VERTICAL EARTHQUAKE GROUND MOTION RECORDS: AN OVERVIEW
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VERTICAL EARTHQUAKE GROUND MOTION RECORDS: AN OVERVIEW

机译：垂直地震地面运动记录：概述

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摘要

Recent research clearly shows the importance of including the vertical component of earthquake ground motion in seismic analysis and design. In addition, pioneering studies [e.g., Elnashai and Papazoglou (1997)] have explored and documented the characteristics of available near-field vertical ground motion records. As a follow-up, this paper complements earlier studies, and investigates additional far-field records and available downhole array vertical motion records. A total of 111 free-field strong motion records (from California) and available downhole array records are employed. Compared to near-field records, far-field records generally contain more energy at longer periods. Based on the available data, response spectra are presented for near-field and far-field records respectively. The currently scarce downhole-array vertical motion records show that significant amplification may occur within the top 10-20 m soil layers. A simple one-dimensional (1D) vertical wave propagation model did not appear adequate for modelling the observed downhole array response. In using such a simplified model, very high viscous damping in the range of 15-25% was needed to match the recorded downhole vertical response, even for small tremors. Additional data and research are required [Beresnev et al., 2002] towards the development of a rational vertical motion site response analysis procedure.
机译：最近的研究清楚地表明了在地震分析和设计中包括地震地震动的垂直分量的重要性。此外，开创性研究[例如，Elnashai和Papazoglou（1997）]已经探索并记录了可用的近场垂直地面运动记录的特征。作为后续，本文补充了以前的研究，并研究了其他远场记录和可用的井下阵列垂直运动记录。总共使用了111个自由场强运动记录（来自加利福尼亚）和可用的井下阵列记录。与近场记录相比，远场记录通常在更长的时间内包含更多能量。基于可用数据，分别给出了近场和远场记录的响应谱。当前稀少的井下阵列垂直运动记录表明，在顶部10-20 m的土壤层中可能会发生明显的放大。一个简单的一维（1D）垂直波传播模型似乎不足以对观察到的井下阵列响应进行建模。在使用这种简化模型时，即使对于很小的地震，也需要非常高的粘滞阻尼在15-25％的范围内才能匹配记录的井下垂直响应。为开发合理的垂直运动部位响应分析程序，还需要其他数据和研究[Beresnev等，2002]。

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