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strong motion     
相关语句
  强震
     Process of strong motion accelerograph recording of Tianzhu M_L 4.4 earthquake on July 7, 2001
     2001年7月7日天祝M_L4.4地震强震仪记录资料处理
短句来源
     STRONG MOTION RECORDS AND PRELIMINARY ANALYSIS FOR MINLE-SHANDAN M_S6.1 EARTHQUAKE ON OCT.25,2003,GANSU PROVINCE
     2003年10月25日甘肃省民乐-山丹M_S6.1地震强震近场记录和分析
短句来源
     ANALYSIS ON RECORDS OF STRONG MOTION ACCELEROGRAPH IN YUMEN M_L4.5 EARTHQUAKE ON DEC.17,2002
     2002年12月17日玉门M_L4.5地震的强震仪多条记录资料分析
短句来源
     Remote access of the K2 type digital strong motion seismograph
     K2数字强震仪的远程访问
短句来源
     STRONG MOTION OBSERVATION AND ANALYSIS OF JIASHI, XINJIANG, M_S5.4 EARTHQUAKE ON JANUARY 4, 2003
     2003年1月4日新疆伽师5.4级地震的强震观测与分析
短句来源
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  强震动
     APPLICATION OF THE STRONG MOTION OBSERVATION
     强震动观测的应用
短句来源
     Strong motion observation is an important basis of earthquake disaster prevention and earthquake emergency response.
     强震动观测是震灾预防与地震应急的重要基础。
短句来源
     The study situation of strong motion observation and structural seismic response observation is summarized.
     概述了国内外强震动观测的研究现状和结构地震反应观测台阵的研究情况。
短句来源
     Prospect of strong motion observation in China
     中国强震动观测展望
短句来源
     Strong Motion Observation in Chinese Continent
     中国大陆的强震动观测
短句来源
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  强运动
     Estimation of rapture propagation direction and strong motion generation area from azimuth and distance dependence of source amplitude spectra
     从震源振幅谱随方位角和距离的变化估计破裂传播方向和强运动发生区
短句来源
     By analyzing the characteristics of the earthquake motion, the conclusions were drawn: (1) the performance of the GDQJ1A strong motion seismograph is fine;
     初步分析这次强地震运动特性,得出两点结论:(1)强运动记录检验了投入使用的GDQJ-1A型仪器性能良好;
短句来源
  强震动观测
     APPLICATION OF THE STRONG MOTION OBSERVATION
     强震动观测的应用
短句来源
     Strong motion observation is an important basis of earthquake disaster prevention and earthquake emergency response.
     强震动观测是震灾预防与地震应急的重要基础。
短句来源
     The study situation of strong motion observation and structural seismic response observation is summarized.
     概述了国内外强震动观测的研究现状和结构地震反应观测台阵的研究情况。
短句来源
     Prospect of strong motion observation in China
     中国强震动观测展望
短句来源
     Strong Motion Observation in Chinese Continent
     中国大陆的强震动观测
短句来源
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      strong motion
    Four recently developed attenuation models are calibrated by using a very limited amount of strong motion data recorded in China.
          
    It is shown that the predicted near-fault ground motion field exhibits similar characteristics to those observed in strong motion records, such as the hanging wall effect, vertical effect, fling step effect and velocity pulse effect, etc.
          
    To investigate such effects, a 1/4 scaled circular reinforced concrete bridge column specimen was tested under two horizontal and one vertical components of a strong motion that has long duration with several strong pulses.
          
    Studying strong motion records and the spatial distribution of ground shaking is of great importance in understanding the underlying causes of damage in earthquakes.
          
    A nonstationary stochastic process with frequency and amplitude modulation is used to represent the earthquake strong motion and an equivalent linearization technique is used to account for the nonlinear damping force in the TLCD.
          
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    In this paper, a survey is made over the existing theories of seismic forces onstructures. It is found that all the theories fall into one of the following cate-gories: 1) the so-called "statical theory" which considers the structure subject toan equivalent constant acceleration; 2) theories based upon simulated simplified ground motions; 3) theories based upon recorded actual ground motions; 4) theories based upon random impulses. Critical comments have been given to the above theories, especially to thefourth...

    In this paper, a survey is made over the existing theories of seismic forces onstructures. It is found that all the theories fall into one of the following cate-gories: 1) the so-called "statical theory" which considers the structure subject toan equivalent constant acceleration; 2) theories based upon simulated simplified ground motions; 3) theories based upon recorded actual ground motions; 4) theories based upon random impulses. Critical comments have been given to the above theories, especially to thefourth one. The writer further gives a brief but cpmplete description of the responsespectra of the structure and on this basis, all the theories are co-related. Computations made by G. W. Housner for major American earthquakes dis-close that the acceleration spectra for damped system are flat curves withoutoutstanding peak value. For this reason, the writer deems that for certain typeof structures, variation of the acceleration spectral value for different modes of vibration will be small, and may be taken approximately as a constant. As aresult, the seismic forces reduce to this constant spectral acceleration times the.mass of the structure. It is suggested to use this method for estimatingthe base shear but make proper adjustment in its distribution along the height ofthe structure. It is also proposed to tie up this spectral acceleration to the earth-quake intensity scale. Finally, the writer stresses that further development of the theory of seismicforces on structures depends upon researches along following lings: 1) strong-motion program; 2) dynamical properties of structures and materials; 3) effectsof foundation conditions; 4) vertical and torsional seismic forces; 5) co-relationbetween seismic forces and earthquake intensity.

    本文回顾了关于建筑物地震力的理论的发展过程,对于现行的几种理论进行了评论;认为在我国目前条件之下,可以采用一种基于动力原则的地震力系数;最后对今后的研究方向提供了一些意见。

    The quintuple strong motion seismograph may record three-component ground displacements with mechanical lever amplification, visible recording and triggering without the loss of the first motion of the earthquake waves, preserving wave forms 20 seconds before triggering.The parameters of the instrument are: T 5.00 sec, D 0.550, V 5.00. Its zero point drift is smaller (< 0.1mm/℃), frequency band wider. It may record local and near earthquakes of magnitude greater than five.During the past two years,...

    The quintuple strong motion seismograph may record three-component ground displacements with mechanical lever amplification, visible recording and triggering without the loss of the first motion of the earthquake waves, preserving wave forms 20 seconds before triggering.The parameters of the instrument are: T 5.00 sec, D 0.550, V 5.00. Its zero point drift is smaller (< 0.1mm/℃), frequency band wider. It may record local and near earthquakes of magnitude greater than five.During the past two years, the instrument recorded eight moderate earthquakes, rather satisfactorily.

    五倍强震仪是记录三分向地动位移的仪器,直接机械杠杆放大,可见记录,触发但不丢地震初动,能保留触发前20秒内的波形. 仪器参数是:T5.00秒,D0.550,V5.00.零点漂移小(<0.1毫米/℃),频带较宽,可记录5级以上的地方震和近震. 两年来,八次中强震记录表明仪器性能良好.可供台站仪器配套和现场记录强余震用.

    Based on the characteristics of earthquake simulation test,a concept of fluid dispensation coefficient is developed through the analysis of typical strong motion velocity records.The paper shows that it is rational to apply the fluid source of large-scale accumulator in the vibration table and presents a new approach to determine the amount of dispense of fluid in the fluid source.

    本文针对地震模拟试验的特点,通过对具有代表性的强震地震速度记录的分析,建立了油源供油量系数的概念。文中指出了大型储能器油源用于地震模拟振动台的合理性并提出了确定电液地震模拟振动台油源供油量的一个新途径。

     
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