地震地面运动被模拟成随机过程。
Earthquake ground motions are modeled as stochastic processes.
埋藏基岩凹陷地形的地震地面运动反应与震害异常带有成因上的联系。
There is a genetic relationship between the underlying bedrock depression and earthquake ground motion responses.
地震地面运动的空间变化效应(特别是行波效应)对大跨度结构的响应有很大影响。
The spatially varying effects of the ground motions especially the traveling wave effect, have great influences on the dynamic responses of long-span structures.
因此采用能反映时频非平稳特性的时变谱密度(即局部谱密度)来描述地震地面运动是非常必要的。
Consequently, it is necessary to describe earthquake ground motion with local spectral density, which is time-dependent and can reflect the non-stationary characteristics.
地震地面运动功率谱模型采用两次过滤白噪声模型，建立了地震地面运动谱强度与最大加速度均值之间的关系。
Its power spectral model is the twice-filtered white noise model. Moreover, the relation between the power spectral intensity and the mean value of maximum ground acceleration is set up.
本文从强震持时、频谱特性和能量分布峰态系数等三个方面对地震地面运动规律进行综合分析，提出了一种较为客观的地震地面运动分类方法。
In this paper, the law of earthquake ground motion is analyzed comprehensively by taking account of duration, frequency characteristic and peak index of energy distribution.
这些因素包括：大坝的重要性，地震时地面运动的程度，大坝出现或没有出现重大损坏，以及在当地或附近发生强震时大坝质量的可靠性。
These factors include importance of the dam, severity of the ground motion, occurrence or lack of observed damage, and availability of quality strong motion records at or near the dam.
地震所引起的地面振动是一种复杂的运动，它是由纵波和横波共同作用的结果。
Caused by the earthquake ground vibration is a complex exercise, it is by the P-wave and S-wave interaction results.
要了解有关黄石公园的火山过去的内容，并查看有关地震的最新数据，地面运动和水流，请访问钒酸钇网站。
To learn more about Yellowstone's volcanic past and to view current data about earthquakes, ground movement, and stream flow, visit the YVO website at.
在纯粹地震学中，地面运动一般以振幅表示。
In pure seismology, the ground motion is generally expressed by its amplitude.
研究结果还表明用地面运动峰值参数估算地震应力降是一种新的实用性较强的方法。
The results of this study also show that estimation of seismic stress drop from the peak parameters of ground motion will become a new practical method.
居住在地震多发地区的人们应该建造能够抵抗地面运动的房屋。
People who live in the areas where earthquakes are a common occurrence should build houses that are resistant to ground movement.
液化土层对地面运动及结构地震反应的影响是工程抗震领域中非常重要的课题之一。
The study on effects of liquefied zone on surface ground motion and seismic response of buildings is one of the very important subjects in the engineering of earthquake-resistance of structure.
地震作用下计算机模拟分析的准确性除输入地面运动的因素外，主要取决于分析模型和材料模型的合理性。
Besides the factor of ground motion, the accuracy of the simulation is depended on the rationality of analytic model and material model.
首先研究了SDOF系统参数和地面运动参数对弹性地震输入能量谱的影响。
The influence parameters, including the parameters of the SDOF systems and the ground motions, on the input energy spectrum are investigated.
本文根据广东沙环核电厂厂址地震地质环境特点和有关核法规的技术要求完成了设计地面运动时程的人工合成。
The design ground motion time histories was synthesized for the Shahuan Nuclear Power Plant Site according to the characteristics of the site and the specifications of input motion in the paper.
研究了在质量偏心和双向地面运动情况下结构从弹性、开裂、屈服直至破坏等各阶段的地震反应。
The dynamic responses of the models with mass eccentricity and under the condition of bi-directional ground motion were studied at the elastic stage and stages of cracking, yielding and failure.
地震仪是提供地面运动的连续记录。
A seismograph is an instrument which gives a continuous record of the motion of the ground.
提出了一种根据地震后的结构所呈现的破坏状态，运用结构破坏反演技术来确定地面运动参数的新方法。
A new method of determining ground motion parameters according to the destruction state of structure after earthquake, which using the inverse technology, is raised.
摘要：地震现场特征需要大量的地面运动记录，但很少有这样可用的数据集。
Seismic site characterization requires large numbers of ground‐motion records, and such data sets are rarely available.
计算结果与均匀半空间自由场做了对比，以说明竖向地裂缝对地震波传播和附近地面运动的影响。
Compared with the seismic responses of free homogeneous half space, the results present the effect of vertical cracks on the propagation of seismic wave and the ground motion near the fault site.
振动图是用来记录地面随时间运动并且是地震学家用来研究地震波的基础数据。
Seismograms are recordings of ground motion as a function of time and are the basic data which seismologists use to study the waves generated by earthquakes.
本文在强震地震波频散研究的基础上，进行了强地震动场相位预测方法和多点地面运动时程合成方法的研究。
A method for predicting the phase spectra of strong ground motion is presented based on the equivalent dispersion of wave motion and the approach for synthesizing ground motions is then studied.
目的研究给水管道在地震作用下地面运动具有很大非平稳性时的可靠度。
The purpose of this paper is to study on seismic reliability of watersupply pipes under non-stationary earthquake.
文中对地面运动衰减规律中的距离参数提出了一种新的定义，即从场地到破裂线两端点的平均距离。这个定义能较好地反映发生构造地震的断层破裂模式。
A new definition of distance parameter in attenuation law of ground motion, i. e. the average distance from site to both ends of rupture line is proposed.
记录地面运动的全波场，对地震学、地震勘探学以及地震模型试验都有重要的意义。
It is a great significant for surveying the full fields seismic movement in seismology and seismic prospecting as well as model seismology.
记录地面运动的全波场，对地震学、地震勘探学以及地震模型试验都有重要的意义。
It is a great significant for surveying the full fields seismic movement in seismology and seismic prospecting as well as model seismology.
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