1) near-fault earthquake
近场地震
1.
A near-fault earthquake usually has the features of larger value of parameter PGV/PGA and obvious velocity pulse.
近场地震以具有较大的PGV/PGA值及明显的速度脉冲为主要特征,本文分析了不同类型的近场地震对深水桥墩地震响应的影响;采用Morison方程的基本理论,将水视为附加质量,利用有限元方法来分析动水压力对深水桥墩地震响应的影响。
2.
The elastic displacement design spectrum compatible with the spectrum of dynamical amplification factor in the UBC97 code is calculated, and using the strength-reduction factor obtained from the regression analysis of 387 near-fault earthquake records, the non-linear displacement design spectrum based on structural damage performance is also establisked.
用387条近场地震记录通过回归分析得到了强度折减系数, 计算了与美国UBC97规范动力放大系数谱相容的弹性位移设计谱, 并建立了相应的基于结构破坏性能的非弹性位移设计谱。
2) near-field earthquake
近场地震
1.
Damage mechanism of frame structures under action of near-field earthquake;
近场地震作用下框架结构的损伤机理
3) near field seismology
近场地震学
4) near-field ground motion
近场地震动
1.
Suitability analysis of ground motion attenuation relation in estimation of near-field ground motion for small and moderate earthquakes;
中小震近场地震动估计中地震动衰减关系的适用性分析
2.
We first review several parameter indices that are used to measure the damage potentials of near-field ground motions from a new point different with traditional approach.
从一个异于传统研究方法的角度出发,利用最近发展的地震动 3D 瞬态参数分析理论,有选择的研究了有关近场地震动记录的3D 瞬态特征;通过对典型近场地震动作用下结构模型的算例分析,探讨了速度脉冲型地震动与结构延性需求之间的关系,指出结构坏固然与地震动的反复作用有关,但对于大多数结构的关键破坏起控制作用的却可以归因于近场地震动的脉冲特性,这对认识结构破坏的根本原因具有重要意义。
3.
The characteristics of displacement ratio spectra for near-field ground motions are investigated based on a great number of earthquake ground motions.
以大量的地震动记录为基础,研究近场脉冲型地震动位移比谱的特征,同时考察场地条件、峰值地面速度与峰值地面加速度比(PGV/PGA)、峰值地面速度(PGV)和最大增量速度(MIV)对近场地震动位移比谱的影响。
5) near-field seismic waves
近场地震波
1.
Analysis of the impulsive component of the near-field seismic waves using moving Fourier spectral analysis method;
用移动富氏谱分析近场地震波的脉冲成分
6) Near-field ground motions
近场地震动
1.
In this paper,Kanai-Tajimi model and He-Agrawal velocity pulse model are selected to conduct the nonlinear numerical simula- tion of several typical near-filed records,and many near-field ground motions are obtained by adjusting the ratio of random broadband com- ponent and pulse component.
选用宽频远场地震Kanai-Tajimi模型与He-Agrawal近场脉冲地震速度脉冲模型,对现有的典型近场地震记录进行非线性数值拟合,调整其脉冲分量与宽频分量的比值,得到不同脉冲分量的地震波;文中以一幢8层基础隔震结构为研究对象,分析了合成近场地震波下基础隔震结构的水平及转动动力响应,结果表明含有脉冲分量的近场地震动比远场地震动破坏力更大;基础隔震体系能有效地减小上部结构在近场地震动中的响应。
补充资料：近场
见声场。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条