seismic motion

Direct measurement of seismic ascertains that fluid motion is a primary mechanism in porous, permeable elastics.

地震波衰减机制和测量方法研究表明，在孔隙和渗透性碎屑岩中，流体运动是衰减的主要机制

Furthermore, the main factors that influence the A10/ A63 ratios are found in order to be attenuation relationship of seismic ground motion, division of seismic potential source areas and seismicity parameters.

进一步研究比值A10A63，发现其主要影响因素依次为地震动衰减关系、地震区带与潜在震源区划分方案、地震活动性参数。

The analysis on ground motion response of stone arch bridge was done according to typical seismic waves in different site and specification-based artificial waves. The effects of different arch axis and rise-span ratio on seismic behavior of stone arch bridge were discussed.

针对不同场地的典型地震波和基于规范生成的人工波，对石拱桥的地震动反应进行了分析，讨论了不同拱轴线和矢跨比对石拱桥抗震性能的影响。

The parameters of random model of ground motion given in this study provide relatively reliable and accurate earthquake motion input for stochastic seismic response analysis of structures.

最后给出了规范各种工况下的地面加速度功率谱参数值，为随机抗震计算分析提供了依据。

damage assessment techniques for the structure under the seismic motion

结构在地震作用下的损伤评估方法

Time history analysis method is one of methods in seismic design of engineering structure. Code for Seismic Design of Building ( GB50011-2001) demands: two strong motion recordings are needed to choice in time history analysis method.

时程分析法是进行结构抗震计算的方法之一，《建筑抗震设计规范（GB50011-2001）》要求：在采用时程分析法时，要选用不少于两组的实际强震记录。