The motion behavior at the interface of pile soil under seismic loading was analyzed , and its influence on the displacement response of pile footing and superstructure was also discussed 利用这一模型，分析了地震作用下桩土交界面处的动力反应形态，探讨了桩土间的接触非线性及其对桥梁结构地震反应的影响。
Because of low height of building , small size of section , the rigidity of double - prestress ultra - thin composite structure is relatively low and is comparatively sensitive to motive force of vehicles 二次预应力超薄梁组合结构因其建筑高度低，截面尺寸小，刚度相对常规梁要低，在车辆作用下动力反应较为敏感。
On the other hand , the calculation on difference earthquake wave show : the spectrum of earthquake wave will affect dynamic property of structure like long period of xiao wan dam 另外，不同性质的地震动输入所得的计算结果表明，地震波的频谱特性对于小湾大坝这样的长周期结构的动力反应特别是位移反应有明显的影响。
Based on these solutions , a parametric study is conducted to determine the main features of the soil - pile system vibration , and the special influence of viscous damping of soil layer around pile is discussed 基于所得解对桩土动力耦合作用的内在机理、粘弹性土层动力反应特性进行了分析，并重点讨论了桩侧土不同形式材料阻尼对桩顶动力响应的影响。
Chinese design code differs from all other countries " in some aspects . the measures mentioned above mostly rely on experience and lack the systemic calculational result of inelastic dynamic analysis of structure 但中国国家设计标准与世界各国的做法存在一定的差别，上述操作方法的经验判断成分较重，缺乏系统的结构非线性动力反应分析结果作为依据。
The result of the study included two aspect : one is the affection when hollow opened and pier on arch - dam with statics calculation , earthquake response spectrum analysis and analysis of time - history i . e step - by - step integration analysis 本文完成的主要工作有两个方面：一是通过静力分析、反应谱分析和时程分析研究坝身开孔及闸墩对坝体整体动力反应的影响。
Through mode analysis , dynamic characteristics under different intension earthquake is studied . according to dynamic characteristics and responses of the structure in each phase , the seismic behavior of the structure is analyzed 通过模态分析研究了结构在不同强度的地震作用前后的动力特性，根据各阶段结构的动力特性和动力反应，分析判断结构和构件的抗震性能。
It is also necessary to verify by nonlinear dynamic analysis whether the measures above are effective and whether the anticipative earthquake - resistance aims can be achievable for frames in 7 . 5 and 8 . 5 regions 上述抗震措施对结构抗震是否有效，按照新规范设计的7度半、 8度半结构在地震作用下能否达到规范预期的抗震设防目标，也有必要通过非线性动力反应分析来予以检验。
The characteristic and applicability of the models are studied by computer simulation . the influence of the skeleton curves and the hysteretic curves of the models to the simulate curves are analyzed . and the stress - strain relations of the models are compared 最后采用模拟效果较好的三个模型（ mander模型、 park模型及sheikh模型）对八度区框架结构进行了中震及大震下动力反应分析。
However , from the point of view of development , for dynamical response of large dam and three - dimensions bodies , movation solution which is more efficient , more accurate and explicitly decoupled should be used . it is a tendency of future 但从发展的角度看，对于大型坝体的动力反应分析或三维问题，应采用计算效率和精度更高的显式解耦的波动数值求解技术，这应该是未来发展趋势所在。
