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首页> 外文会议>World conference on earthquake engineering;WCEE >TRANSMITTING BOUNDARIES FOR TRANSIENT ELASTICRESPONSE IN SOIL-STRUCTURE INTERACTION SYSTEM
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TRANSMITTING BOUNDARIES FOR TRANSIENT ELASTICRESPONSE IN SOIL-STRUCTURE INTERACTION SYSTEM

机译：土-结构相互作用系统中瞬态弹性响应的传递边界

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The objective of present work is to investigate the effects of various boundaries in analyzing the problemsin dynamic soil-structure interaction (SSI) system. The fixed soil boundaries in the soil structureinteraction system under seismic event, reflect the waves which are radiated outward from the excitedstructure towards infinity. A general and efficient Finite Element method through which an infinite systemmay be approximated to a finite system for the solution directly in the time domain of transient soilstructureinteraction problems is the main concern. A study has been performed here to investigate theeffectiveness of various boundaries such as viscous boundaries, transmitting boundary etc.The dynamic response of an elastic block on a homogeneous and on layered half space is studied. Theblock and the near field soil region are discretised with plane strain finite elements and far field soil regionis modeled by transmitting cone boundary in which dashpots are combined with stiffness at the boundarynodes. The SSI system is subjected to transient load of a rectangular pulse either in vertical or inhorizontal direction at top surface of the block. The displacement time history responses at the top of theblock are compared for the cases of free, fixed and transmitting boundary in graphical form . Thetransient response of SSI system is evaluated by varying the stiffness of the homogeneous soil. Theparametric studies of the SSI system under transient loads are carried out to investigate the effect ofstiffness ratio between the soil layers on transient response of the system in a layered half space. Themaximum response and the behavior of present responses are compared with that of other investigators intabular form. The response of block-soil interaction under horizontal and vertical transient load, indicatethat the present method is effective compared to other modeling methods.
机译：当前工作的目的是研究在分析动态土-结构相互作用（SSI）系统中的问题时各种边界的影响。在地震作用下，土壤结构相互作用系统中固定的土壤边界反射了从受激结构向外辐射到无限远的波。主要问题是一种通用有效的有限元方法，通过该方法可以将无限系统近似为有限系统，以便直接在瞬态土壤结构相互作用问题的时域中求解。这里已经进行了研究以研究各种边界（例如粘性边界，透射边界等）的有效性。研究了弹性块在均匀和分层半空间上的动力响应。用平面应变有限元离散该块和近场土壤区域，并通过传播锥边界模拟远场土壤区域，在该锥边界中，阻尼点与刚度在边界节点处结合。 SSI系统在模块的顶部表面垂直或水平方向承受矩形脉冲的瞬态负载。对于以图形形式表示的自由边界，固定边界和透射边界的情况，比较了块顶部的位移时程响应。通过改变均质土的刚度来评估SSI系统的瞬态响应。进行了SSI系统在瞬态载荷下的参数研究，以研究土层之间的刚度比对分层半空间中系统的瞬态响应的影响。将最大响应和当前响应的行为与其他调查员的表格形式进行比较。在水平和垂直瞬态荷载作用下块土相互作用的响应表明，与其他建模方法相比，本方法是有效的。

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