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无限地基     
相关语句
  infinite foundation
     The methods for treatment of earthquake input and modeling of radiation damping in infinite foundation were established based on cylindrical wave equation.
     其中,地震波的输入方法以及无限地基辐射阻尼的模拟方法都是在柱面波动方程的基础上建立起来的.
短句来源
     Study on Dynamic Interaction Problem of Frame Structure and Semi infinite Foundation System
     框架结构和半无限地基系统的动力相互作用问题研究
短句来源
     The calculation of the earthquake response of Longjiang Arch Dam as a case study shows that the infinite foundation radiation damping associated with wave propagation away from the dam decreases the dynamic arch cantilever stress by 40%-50% as compared with massless foundation models and results in obvious decrease of maximal principal tensile stress and maximal principal compressive stress of the dam in static and dynamic composite states under normal water storage level and dead water level.
     利用该“仿真模型”计算了龙江拱坝的地震反应,计算结果表明:考虑无限地基辐射阻尼的影响,龙江拱坝的动拱梁应力与无质量地基模型比较均有较大幅度的降低,最大降幅约在40%~50%范围内,且导致正常蓄水位和死水位条件下,大坝静动综合的最大主拉、主压应力明显降低。
短句来源
     The dynamic analysis of damfoundationreservoir system of an arch dam was performed in this paper, using a numerical model considering infinite foundation radiation damping and contraction joints' nonlinearity and freefield earthquake input. A series of calculating cases were studied with or without foundation radiation damping under different reservoir water levels.
     针对拱坝坝体-地基-水库系统的动力计算分析,采用考虑无限地基辐射阻尼、坝体横缝非线性和自由场输入的模型程序,以溪洛渡拱坝为工程实例,对不同库水位下,考虑或不考虑地基辐射阻尼的工况进行了系列的计算对比研究。
短句来源
     In this method,a finite domain was obtained by truncation of the infinite foundation,and the truncated foundation was simulated by a series of dashpots and springs along the boundaries. Then,the earthquake inputs on the boundary with incident waves were simulated with an equivalent force directly proportional to the velocity of incident waves.
     这种方法先通过对无限地基的人工截断获得有限计算域,然后沿人工边界布置一系列弹簧和阻尼器来模拟无限地基,在有入射波的边界上用与入射波速成正比的等效力来实现地震动的输入.
短句来源
更多       
  infinite medium
     The structure-soil dynamic interaction is mainly confined in frequency domain because of the difficulty of determination of dynamic effects of infinite medium on structural response, which makes most of the dynamic interaction analysis methods invalidated for nonlinear problems.
     由于无限地基的动力效应较难确定,结构-地基的动力相互作用主要局限于频域分析,从而限制了非线性分析应用。
短句来源
     Damping Extraction Method is an effective simple procedure, which can simulate the dynamic properties of non-homogeneous infinite medium by applying artificial damping and then shifting the frequency along frequency axis. Based on DSEM, it is convenient to get dynamic interaction force in time domain acting on interface between unbounded rock and structure.
     阻尼抽取法(DSEM)通过在有限域内施以附加人工阻尼再移频抽取的办法可以有效地模拟非均匀无限粘弹性介质的动力特性,在结构-无限地基动力相互作用分析中有较好的应用前景。
短句来源
     The radiation damping induced by an infinite medium has great effects on the dynamic response of underground structures,which is usually added on the nodes at the outer boundary of the structures in a simplified model.
     在地下结构地震响应的简化分析模型中,无限地基的辐射阻尼通常以附加阻尼罐的形式与结构动力刚度阵耦合在一起,其阻尼形式不同于结构阻尼或比例阻尼.
短句来源
  unbounded foundation
     DYNAMIC RESPONSE ANALYSIS OF HIGH ARCH DAMS SITED ON INHOMOGENEOUS UNBOUNDED FOUNDATION
     非均质无限地基上高拱坝的动力响应分析
短句来源
     Scaled Boundary Finite Element Method Model of Three-dimensional Unbounded Foundation of Arch Dams Based on Cone(Theory)
     基于锥体理论的三维拱坝无限地基SBFEM模型
短句来源
     Dynamic interaction between arch dam and unbounded foundation has great significance on the seismic response of dam structure.
     地震作用下拱坝-无限地基的动力相互作用将对拱坝的地震响应产生重要影响。
短句来源
     Taking advantages of the scaled boundary finite element method(SBFEM),the influence of the foundation inhomogeneity on the seismic response of high arch dams is studied. The arch dam,the unbounded foundation and the reservoir are all modeled by the SBFEM.
     利用比例边界有限元方法能够方便地模拟非均质无限域的优点,研究非均质无限地基对双曲高拱坝动力响应的影响。
短句来源
  infinite soil
     The seismic actions are usually applied to structure by transforming the seismic displacement,velocity and acceleration to external loads acting on the boundary in almost all the methods for the dynamic structure-foundation interaction analysis because of frequency-dependant feature of infinite soil impedance.
     由于无限地基动刚度的频率相关性,用于结构-地基动力相互作用分析的各种方法基本上都是将地震动作用转化为作用在边界上的力,需要同时包括地震动位移、速度和加速度输入信息.
短句来源

 

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      infinite foundation
    A method for nonlinear dynamic response analysis of semi-infinite foundation using mapping
          
    Using linear and nonlinear constitutive models, the responses of semi-infinite foundation soil are computed by the authors proposed method with a small mesh model and an extensive mesh model.
          
      infinite medium
    The stability of a jet in an infinite medium increases with increase in the viscosity of both the jet and the medium [2, 3].
          
    Unlike the cometary coma, the regolith is an optically semi-infinite medium, where the interaction between particles is significant.
          
    Mass Transfer to a Semi-infinite Medium Accompanied by Reversible Chemical Reactions
          
    A mathematical method is developed for deriving asymptotic relationships for the mass-transfer acceleration factor at the boundary of a semi-infinite medium.
          
    Statistical properties of resonance radiation selectively reflected from a cold semi-infinite medium
          
    更多          
      unbounded foundation
    Geological conditions of the dam canyon are usually very complicated; however, in the literature, the damfoundation interaction analysis is often carried out based on the premise of a homogeneous unbounded foundation.
          
    In order to satisfy the similarity requirement of SBFEM and simplify the computational effort, a subdomain approach and a conical representation of an unbounded foundation were proposed.
          
    It was found that a homogeneous idealization of the unbounded foundation may sometimes greatly underestimate the maximum earthquake stress response of the dam.
          
    Coupling with the equation of dam-unbounded foundation interaction, it can effectively carry out the earthquake response analysis of dam-reservoir-foundation system.
          
      infinite soil
    The numerical method employed is a combination of the time domain semi-analytical boundary element method (SBEM) used for the semi-infinite soil medium and the semi-analytical finite element method (SFEM) used for the three-dimensional structure.
          
    The structures are discretized by finite elements, and the infinite soil is represented by boundary elements.
          
    Because of this, the behavior of such a semi-infinite soil mass can be idealized as a one-dimensional soil column.
          


    So far,to the authors' knowledge,the application of elastoplastic soil model in the superstructure-foundation-soil interaction has not yet been worked out in China. The purpose of this paper is to study whether the elastoplastic soil model can be used or not in the interaction between silty-sand and box foundation for tall buildings in Shanghai. Now the comparison between the calculated results from incremental method and the measured results in the similar foundation soil gives sufficient proof that this model...

    So far,to the authors' knowledge,the application of elastoplastic soil model in the superstructure-foundation-soil interaction has not yet been worked out in China. The purpose of this paper is to study whether the elastoplastic soil model can be used or not in the interaction between silty-sand and box foundation for tall buildings in Shanghai. Now the comparison between the calculated results from incremental method and the measured results in the similar foundation soil gives sufficient proof that this model can be used under some simplified assumptions.The reaction forces ( contact pressures ) and foundation settlement agree reasonably with those measured in similar foundation soil.It is worth mentioning that the distribution of reaction forces is essentially different from that of elastic half space model.

    在国内,尚未见弹塑性地基模型用于研究高层建筑与地基的共同作用的报导。本文最初旨在探索上海粉砂土弹塑性模型能否用在高层建筑与地基的共同作用,经过增量法的计算结果和类似地基的实测结果相比,足以表明,该模型在一些简化假定的条件下,可以分析地基与高层建筑箱形基础的共同作用,求得的地基反力和沉降与类似地基的实测结果比较接近;本模型的地基反力分布规律与弹性半无限地基模型有本质上的区别。

    In dealing with problems of infinite foundation with tectonic faults which are extending to infinite distance, a model employing seven-node infinite element coupling with isoparametric finite element is presented. Effects of locations and strikes of faults on the stress distribution of gravity dams are studied. Great advantages of saving computer time significantly and improving accuracy are obtained by using this method to model foundation and tectonic problems.

    本文对断层在其深度方向延伸无穷远的无限地基,利用文中提出的七节点超参无穷元与等参有限元相耦合的方法进行模拟,研究了断层位置与产状对重力坝地基应力的影响。结果显示这种无穷元在模拟此类地基与构造问题上具有很大优越性,大量减省计算机时,提高了计算精度。

    In this paper the BEM based on fundamental solutions of infinte domain and semi-infinite domain is developed, which is applicable for solving problems of statical interaction between structures and semi-infinite plane base. As long as this method is adopted, elements are idealized only on the structure surface, on the base surface with side loads and on interfaces between structures and the base, and thus the effect of the entire semiinfinite base is incorporated. In comparison with the general FEM and BEM,...

    In this paper the BEM based on fundamental solutions of infinte domain and semi-infinite domain is developed, which is applicable for solving problems of statical interaction between structures and semi-infinite plane base. As long as this method is adopted, elements are idealized only on the structure surface, on the base surface with side loads and on interfaces between structures and the base, and thus the effect of the entire semiinfinite base is incorporated. In comparison with the general FEM and BEM, this method made a feature of less amount of data processed before and after computation, less internal storage and less computer time required. At the same time the accuracy is considerably improved. Various contact conditions on interfaces are discussed here. The constant body force is converted into boundary traction during the application of BEM.

    本文提出用半无限域基本解与无限域基本解相结合的边界单元法解结构与半无限平面地基的静力相互作用问题。采用本文方法,只需要在结构的表面、有边荷载的地基表面和地基与结构的交界面上剖分单元,就可以考虑整个半无限地基的影响。与一般的有限单元法、边界单元法相比,如用本文方法,计算前后的数据工作量大为降低,所需计算机内存和机时也可减少,而且精度显著提高。本文讨论了交界面上的各种接触情况。结构和地基的常体力都化为面力处理。

     
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