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soil spring     
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  土壤弹簧
     This paper introduces the modeling of the vertical pile response from time-domain wave equation analysis with the soil spring constants derived from t-z and Q-z curves and the time-dependent damping coefficients obtained from the dynamic impedance functions.
     本文以不同土壤弹簧和依时性阻尼系数 ,配合波动方程有限差分解仿真基桩反应。 由t-z和Q-z曲线方程式所推求的弹性土层弹簧系数和依据三维波传递动力阻抗函数所建立之转换阻尼 ,可仿真桩载重反应。
短句来源
  土弹簧
     In this paper, finite element methodis adopted. Under the pit plane, soil action is looked as soil spring acted onpile body.
     本文采用有限元的分析方法,在基坑开挖面以下,按弹性地基梁进行计算,将土的作用看作土弹簧作用于桩体上;
短句来源
     At cooperating work state, for the sake of accurately reflecting forceand distortion of pile body, this paper considers several problems as followed. Under thepit, pile locating in the passive soil pressure preferably operates with soil, which accordelastic foundation beam theory, so soil pressure is simulated as soil spring throwing onthe piles.
     为了较精确地反映出协同作用下桩体的受力和变形状况,文中考虑了以下几个方面的问题:对于基坑开挖面以下位于被动土压力区的支护桩,因为其与土的共同作用机理较好的符合弹性地基梁的工作机理,因此将土的作用模拟为土弹簧作用于桩上;
短句来源
     And the effects of the retaining wall stiffness, strut stiffness, perforce and soil spring stiffness on the internal force and deformation of the retaining structures.
     同时,论文还分别分析了围护桩墙刚度、支撑刚度、支撑预加轴力以及被动区土弹簧刚度对围护结构内力和变形的影响。
短句来源
     1. The traditional plane computing method and traditional elastic footing beam method are modified. One-way soil spring is adopted to carry out 3D anlysis for the retaining and protecting structure.
     1.改进传统的平面计算方法,对传统的弹性地基梁法进行改进,增加了只压土弹簧,使其适应于基坑支护结构的三维空间分析;
短句来源
     and the value of soil pressure,the influence of brace pressure and the selection of soil spring model are inquired into.
     并对土压力取值 ,支撑预压力的影响及土弹簧模型的选择进行探讨。
短句来源
  土层弹簧
     This paper introduces the modeling of the vertical pile response from time-domain wave equation analysis with the soil spring constants derived from t-z and Q-z curves and the time-dependent damping coefficients obtained from the dynamic impedance functions.
     本文以不同土壤弹簧和依时性阻尼系数 ,配合波动方程有限差分解仿真基桩反应。 由t-z和Q-z曲线方程式所推求的弹性土层弹簧系数和依据三维波传递动力阻抗函数所建立之转换阻尼 ,可仿真桩载重反应。
短句来源
     By correcting the soil spring constant, the model can be used to obtain the design curves of pile displacements and to match the experimental data of in situ pile load tests.
     透过土层弹簧系数修正 ,该项分析模式可仿真桩设计位移曲线和现场桩载重试验数据。
短句来源
  “soil spring”译为未确定词的双语例句
     Effect of long term foliage dressing rare earth elements (REEs) on their distribution,accumulation and translocation in soil spring wheat system.
     长期喷施稀土对土壤-植物(小麦)系统中稀土元素分布、累积及运移的影响
短句来源
     This paper, in the light of construction charactristics of Dapu road tunnel acrossing the Huangpu river in Shanghai,puts forword an analysis method by use of plate element to simulate tunnel lining,lane plate and vertical brace,and of soil spring to simulate interaction between soil and tunnel.
     针对上海市打浦路越江隧道的施工特点 ,提出用板单元模拟隧道衬砌、车道板和竖向支撑 ,用土弹簧模拟土与隧道的共同作用。
短句来源
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  soil spring
When soil spring stiffnesses were changed, the maximum column displacements varied for all three bridges.
      
When soil spring stiffnesses were changed, the maximum column displacements were noticeably different for all three bridges.
      
The soil-structure-interaction study revealed that each bridge responded uniquely to variations in soil spring stiffnesses.
      
The soil-structure-interaction study revealed that each bridge responded differently to variations in soil spring stiffnesses.
      
The properties of the soil spring are dependent on the soil properties at the site.
      
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According to the analytic results of field dynamic test of the new Luan-river bridge, the simplified mechanical model for calculating the earthquakeresponse of beam bridge structure is established with lumped masses and equi-valent soil-spring system. This system is modeled after the resisting force ofsoil layers under the ground. Taking account of the paramaters β(from theNewmark-βmethod) and θ(from the wilson-θ method), an improved numericalanalysis procedure is derived in this paper, and a complete...

According to the analytic results of field dynamic test of the new Luan-river bridge, the simplified mechanical model for calculating the earthquakeresponse of beam bridge structure is established with lumped masses and equi-valent soil-spring system. This system is modeled after the resisting force ofsoil layers under the ground. Taking account of the paramaters β(from theNewmark-βmethod) and θ(from the wilson-θ method), an improved numericalanalysis procedure is derived in this paper, and a complete program is thusdeveloped. A sketch of the old Luan-river bridge structure after the earthquake disa-ster is given, and the break-mechanism of this structure and some of the rela-ted problems in the analysis are also discussed.

本文根据新滦河桥测试的分析结果,建立了梁桥结构地震反应计算的力学图式(采用堆聚质量和等效土弹簧体系),并提出了引入参数β(取自New-mark-β法)和θ(取自Wilson-θ法)的改进拟静力方程求数值解。编制了计算程序。对老滦河桥作非线性地震反应分析,并计论其震害原因。

In this paper earthquake accelerograms are used to analyse buried pipeline responses to seismic wave-propagation and results are compared with those of manual methods in which harmonic waves are used. The effects of soil properties. pipeline-soil slippage and wave propagation Velocity are also investigated. Several conclusions are drawn as following. 1. The dominant period of the axial pipe strain is approximately equal to that of velocity wave, not that of acceleration wave.So,when harmonic wave is used in...

In this paper earthquake accelerograms are used to analyse buried pipeline responses to seismic wave-propagation and results are compared with those of manual methods in which harmonic waves are used. The effects of soil properties. pipeline-soil slippage and wave propagation Velocity are also investigated. Several conclusions are drawn as following. 1. The dominant period of the axial pipe strain is approximately equal to that of velocity wave, not that of acceleration wave.So,when harmonic wave is used in pipeline strain calculation, the dominant period of velocity wave should be used instead of that of acceleration as proposed by some authors. 2. The effects of slippage between pipe and soil on pips strains and displacements depend on the amplitute of ground displacement and the maximum elastic relative displacement of soil spring. 3. When the ground displacement is small and there is no slippage on most of the pipe segment, the effects of the relative displacement between pipe and soil is negligible and therefore the pipe strain is almost the same as the seismic ground strain. 4. When the ground displacement is very large and slippage occuis extensively, the effects of soil properties on the pipe responses mainly depend on the pipeline-soil frictional force. The effects of slippage on relative displacement between pipe and soil is significant even if the ground displacement is relatively small.

本文利用有限元方法,输入地震波,对埋设管线在地震行波作用下反应作分析,研究了十弹簧刚度、管土间的滑移、波速等多种因素对反应的影响,与现行的简化方法进行比较,指出其中存在的问题,并提出某些改进建议。

Ia this paper, jacket platforms coupled with the surrounding water, soil and piles are idealized as 3D multi-level substructure models. The nonlinear stiffness and damping of the soil springs are linearized iteratively with the Krylov-Bogoliubov method. And the nonlinear drag forces in the Morion's formula are linearized iteratively with Borgman's assumption as the initial approximation. A multi-level reduction technique is applied to the linear parts of the platforms. And the dynamic modification...

Ia this paper, jacket platforms coupled with the surrounding water, soil and piles are idealized as 3D multi-level substructure models. The nonlinear stiffness and damping of the soil springs are linearized iteratively with the Krylov-Bogoliubov method. And the nonlinear drag forces in the Morion's formula are linearized iteratively with Borgman's assumption as the initial approximation. A multi-level reduction technique is applied to the linear parts of the platforms. And the dynamic modification is introduced into the highest level linear substructure.In the reanalyses,the modification is done only for the nonlinear stiffness and damping coefficients of the soil springs. A greatly reduced random response equation is solved in terms of a deterministic algorithm newly developed. The given examples show that the present method is both efficent and accurate.

本文将桩基平台理想化为三维多级子结构模型。采用Krylov和Bogoliubov提出的方法将非线性土壤弹簧线性化。由广义Morison公式引入的拖曳力中的速度非线性项亦通过逐次迭代予以线性化。对线性的平台结构部分采用逐级凝聚,对最高级线性子结构模式则采用了动态修正。在每次重分析中只须对非线性的土壤刚度及阻尼进行修正,然后求解一个大大降阶的随机响应方程。计算实例表明,本文的处理方法具有良好的计算效率与精度。

 
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