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    AN DISCUSSION ON CONTEMPORARY METHOD OF THE HORIZONTALLY SESSMIC LOAD
    关于现行水平地震荷载的修正方法的探讨
短句来源
    QUANTITATIVE RELATIONSHIP BETWEEN BAROMETRIC EFFICIENCY OF WELL-WATER LEVEL AND PRECIPITATION LOAD EFFICIENCY
    水井水位的气压效率和降水荷载效率之间的定量关系
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    THE EARTHQUAKE EXCITATION EFFECT OF CITY GRAVITY LOAD
    城市重力荷载对地震的激发作用
短句来源
    ON COMBINATION OF SEISMIC EFFECT AND WIND LOAD
    地震作用与风荷载的组合问题
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    A Mathematical Model on Long term Deformation of the Remolded Soil under Dynamic Load
    重塑土在循环荷载作用下长期变形之数学模型
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  “荷载”译为未确定词的双语例句
    Study on Deformation Charicteristics and Stability of Bedding Slope under Earthquake
    地震荷载作用下顺层岩体边坡变形特征及稳定性研究
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    STUDIES ON INFLUENCE OF DEEP CRACKS ON SLOPE STABILITY ON LEFT BANK OF A HYDROPOWER STATION BY FLAC 3D
    某水电站左岸深裂缝对工程荷载下边坡稳定性影响的FLAC~(3D)分析
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    ANALYSIS OF ZIGZAG CRACKS IN ROCK-LIKE MATERIALS UNDER COMPRESSION
    压荷载下类岩石材料中的锯齿形裂纹分析
短句来源
    FLAC~(3D) Simulation for Dynamic Response of Rock Slope under Explosion
    爆破荷载作用下岩石边坡动态响应的FLAC~(3D)模拟研究
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    Settlement Calculation to Reduce Settlements of Pile Foundations under Embankment
    路堤荷载下减少沉降桩基的沉降计算
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  load
Compounds Ia-Ih were hydrogenated with Pd-C to give IIa-IIh, and their hypoglycemic activity was evaluated with a glucose oxidase kit and insulin load test on normal mice.
      
A complex load shading parameter is set up to describe various load shading schemes.
      
The imaginary part of the load shading parameter describes the states of switches of load shading schemes while the real part is the corresponding amount of shaded load.
      
The procedure to search the operation with the least amount of shaded load for a feeder and a connected domain are detailed.
      
Results of analysis show that the direct load shading scheme under the most balanced topology is not always the optimal scheme.
      
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The problem of investigating the vibration properties of continuous girders on elastic piers frequently occurs in practical design work. An approximate method of attack is to replace the elastic pier by a spring support. This method simplifies greatly the analysis and is generally adopted in practice. In the first part of this paper, this approximate method is investigated in detail and complete solutions including the effect of initial conditions are given. The computations are made more systematic and simple...

The problem of investigating the vibration properties of continuous girders on elastic piers frequently occurs in practical design work. An approximate method of attack is to replace the elastic pier by a spring support. This method simplifies greatly the analysis and is generally adopted in practice. In the first part of this paper, this approximate method is investigated in detail and complete solutions including the effect of initial conditions are given. The computations are made more systematic and simple by the adoption of a system of constants defined as the dynamic shape constants and load constants of the structure. In the second part of this paper, the more accurate method of analysis is investigated. The exact frequency equations of the system are obtained by writing down the dynamic equations of the girders and the piers simultaneously and the boundary conditions are taken into consideration. It is shown that by taking only the fist one or two terms of the series expansions, the exact frequency equation reduces to the approximate one. It is concluded that the approximate method will give adequate solutions in the case when the piers are rigid and when only the lower frequencies of the natural mode need be considered. Particular solutions of structures under transverse vibrations are worked out and is found more involved than that given by the approximate method.

本文所謂架空結構是指搁置在較高的支墩上的連續梁結構,例如高架橋梁或水電站的架空輸水管道等。這類結構在承受震動荷載(例如地震)時,常會引起較大的變形和应力。如支墩較粗矮,則在計算較低的頻率時,其作用可近似的以一彈簧支座代替之,而忽略支墩本身的結構震動影響。這是一個常用的假定,可以使計算工作充分簡化。本文首先對這一情况作了詳盡討論,給出较完整的解答,包括起始條件影響在内,並提出用“載常數”及“形常數”的觀念來進行計算。然后本文給出考虑支墩的震動影響時的精確解答,分別就縱横方向的震動進行討論,並指出近似計算公式和精確公式间的關係,近似公式只能在支墩較剛固和計算较低階的頻率時才適用。文中列出了結構作横向諧和震動時的特別解答,可見其計算工作量將比近似法增加不少。

Through the use of approximate expessions in the form of quadratic equations for the sum as well as the difference of principal stresses along any definite vertical line in foundation soil subjected to triangular and trapezoidal loading due to earth embankments. the author has derived formulas for critical load corresponding to the condition that plastic zone developed it tangential to the vertical line under consideration. Based on studies of the developed plastic zones in the foundation soil due to such a...

Through the use of approximate expessions in the form of quadratic equations for the sum as well as the difference of principal stresses along any definite vertical line in foundation soil subjected to triangular and trapezoidal loading due to earth embankments. the author has derived formulas for critical load corresponding to the condition that plastic zone developed it tangential to the vertical line under consideration. Based on studies of the developed plastic zones in the foundation soil due to such a triangular and trapezoidal loading. it is proposed, that the criterion for determining the critical load on the foundation roil is that the developed plastic zone is tangential to a vertical line at one quater base width from the center line. Special considerations are given to the cases for convenient soil as well at for saturated clay of zero degree of consolidation. Charts convenient for pratical use are also prepared. Finally, numerical examples are presented which show that the proposed formulas are quite in conformity with field observations in engineering practice.

作者以二次方程代替在路堤及土坝的三角形与梯形荷载下地基中沿各铅垂线上的主应力和与主应力差的表示式,得出了相应于塑性区发展至与各指定的铅垂线相切的临界荷载公式.在比较全面地研究了三角形与梯形荷载下特有的塑性区发展规律的基础上,提出了以塑性区与铅垂线X=B/4相切作为确定的基的许可荷载的临界条件.文中还就无粘性土以及固结度为零的饱和粘土的临界荷载问题进行专门的讨论,给出了便于实际应用的图表. 最后举出的两个实际工程例子验证了本文提出的理论与实践的一致性.

After the filling up of the Xinfengjiang Reservoir, Guangdong Province, seismi-eity was greatly increased. The majority of earthquakes occurred in the deep water gorge close to the dam, concentrated within a north-west belt. They are of shallow focal depths. A strong earthquake with magnitude 6.1 took place on March 19, 1962, about two and a half years since the impounding of the reservoir.According to the results of analysis of data from geodetic leveling and the spectra of seismic waves, the fault parameters...

After the filling up of the Xinfengjiang Reservoir, Guangdong Province, seismi-eity was greatly increased. The majority of earthquakes occurred in the deep water gorge close to the dam, concentrated within a north-west belt. They are of shallow focal depths. A strong earthquake with magnitude 6.1 took place on March 19, 1962, about two and a half years since the impounding of the reservoir.According to the results of analysis of data from geodetic leveling and the spectra of seismic waves, the fault parameters of the main shock were determined. The fault plane solutions of 150 small earthquakes, occurring within a period of 18 months before and after the main shock have been obtained from the amplitudes of the first motion of P wave. The directions of the earthquake generating stress of about 2000 small earthquakes were determined by smoothing the first motion patterns. Displacement field and stress field in the rock bodies underneath the reservoir caused by the load-ing of the reservoir water have been calculated.. Variations of the velocity ratio of the P and S waves prior to the main shock and several strong aftershocks were ana-lysed.In consideration of the seismicity as well as the geological background, we endeavour to discuss the cause of reservoir impounding earthquakes at Xinfengjiang. We have the opinion that the penetration of water along fissures becomes the most important factor causing the main shock of March 19, 1962 at Xinfengjiang.

广东省新丰江水库蓄水后地震活动性有很大增高,大部分地震发生在大坝附近的深水峡谷区,形成一条北西方向的密集带,震源深度极浅,随后,在蓄水后约二年半于1962年3月19日发生了6.1级强地震。 根据水准测量与地震波波谱资料的分析确定了主震的断层参数;用P波初动振幅确定了主震前后18个月内150次小地震的断层面解,用平滑P波初动图案求得了2000余次小地震的发震应力方向;计算了水库荷载在库基岩体中产生的位移场和应力场;分析了主震及其几个大余震前的地震纵波与横波的速度比变化情况。 结合地震活动性和地质背景初步讨论了新丰江水库地震的诱发机制,认为:水的渗透作用是诱发这次地震的主要原因。

 
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