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dam crack
相关语句
  大坝裂缝
     DESIGN AND METHOD OF DAM CRACK AND JOINT MONITORING
     大坝裂缝及接缝监测设计与监测方法
短句来源
     Construction Technique of Dam Crack Chemical Casting Construction for Huanghe Nina Water Power Station
     黄河尼那水电站大坝裂缝化学灌浆施工技术
短句来源
     Dam Crack Research Based on Variable Precision Rough Sets Model
     基于变精度粗集模型的大坝裂缝研究
短句来源
     Based on the experiments with concrete samples,the multiplexing capability of the fiber optic sensing techniques adopted in large dam crack monitoring research in China at present were analysed quantitatively. The relationships between the multiplexing capabiliy of the optical fiber and crack width at the angles of 30°? 45°?
     基于混凝土模型试验,对大坝裂缝光纤监测中采用的光纤传感技术的分布式监测能力进行了定量分析,得到了传感光纤在大坝安全监控控制缝宽范围内、裂缝与光纤夹角为30°、45°、60°的复用能力及其与裂缝宽度关系曲线,为光纤传感在我国大型水电工程裂缝监测中的进一步研究和应用提供了理论依据。
短句来源
     Effect of Crack Orientation's Randomness on Multiplexing Capability of Distributed Fiber Optic Concrete Dam Crack Detection
     裂缝方位对大坝裂缝光纤监测复用能力的影响
短句来源
  坝裂缝
     Multiplexing Capability of Concrete Dam Crack Distributed Fiber Optic Monitoring
     混凝土坝裂缝光纤分布式监测能力
短句来源
     Study on Mmultiplexing Capability of Huge Concrete Dam Crack Distributed Fiber Optic Monitoring
     混凝土高坝裂缝光纤分布式监测能力的研究
短句来源
  坝体裂缝
     And it is suitable to analyze dam crack propagating with fracture mechanics methods.
     对坝体裂缝扩展的分析计算 ,用断裂力学的理论和方法较为适宜。
短句来源
  “dam crack”译为未确定词的双语例句
     The application of element-free method to approximate calculation of arch dam crack propagation
     应用无单元法近似计算拱坝开裂
短句来源
     Firstly, the difference of standard and variable precision rough sets was introducd, the VPRS model of dam crack was established, and then the main factors were extracted through discretization and ruduction, finally a practical application of the model was illustrated.
     首先介绍了标准粗集理论和变精度粗集理论的基本原理以及两者的主要差别,然后建立了大坝裂缝的变精度粗集模型,并通过属性离散化和属性约简得到大坝裂缝的主要影响因素,最后给出了这一模型在工程中的实际应用。
短句来源
     APPLICATION OF NONSTATIONARY TIME SERIES TO THE SPECIAL DAM CRACK DATA ANALYSIS
     非平稳时间序列法在特殊裂缝观测资料分析中的应用
短句来源
     Application of Variable Precision Rough Sets to Analysing Affecting Factors of Dam Crack
     基于VPRS理论的裂缝影响因素分析
短句来源
     The stress field of RCC gravity dam is the main factor to lead to the dam crack, the stresses caused by the other factors are less than temperature stress field, which function is for controlling.
     碾压混凝土坝温度应力是导致坝体裂缝的主要因素,其他荷载所引起的应力与温度应力相比相对较小,温度应力起控制作用。
短句来源
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According to the structure of arch dams and property of stress distribution, it is considered that the juctures of dam sections, the juction parts of a dam and its foundation, as well as the joint face between concrets are frail in strength. As arch dams' fractures result in redistribution of stress, to improve calculation we have used six nodes isoparametric elements in Finite Element Method.Arch dam crack field is determined with stress of element Gauss points, pressed dam elements have been used...

According to the structure of arch dams and property of stress distribution, it is considered that the juctures of dam sections, the juction parts of a dam and its foundation, as well as the joint face between concrets are frail in strength. As arch dams' fractures result in redistribution of stress, to improve calculation we have used six nodes isoparametric elements in Finite Element Method.Arch dam crack field is determined with stress of element Gauss points, pressed dam elements have been used to analog the joint part of a dam and its foundation.Based on the non-linear analysis of arch dams, a method of estimating ultimate load capacity for arch dams has been developed. Since the stress transfers slowly when cracks hvae occured and elements cracks befall frequently while dams are damaged, the initial stress method and variable stiffness method became improper for calculation. In this paper an alternative iteration method with more accuracy is proposed

本文根据拱坝结构和应力分布的特点,假设坝段缝、边缘接触面和新老混凝土交接面是拱坝的几个强度薄弱面.由于这些面的开裂引起坝体应力的重分布.在有限元计算时采用六节点等参数单元,以单元高斯点的应力值确定坝体开裂范围,同时采用压扁的坝体单元来模拟坝体与地基的接缝.在拱坝非线性分析基础上探讨了拱坝极限承载能力的估算方法,由于接缝单元开裂后应力转移缓慢且拱坝破坏时坝体单元开裂很多,单纯用初应力法或变劲度迭代法已不能满足计算的需要,本文提出用交替迭代法可以得到较好的效果.

The items of seepage observation for the concrete dam in Danjiangkou key water control project comprises foundation uplift pressure, foundation seepage flow and dam crack leakage, In this paper, the dcsign of uplift pressure and seepage prevention is briefly described. Based on an analysis of the data collected in a long-term observation for more than ten years, the variation patterns of uplift pressure and seepage flow are investigated. From the investigation, some suggestions are made. Causes of the...

The items of seepage observation for the concrete dam in Danjiangkou key water control project comprises foundation uplift pressure, foundation seepage flow and dam crack leakage, In this paper, the dcsign of uplift pressure and seepage prevention is briefly described. Based on an analysis of the data collected in a long-term observation for more than ten years, the variation patterns of uplift pressure and seepage flow are investigated. From the investigation, some suggestions are made. Causes of the decreasing of foundation seepage flow of block 19—31 are analyzed. An observation on dam-heel crack for studying the abnormal sudden change of uplift pressure and seepage flow of blocks close to the round corner of right bank is also introduced.

丹江口水利枢纽混凝土坝渗透观测有坝基扬压力、基础渗流量和坝体裂缝漏水观测。本文简述了该坝坝基防渗及扬压力设计,总结了十多年的观测资料,分析了实测扬压力和渗流量变化规律,对原设计和《混凝土重力坝设计规范》(以下简称规范),提出了一些改进建议;对19—31坝段基础渗流量趋势性减小现象进行了分析研究;对右岸转弯坝段扬压力和渗流量陡涨陡落的异常情况进行了坝踵开裂试验观测。

he paper presents a causing analysis of dam crack during Operational period in terms ofprototype observational data and by using 3 - dimensional finite element method. The main reasoncausing surface crack near transverse jointS iS a sudden emptying Of reserroir in combination withlarge drop in temperature. Results are valuable for reference in dam engineering

本文采用原型观测资料及三维有限元分析,对金坑拱坝运行期裂缝成因进行了较深入分析,认为空库加温降是导致坝体横缝表面开裂的主要原因.所得结果对类似工程有较大的参考价值.

 
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