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大坝混凝土断裂性能试验与研究(英文版)(精)

  • 定价: ¥79
  • ISBN:9787112215546
  • 开 本:16开 精装
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  • 折扣:
  • 出版社:中国建筑工业
  • 页数:192页
  • 作者:赵志方//周厚贵//...
  • 立即节省:
  • 2017-12-01 第1版
  • 2017-12-01 第1次印刷
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导语

  

内容提要

  

    大坝是国家的中啊哟基础设施之一。在中国乃至世界的大坝建设中,混凝土坝是使用最多、最广的一种坝型,其优点众多,但混凝土开裂严重影响了坝体的抗震性和耐久性,赵志方、周厚贵、赵志刚著的《大坝混凝土断裂性能试验与研究(英文版)(精)》在三峡大坝的建造基础上,对“大体积混凝土裂缝方针段里分析研究”等课题实验和研究成果进行全面的总结,并提出了大坝混凝土防裂、控裂乃至建造无裂缝大坝的工程理论和工程实践的案例体系,对今后大坝工程建设技术进步具有重要的促进作用。

目录

序I
Preface I
Preface II
Summary
1 Introduction
  1.1 Overview
  1.2 Fracture Experiments of Tnree Gorges Dam Concrete
    1.2.1 Specimens
    1.2.2 Materials and mix proportions
    1.2.3 Test program
    1.2.4 Three-point bending notched beam (TPB) tests
    1.2.5 Wedge splitting (WS) test
    1.2.6 Direct tension (DT) tests and fundamental mechanical performance tests
2 State-of-the-art Review on Concrete Softening Curve
  2.1 Introduction
  2.2 Determination Approach of the Tensile Softening Relationships (a-w curves)
    of Concrete
    2.2.1 Direct tension test method
    2.2.2 J-Integral method
    2.2.3 Inverse analysis method
  2.3 Shape of Softening Curve of Concrete
    2.3.1 Linear shape softening curve of concrete
    2.3.2 Linear softening curve of concrete
  2.4 Conclusions
    References
3 Two Methods for Determining Softening Relationships of Dam Concrete andWet-screening
    Concrete
  3.1 Introduction
  3.2 Experiments
    3.2.1 Material, mix and specimens preparation
    3.2.2 Fracture tests
  3.3 Softening Relationships of Dam Concrete and Wet-screened Concrete
    Determined by the Direct Tension Tests
    3.3.1 Stress-deformation (a-d) curves
    3.3.2 Direct tension method for identifying a-w curve
    3.3.3 Results of direct tension method
  3.4 Softening Relationships Determined by the Inverse Analysis Method
    3.4.1 Cracking strength
    3.4.2 Inverse analysis method based on the cracking strength criterion
    3.4.3 Results of inverse analysis method
  3.5 Comparison of Softening Relationships of Dam Concrete and Wet-screening
    Concrete
    3.5.1 Comparison of Softening Relationship of Dam Concrete and Wet-
    Screening Concrete Determined by Direct Tension Method and Inverse
    Analysis Method
    3.5.2 Comparison of Fracture Energy of Dam Concrete and Wet-Screening
    Concrete Determined by WOF Method and TSD Method
  3.6 Conclusions
    References
4 Prediction of the Tension Softening Curve of Dam Concrete Based on BP Neural
    Network
  4.1 Introduction
  4.2 Introduction of the Direct Tension Test
  4.3 Prediction of the Tension Softening Curve of Dam Concrete
    4.3.1 Determination of the network structure
    4.3.2 Selection of network transfer function
    4.3.3 Training and simulation of the network
  4.4 Conclusions
    References
5 Effect of Specimen Size on Fracture Energy and Softening Curve of Concrete: Part I.
    Experiments and Fracture Energy
  5.1 Introduction
  5.2 Experiments
    5.2.1 Materials
    5.2.2 Test program
6 Effect of Specimen Size on Fracture Energy and Softening Curve of Concrete: Part II. Inverse Analysis and Softening Curve
7 Influence of Coarse Aggregate Size on Softening Curve of Concrete
8 Research on Softening Curve of Concrete and Fracture Energy by Different Methods
9 Research on Softening Properties of Concrete Based on Three-point Bend Beam Tests
10 Softening Behaviors of Dam Concrete and Wet-screening Concrete
11 Effect of Processing of Tail section of tested Curve on Fracture Energy of Dam Concrete
12 Experimental Study for Determining Double-K Fracture Parameters of the Three Gorges Dam Concrete
13 Experimental Research on Double-K Fracture Parameters of Dam Concrete with Various Aggregate Gradation
14 Analysis and Research on Crack Prevention in Hole Roof for the Three Gorges Project
15 Construction Technology and Practice of Dam without Cracks