大坝混凝土断裂性能试验与研究(英文版)(精) 电子版 免费 pdf 下载 azw3 fb2 caj mobi

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序I

Preface I

Preface II

Summary

1 Introduction

1.1 Overview

1.2 Fracture Experiments of Tnree G***es Dam Concrete

1.2.1 Specimens

1.2.2 Materials and mix proporti***

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 Relati***hips (a-w curves)

of Concrete

2.2.1 Direct tension test method

2.2.2 J-Integral method

2.2.3 Inverse ***ysis 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 Conclusi***

References

3 Two Methods for Determining Softening Relati***hips 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 Relati***hips 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 Relati***hips Determined by the Inverse Analysis Method

3.4.1 Cracking strength

3.4.2 Inverse ***ysis method based on the cracking strength criterion

3.4.3 Results of inverse ***ysis method

3.5 Comparison of Softening Relati***hips of Dam Concrete and Wet-screening

Concrete

3.5.1 Comparison of Softening Relati***hip 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 Conclusi***

References

4 Prediction of the Tension Softening Curve of Dam Concrete Based on BP Neural

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