軌道交通能夠大幅緩解交通壓力、帶動國民經濟快速發(fā)展。雜散電流是以走行軌為回流線的電氣化軌道交通難以避免的現實問題。雜散電流能夠對下部鋼筋混凝土構件和結構等產生腐蝕。與自然自然腐蝕不同,雜散電流腐蝕中的絕大部分屬腐蝕電化學非線性系統(tǒng)范疇,腐蝕速率可達自然腐蝕的數倍甚至百倍,,因此雜散電流腐蝕是列車的運營安全的潛在威脅之一。本文針對雜散電流作用對混凝土抗壓、抗折和疲勞三種基本力學性能的影響展開研究。(接下來主要談控制哪些試驗條件、做了多少混凝土試樣、進行了哪些試驗研究等試驗設計方面的內容)主要研究目的是研究壓縮混凝土時恒定電流強度的影響,混凝土彎曲強度和混凝土壓縮疲勞強度時的變化。為了進行研究,在實驗室條件下創(chuàng)建了與實際情況類似的條件,其中具體在外部直流電的影響下進行測試。在這些條件下,混凝土長時間暴露于電場和機械載荷。為了確定混凝土電場的強度,我們使用了兩個主要因素-電流作用在混凝土上的電流和電場暴露于混凝土的時間�；炷翉澢蛪嚎s試驗每個月通過三個月。疲勞試驗在研究開始三個月后進行。(本段要給出通過試驗研究,在抗壓、抗折和疲勞三方面內容上,得到的主要結論)隨著供應給混凝土的電力電壓的增...

【文章頁數】：89 頁

【學位級別】：碩士

【文章目錄】：
摘要
Abstract
Chapter 1 Introduction
    1.1 Research Background
    1.2 Objectives and Significance of the Research
        1.2.1 Objectives of the Research
        1.2.2 Stray Current Corrosion Risk
        1.2.3 Significance of the Research
    1.3 Literature Review
    1.4 Main Research Content and Basic Study Method
        1.4.1 Main Research Content
        1.4.2 Basic Study Method
Chapter 2 Corrosion Mechanism of the Reinforcement Caused by the Stray Current
    2.1 Introduction of Chapter
    2.2 Electrochemical Corrosion Mechanism of Reinforced Concrete Structures
    2.3 Corrosion Mechanism of Stray Current in Reinforced Concrete Structures
    2.4 Summary of the Chapter
Chapter 3 Raw Materials and Experimental Methods
    3.1 Introduction of Chapter
    3.2 The Materials Used
        3.2.1 Determination of Crushing Index of Crushed Stone
        3.2.2 Determination of Apparent Density of Gravel and Sand
        3.2.3 Determination of Concrete Slump
        3.2.4 Preparation of Electrode in Concrete Specimen
        3.2.5 Plexiglass Mold
    3.3 Production of Concrete Samples
    3.4 Control of Experimental Conditions for Concrete Specimen
    3.5 Creation of an Electric Field
    3.6 Summary of the Chapter
Chapter 4 Determination of Mechanical Properties of Concrete
    4.1 Introduction of Chapter
    4.2 Change Mass of Metal Plates
    4.3 Investigations of the Effect of Electric Current on Compressive Strength of Concrete
        4.3.1 Compression Test Conditions and Test Procedure
        4.3.2 Results and Description Results of Compression Test
    4.4 Investigations of the Effect of Electric Current on Bending Strength of Concrete
        4.4.1 Bending Test Conditions and Test Procedure
        4.4.2 Results and Discussion of Bending Test
    4.5 Fatigue Test
        4.5.1 Fatigue Test Conditions and Test Procedure
        4.5.2 Results and Discussion of Fatigue Test
    4.6 Summary of the Chapter
Conclusion
References
Acknowledgements
Resume



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