Research on the Fatigue Properties of High Strength Concrete after Exposure to High Temperature under Low Cyclic Compressive Loading

Gao Haibiao; Gao Haijing; Luo Zhili; Wang Linhao

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Research on the Fatigue Properties of High Strength Concrete after Exposure to High Temperature under Low Cyclic Compressive Loading

机译：低循环压缩载荷下高温后高强度混凝土的疲劳性能研究

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By using an electrohydraulic servo fatigue testing machine, fatigue tests were performed on C60 high strength concrete (HSC) under low cyclic compressive loading after undergoing normal temperature, 200 degrees C, 400 degrees C, 600 degrees C, and 800 degrees C. Failure patterns of high strength concrete tinder low cyclic compressive loading were observed. The influence of the high temperature process on the static elastic modulus of high strength concrete was analyzed. By studying the development law of fatigue strain, regression equations of fatigue strain after different high temperatures were established. Furthermore, the fatigue deformation modulus ratio was defined as the damage variable and the relationship models between the high temperature process and the fatigue damage were established. It provides the experimental foundation for fatigue damage analysis of high strength concrete in objective working conditions, which includes repeated loading and different high temperature processes.

机译：使用电液伺服疲劳试验机，对C60高强度混凝土（HSC）进行了常温，200°C，400°C，600°C和800°C的低循环压缩载荷后进行了疲劳测试。观察到高强度混凝土火炬的低循环压缩载荷。分析了高温工艺对高强度混凝土静弹性模量的影响。通过研究疲劳应变的发展规律，建立了不同高温条件下疲劳应变的回归方程。此外，将疲劳变形模量比定义为损伤变量，建立了高温过程与疲劳损伤之间的关系模型。它为客观工作条件下的高强度混凝土的疲劳损伤分析提供了实验基础，其中包括反复加载和不同的高温过程。

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来源
《Shock and vibration》 |2018年第5期|3762685.1-3762685.11|共11页
作者
Gao Haibiao; Gao Haijing; Luo Zhili; Wang Linhao;
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作者单位

Beijing Municipal, Wangzuo Township Peoples Govt Fengtai Dist, Beijing 10007, Peoples R China;

Taiyuan Univ Technol, Coll Architecture & Civil Engn, Taiyuan, Shanxi, Peoples R China;

Jiangling Motors Co Ltd, Taiyuan, Shanxi, Peoples R China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
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1. Research on the Fatigue Properties of High Strength Concrete after Exposure to High Temperature under Low Cyclic Compressive Loading [J] . Linhao Wang, Haijing Gao, Haibiao Gao, Shock and vibration . 2018,第1期

机译：低循环压缩载荷下高温后高强度混凝土的疲劳性能研究
2. Fatigue Properties of Plain Concrete Under Triaxial Compressive Cyclic Loading [J] . 曹伟, 宋玉普, 刘海成中国海洋工程（英文版） . 2004,第003期

机译：三轴压缩循环载荷下普通混凝土疲劳特性
3. Fatigue Strength Improvement of Non-Load Carrying Type Cruciform Welded Joint by the Low Temperature Transformation Welding Wire and Effect of Compressive Over-Loading [J] . M. Mohri, K. Sakano, K. Arakawa, Welding Research Abroad . 2004,第1期

机译：低温转变焊丝提高无载式十字形焊接接头疲劳强度及压缩过载的影响
4. Research on Fatigue Strength of Concrete under Multi-axial Compressive Cyclic Loading [C] . Yupu Song, Wei Cao International offshore and polar engineering conference;ISOPE 2004 . 2004

机译：多轴压缩循环荷载下混凝土疲劳强度的研究
5. BEHAVIOR OF PRESTRESSED CONCRETE SUBJECTED TO LOW TEMPERATURES AND CYCLIC LOADING (CRYOGENIC, OFFSHORE). [D] . BERNER, DALE ERIC. 1984

机译：预应力混凝土在低温和循环荷载作用下的性能（低温，海上）。
6. Residual Compressive Strength of Recycled Aggregate Concretes after High Temperature Exposure [O] . Francisco B. Varona, Francisco Baeza-Brotons, Antonio J. Tenza-Abril, 2020

机译：高温暴露后再生骨料混凝土的残余抗压强度
7. Mechanical properties of various concrete after high temperature exposure Mechanical property of various types of concrete after high temperature exposure is investigated. Considering compressive strength requirement for a vertical element in high rise building, concrete specimens with various design strengths of 35, 80, 100, and 150 MPa were tested. Particularly, the influence of incorporated steel fiber on fire resistance is of interest in this study. Experimental results show that the fire resistance depends on the design strength and steel fiber content. Normal strength concrete (NSC) of a design strength of 35 MPa or high performance concrete (HPC) of 80-100 MPa does not spall when exposed to 100-400 °C of temperature. However, an explosive spalling occurs at 300 °C when the HPCs contain 1 vol. of steel fiber. Ultra-high performance concrete (UHPC) of a design strength of 150 MPa and 1.5 vol. of steel fiber also shows dramatic spalling at 300 °C. The experimental results found in this study can contribute to a better understanding of the behaviors of HPC and UHPC under fire and the role of steel fiber on the fire resistance. [O] . 2017

机译：研究了高温暴露后各种混凝土高温曝光机械性能各种混凝土的机械性能。考虑到高层建筑中垂直元件的抗压强度要求，测试了35,80,100和150MPa各种设计强度的混凝土试样。特别是，在这项研究中，掺入钢纤维对耐火性的影响。实验结果表明，耐火性取决于设计强度和钢纤维含量。在暴露于100-400°C的温度时，80-100MPa的设计强度为35MPa或高性能混凝土（HPC）的正常强度混凝土（NSC）不会击落。然而，当HPC含有1体积的钢纤维的百分比时，爆炸性剥落发生在300℃。超高性能混凝土（UHPC）的设计强度为150 MPa和1.5 Vol。钢纤维的百分比也显示出300℃的剧烈剥落。本研究中发现的实验结果可以有助于更好地了解在火灾中的HPC和UHPC的行为以及钢纤维对耐火性的作用。

Research on the Fatigue Properties of High Strength Concrete after Exposure to High Temperature under Low Cyclic Compressive Loading

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