Experimental Investigation on Mechanical Properties of Q235B Hot-Rolled Structure Steel at Elevated Temperatures

机译：Q235B热轧结构钢在高温下力学性能的实验研究

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The deterioration of the mechanical properties of yield strength and modulus of elasticity is considered as the primary properties affecting the performance of steel structures under fire. Accurate mechanical properties data at elevated temperature is requisite in the safety design and analysis of hot-rolled steel structures under fire. However, the variation of these properties for steel structures at different temperatures is not systematically reported in China for the moment. Grade Q235B hot-rolled structure steels are widely used in China. Therefore, the steady state tensile tests were conducted for structure steels taken from the beam of Grade Q235B hot-rolled structure steel at different temperatures ranged from 20 to 1000°C to derive accurate reduction factors for mechanical properties in fire safety calculation. The experimental results were presented in the paper, and the simplified models for the stress-strain curves of the steel studied at elevated temperatures were proposed also. Some test results are compared with material model for steel according to the EC3, AS4100 and BS5950-8, which are standards of Europe, Australian, and British respectively, since the effective yield strength of different strain levels ate adopted in these standards.

机译：屈服强度和弹性模量的机械性能下降被认为是影响着火钢结构性能的主要性能。高温下准确的机械性能数据是火灾下热轧钢结构的安全设计和分析所必需的。但是，目前国内尚未系统报道不同温度下钢结构的这些性能变化。 Q235B级热轧结构钢在中国被广泛使用。因此，对从Q235B级热轧结构钢梁获得的结构钢进行了稳态拉伸试验，其温度范围为20至1000°C，以得出用于防火安全性计算的准确的力学性能折减系数。给出了实验结果，并提出了在高温下研究钢的应力-应变曲线的简化模型。根据欧洲，澳大利亚和英国的标准EC3，AS4100和BS5950-8，将一些测试结果与钢的材料模型进行了比较，因为在这些标准中采用了不同应变水平的有效屈服强度。

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《The 2008 International Symposium on Safety Science and Technology(2008年安全科学技术国际会议)论文集》|2008年|790-795|共6页
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HU Jun; YAO Bin; LI Peide;
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mechanical properties; hot-rolled structure steels; stress-swain model; elevated temperatures;

机译：力学性能;热轧结构钢;应力波模型;高温;

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2. Mechanical properties of partially damaged structural steel induced by high strain rate loading at elevated temperatures - An experimental investigation [J] . Mahsa Mirrnomeni, Amin Heidarpour, Xiao-Ling Zhao, International journal of impact engineering . 2015,第feba期

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3. Experimental investigation of the mechanical properties of ZAR-345 cold-formed steel at elevated temperatures [J] . Alexandre Landesmann, Eduardo De Miranda Batista, Fernanda Cristina Moreira Da Silva Materials Research . 2014,第4期

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4. Effect of Coiling Temperatures on the Microstructure and Mechanical Properties of Hot-Rolled Strip of Alloy Tool Steel SKS51 Produced by TSCR Process [C] . BAO Siqian, XU Shuai, ZHAO Gang, International Symposium on Thin Slab Casting and Direct Rolling;Chinese Society of Metals;China BAOWU Steel Group;Chinese Academy of Engineering . 2018

机译：卷取温度对TSCR工艺生产的合金工具钢SKS51热轧带钢组织和力学性能的影响
5. Mechanical Properties of Cold-drawn Steel Strand at Elevated Temperatures. [D] . Thompson, Conor. 2015

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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。
8. High-Temperature Properties of Four Low-Alloy Steels for Jet-Engine Turbine Wheels Part 2. A Survey of the Relations Between Microstructure and Elevated-Temperature Properties of Four Low-Alloyed Steels at 700° to 1200°F [R] . ADRON I. RUSH, JAMES W. FREEMAN 1955

机译：喷气发动机汽轮机用四种低合金钢的高温性能第2部分：4种低合金钢在700°~1200°F的微观结构与高温性能关系的研究

Experimental Investigation on Mechanical Properties of Q235B Hot-Rolled Structure Steel at Elevated Temperatures

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