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Experimental and Numerical Study on Tensile Strength of Concrete under Different Strain Rates

机译：不同应变率下混凝土抗拉强度的试验与数值研究

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The dynamic characterization of concrete is fundamental to understand the material behavior in case of heavy earthquakes and dynamic events. The implementation of material constitutive law is of capital importance for the numerical simulation of the dynamic processes as those caused by earthquakes. Splitting tensile concrete specimens were tested at strain rates of 10⁻⁷ s⁻¹ to 10⁻⁴ s⁻¹ in an MTS material test machine. Results of tensile strength versus strain rate are presented and compared with compressive strength and existing models at similar strain rates. Dynamic increase factor versus strain rate curves for tensile strength were also evaluated and discussed. The same tensile data are compared with strength data using a thermodynamic model. Results of the tests show a significant strain rate sensitive behavior, exhibiting dynamic tensile strength increasing with strain rate. In the quasistatic strain rate regime, the existing models often underestimate the experimental results. The thermodynamic theory for the splitting tensile strength of concrete satisfactorily describes the experimental findings of strength as effect of strain rates.

机译：混凝土的动态特性是理解大地震和动态事件情况下材料行为的基础。物质本构定律的实施对于地震等动态过程的数值模拟至关重要。在10 ^{−7 s ^{-1 至10 ^{−4 s ^{-1 在MTS材料测试机中。给出了抗拉强度与应变率的结果，并与抗压强度和在类似应变率下的现有模型进行了比较。还评估并讨论了拉伸强度的动态增加因子与应变率的关系曲线。使用热力学模型将相同的拉伸数据与强度数据进行比较。测试结果显示出显着的应变速率敏感性行为，表现出动态拉伸强度随应变速率增加。在准静态应变率状态下，现有模型常常低估了实验结果。混凝土的抗拉强度的热力学理论令人满意地描述了强度对应变率的影响的实验结果。}}}}

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期刊名称 other
作者
Fanlu Min; Zhanhu Yao; Teng Jiang;
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年(卷),期 -1(2014),-1
年度 -1
页码 173531
总页数 11
原文格式 PDF
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1. Experimental and Numerical Study on Tensile Strength of Concrete under Different Strain Rates [J] . FanluMin, ZhanhuYao, TengJiang ScientificWorldJournal . 2014,第3期

机译：不同应变率下混凝土拉伸强度的实验与数值研究
2. Experimental and theoretical studies of strength and stress-strain properties of the concrete under conditions of complex stress-strain states with presence of tensile stresses from the effect of a single-shot dynamic load of the general form [J] . MATEC Web of Conferences . 2016,第28期

机译：从一般形式的单次动载荷的影响出发，在复杂的应力-应变状态下存在拉伸应力的情况下，混凝土的强度和应力-应变特性的实验和理论研究
3. Experimental and theoretical studies of strength and stress-strain properties of the concrete under conditions of complex stress-strain states with presence of tensile stresses from the effect of a single-shot dynamic load of the general form [J] . Konstantin Tsvetkov MATEC Web of Conferences . 2016,第2016期

机译：一般形式的单次动态荷载作用下拉伸应力存在张力 - 应力状态下混凝土强度和应力 - 应变性能的实验与理论研究
4. A Numerical and Experimental Study of High Strain-rate Compression and Tension Response of Concrete [C] . Ahsan Samiee, Jon Isaacs, Sia Nemat-Nasser Annual Conference and Experimental and Applied Mechanics . 2011

机译：混凝土高应变率压缩和张力响应的数值和实验研究
5. Tensile deformation of third generation advanced high strength sheet steels under high strain rates [D] . Poling, Whitney A. 2016

机译：高应变率下第三代高强度高强度钢板的拉伸变形
6. Reinforcement Strains in Reinforced Concrete Tensile Members Recorded by Strain Gauges and FBG Sensors: Experimental and Numerical Analysis [O] . Gintaris Kaklauskas, Aleksandr Sokolov, Regimantas Ramanauskas, 2019

机译：应变片和FBG传感器记录的钢筋混凝土受拉构件中的钢筋应变：实验和数值分析
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. Theoretical and Experimental Investigation of Buried Concrete Structures. Volume III. Feasibility Study of Tensile Strain-Rate Sensitivity of Concrete. [R] . smith, j. h. hoitsma, k. h. 1975

机译：埋地混凝土结构的理论与试验研究。第三卷。混凝土拉伸应变率敏感性的可行性研究。

Experimental and Numerical Study on Tensile Strength of Concrete under Different Strain Rates

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