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首页> 美国卫生研究院文献>Materials >Evaluation of Static and Dynamic Residual Mechanical Properties of Heat-Damaged Concrete for Nuclear Reactor Auxiliary Buildings in Korea Using Elastic Wave Velocity Measurements
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Evaluation of Static and Dynamic Residual Mechanical Properties of Heat-Damaged Concrete for Nuclear Reactor Auxiliary Buildings in Korea Using Elastic Wave Velocity Measurements

机译：利用弹性波速度测量法评估韩国核反应堆辅助建筑用热损伤混凝土的静态和动态残余力学性能

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The main objectives of this study are (1) to investigate the effects of heating and cooling on the static and dynamic residual properties of 35 MPa (5000 psi) concrete used in the design and construction of nuclear reactor auxiliary buildings in Korea; and (2) to establish the correlation between static and dynamic properties of heat-damaged concrete. For these purposes, concrete specimens (100 mm × 200 mm cylinder) were fabricated in a batch plant at a nuclear power plant (NPP) construction site in Korea. To induce thermal damages, the concrete specimens were heated to target temperatures from 100 °C to 1000 °C with intervals of 100 °C, at a heating rate of 5 °C/min and allowed to reach room temperature by natural cooling. The dynamic properties (dynamic elastic modulus and dynamic Poisson’s ratio) of concrete were evaluated using elastic wave measurements (P-wave velocity measurements according to ASTM C597/C597M-16 and fundamental longitudinal and transverse resonance tests according to ASTM C215-14) before and after the thermal damages. The static properties (compressive strength, static elastic modulus and static Poisson’s ratio) of heat-damaged concrete were measured by the uniaxial compressive testing in accordance with ASTM C39-14 and ASTM C469-14. It was demonstrated that the elastic wave velocities of heat-damaged concrete were proportional to the square root of the reduced dynamic elastic moduli. Furthermore, the relationship between static and dynamic elastic moduli of heat-damaged concrete was established in this study. The results of this study could improve the understanding of the static and dynamic residual mechanical properties of Korea NPP concrete under heating and cooling.
机译：这项研究的主要目的是：（1）研究加热和冷却对韩国设计和建造核反应堆辅助建筑物时使用的35 MPa（5000 psi）混凝土静静态残余特性的影响； （2）建立热损伤混凝土静动态特性之间的相关性。为此，在韩国核电站（NPP）施工现场的批处理工厂中制作了混凝土标本（100 mm×200 mm圆柱体）。为了引起热损伤，以5°C / min的加热速率将混凝土试样以100°C的间隔加热至100°C至1000°C的目标温度，并通过自然冷却使其达到室温。之前和之后，使用弹性波测量（根据ASTM C597 / C597M-16进行P波速度测量以及根据ASTM C215-14进行基本纵向和横向共振测试）评估混凝土的动态特性（动态弹性模量和动态泊松比）。热损坏后。根据ASTM C39-14和ASTM C469-14，通过单轴压缩试验测量热损伤混凝土的静态性能（抗压强度，静态弹性模量和静态泊松比）。结果表明，热损伤混凝土的弹性波速度与减小的动态弹性模量的平方根成比例。此外，本研究建立了热损伤混凝土的静态和动态弹性模量之间的关系。这项研究的结果可以增进对韩国NPP混凝土在加热和冷却下的静态和动态残余力学性能的了解。

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