ASSESSMENT OF TEMPERATURE EFFECT ON THE STRESS-STRAIN BEHAVIOR OF A CONCRETE GRAVITY DAM

N. A. Aniskin; A. M. Shaytanov

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ASSESSMENT OF TEMPERATURE EFFECT ON THE STRESS-STRAIN BEHAVIOR OF A CONCRETE GRAVITY DAM

机译：对混凝土重力坝应力 - 应变行为的评估

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The paper discusses the effect of temperature on the stress-strain behavior on a concrete gravity dam built on a rocky foundation during the operational period. A numerical simulation was used to obtain the temperature conditions of the structure during the operational period. The thermal stresses of the structure were calculated. Based on the study results, the assessment of the extent of thermal factors impact during the operational period was performed, and the conclusions were made concerning the operability and safety of the structure under the basic load combination. The most dangerous operation period for the "dam-foundation" system was determined.

机译：本文讨论了温度对在运营期间岩石基础上建造的混凝土压力坝上应力 - 应变行为的影响。使用数值模拟来在运行期间获得结构的温度条件。计算结构的热应力。根据研究结果，进行了在运营期间产生的热因素程度的评估，并结论了基本载荷组合下结构的可操作性和安全性。确定“坝上基础”系统的最危险的运行期。

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来源
《Hydrotechnical Construction》 |2020年第2期|154-159|共6页
作者
N. A. Aniskin; A. M. Shaytanov;
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作者单位

National Research Moscow State University of Civil Engineering Moscow Russia;

National Research Moscow State University of Civil Engineering Moscow Russia;

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原文格式 PDF
正文语种 eng
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关键词
concrete gravity dam; operational period; numerical studies; temperature effects; stress-strain behavior;

机译：混凝土重力坝;运营期;数值研究;温度效应;应力 - 应变行为;

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专利

1. Stress-strain behavior of reinforcing steel and concrete under seismic strain rates and low temperatures [J] . A Filiztrault, M. Holleran Materials and structures . 2001,第238期

机译：地震应变率和低温下钢筋混凝土的应力应变特性
2. Dam-Reservoir-Foundation Interaction Effects on Nonlinear Seismic Behavior of Concrete Gravity Dams Using Damage Mechanics Approach [J] . H. Mirzabozorg, M. Ghaemian, A. Noorzad, European Earthquake Engineering . 2007,第3期

机译：损伤力学方法研究大坝-水库-基础相互作用对混凝土重力坝非线性地震行为的影响
3. Damage demand assessment of mainshock-damaged concrete gravity dams subjected to aftershocks [J] . Wang Gaohui, Wang Yongxiang, Lu Wenbo, Soil Dynamics and Earthquake Engineering . 2017,第Jula期

机译：余震对主震混凝土重力坝的破坏需求评估
4. Thermal stress and temperature control of concrete gravity dams without longitudinal joint including RCC gravity dams [C] . B.Zhu, P.Xu International conference on innovation in concrete structures: design and construction . 1999

机译：无纵缝的混凝土重力坝（包括RCC重力坝）的热应力和温度控制
5. Seasonal temperature and stress distributions in concrete gravity dams [D] . Venturelli, John 1992

机译：混凝土重力坝的季节温度和应力分布
6. Experimental Study of Rubberized Concrete Stress-Strain Behavior for Improving Constitutive Models [O] . Kristina Strukar, Tanja Kalman Šipoš, Tihomir Dokšanović, 2018

机译：橡胶混凝土应力-应变特性改进本构模型的试验研究
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。

ASSESSMENT OF TEMPERATURE EFFECT ON THE STRESS-STRAIN BEHAVIOR OF A CONCRETE GRAVITY DAM

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