ISSN 1671-1092 CN 33-1260/TK

大坝与安全 ›› 2019 ›› Issue (2): 32-.

• 运行管理 • 上一篇    下一篇

冻融对水工混凝土力学性能的影响及受冻混凝土强度衰减模型研究

刘艳霞,陈改新,纪国晋,刘晨霞   

  1. 中国水利水电科学研究院,北京,100038
  • 收稿日期:2019-02-26 出版日期:2019-04-08 发布日期:2019-04-08
  • 作者简介:刘艳霞(1977- ),女,山东青州人,博士,高级工程师,主要从事水工混凝土性能和水工新材料研究。

Influence of freeze-thaw on mechanical properties of hydraulic concrete and study of its strength attenuation model

LIU Yan- xia, CHEN Gai- xin, JI Guo- jin and LIU Chen- xia   

  1. China Institute of Water Resources and Hydropower Research
  • Received:2019-02-26 Online:2019-04-08 Published:2019-04-08

摘要: 在检测和评价发生劣化的混凝土结构时,常采用无损检测方法,但无法根据检测结果预测今后混凝土的老化进程和使用寿命等。笔者研究了冻融作用下混凝土力学性能的衰减规律,并采用损伤力学方法建立动弹性模量表征的损伤量与混凝土力学性能相对值之间的关系,以便为水工建筑物混凝土的检测和评估提供依据和参考。

关键词: 混凝土, 冻融, 强度, 衰减模型

Abstract: There are many non-destructive methods for deterioration detection and health evaluation of old hydraulic structures. However, how to quantitatively determine the influence of frost damage on concrete properties, aging and state of old structures is a problem. In this paper, the deterioration rules of mechanical properties of concrete in freeze-thaw process are studied, and the relationship between damage amount and concrete properties is established, aiming to provide a theoretical basis for diagnoses and identification of concrete aging state of hydraulic structure.

Key words: concrete, freeze-thaw, strength, attenuation model