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作者:

Geng, Yan (Geng, Yan.) | Li, Xiongyan (Li, Xiongyan.) (学者:李雄彦) | Xue, Suduo (Xue, Suduo.) (学者:薛素铎) | Li, Jinguang (Li, Jinguang.) | Song, Yanjie (Song, Yanjie.)

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EI Scopus SCIE

摘要:

Hydration heat and thermal induced cracking have always been a fatal problem for massive concrete structures. In order to study a massive reinforced concrete wall of a storage tank for liquefied natural gas (LNG) during its construction, two mock-ups of 0.8 mx0.8 mx0.8 m without and with metal corrugated pipes were designed based on the actual wall construction plan. Temperature distribution and strain development of both mock-ups were measured and compared inside and on the surface of them. Meanwhile, time-dependent thermal and mechanical properties of the concrete were tested standardly and introduced into the finite-element (FL) software with a proposed hydration degree model. According to the comparison results, the FL simulation of temperature field agreed well with the measured data. Besides, the maximum temperature rise was slightly higher and the shrinkage was generally larger in the mock-up without pipes, indicating that corrugated pipes could reduce concrete temperature and decrease shrinkage of surrounding concrete. In addition, the cooling rate decreased approximately linearly with the reduction of heat transfer coefficient h, implying that a target cooling curve can be achieved by calculating a desired coefficient h. Moreover, the maximum cooling rate did not necessarily decrease with the extension of demoulding time. It is better to remove the formwork at least after 116 hours after concrete casting, which promises lower risk of thermal cracking of early-age concrete.

关键词:

strain monitoring LNG storage tank finite-element simulation hydration degree time-dependent thermal property reinforced concrete thermal analysis

作者机构:

  • [ 1 ] [Geng, Yan]Beijing Univ Technol, Coll Architecture & Civil Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 2 ] [Li, Xiongyan]Beijing Univ Technol, Coll Architecture & Civil Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 3 ] [Xue, Suduo]Beijing Univ Technol, Coll Architecture & Civil Engn, 100 Pingleyuan, Beijing 100124, Peoples R China
  • [ 4 ] [Li, Jinguang]China Huanqiu Contracting & Engn Co Ltd, Dept Civil Engn, 1 Chuangda 2nd Rd, Beijing 100012, Peoples R China
  • [ 5 ] [Song, Yanjie]China Huanqiu Contracting & Engn Co Ltd, Dept Civil Engn, 1 Chuangda 2nd Rd, Beijing 100012, Peoples R China

通讯作者信息:

  • 李雄彦

    [Li, Xiongyan]Beijing Univ Technol, Coll Architecture & Civil Engn, 100 Pingleyuan, Beijing 100124, Peoples R China

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来源 :

COMPUTERS AND CONCRETE

ISSN: 1598-8198

年份: 2018

期: 3

卷: 21

页码: 279-289

4 . 1 0 0

JCR@2022

ESI学科: COMPUTER SCIENCE;

ESI高被引阀值:161

JCR分区:3

被引次数:

WoS核心集被引频次: 5

SCOPUS被引频次: 5

ESI高被引论文在榜: 0 展开所有

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中文被引频次:

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