[1]朱秋菊,韩菊红,乐金朝..闸墩施工期温度应力仿真分析[J].郑州大学学报(工学版),2005,26(01):47-49,53.[doi:10.3969/j.issn.1671-6833.2005.01.012]
　ZHU Qiuju,Han Juhong,Lejin Chao.Simulation analysis of temperature stress during gate pier construction[J].Journal of Zhengzhou University (Engineering Science),2005,26(01):47-49,53.[doi:10.3969/j.issn.1671-6833.2005.01.012]

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闸墩施工期温度应力仿真分析()

分享到：

《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

26

期数:

2005年01期

页码:

47-49,53

栏目:

出版日期:

1900-01-01

文章信息/Info

Title:

Simulation analysis of temperature stress during gate pier construction

作者:

朱秋菊; 韩菊红; 乐金朝.

郑州大学环境与水利学院,河南,郑州,450002, 郑州大学环境与水利学院,河南,郑州,450002, 郑州大学环境与水利学院,河南,郑州,450002

Author(s):

ZHU Qiuju; Han Juhong; Lejin Chao

关键词:

闸墩;  数值仿真;  ANSYS;  温度应力;  裂缝;  温控措施

Keywords:

Gate piers;  numerical simulation;  ANSYS;  temperature stress;  cracks;  Temperature control measures

DOI:

10.3969/j.issn.1671-6833.2005.01.012

文献标志码:

A

摘要:

考虑外界气温条件、水泥水化热、弹模、徐变等热力学和物理力学参数以及分层浇筑(利用生死单元实现分层浇筑)对闸墩温度应力的影响,利用ANSYS软件三维有限元法进行闸墩施工期的瞬态温度场和应力场仿真计算.结果表明:内外温差过大,内部温升温降太快是闸墩出现裂缝的主要原因,并提出了对拌合材料冷却,降低浇筑温度,采用优化的保温保湿养护方法,在混凝土内预埋冷却水管,选用低热水泥,使用减水剂等减小内外温差,减缓温升温降过程,以有效防止施工期表面裂缝的产生.

Abstract:

Considering the external temperature conditions, heat of cement hydration, elastic mold, creep and other thermodynamic and physical mechanical parameters, as well as the influence of layered pouring (using life and death units to achieve layered pouring) on the temperature stress of the gate pier, the 3D finite element method of ANSYS software was used to simulate the transient temperature field and stress field during the construction period of the gate pier. The results show that the temperature difference between the inside and outside is too large, and the internal temperature rise and temperature drop is too fast, which is the main reason for the cracks in the gate pier, and it is proposed to cool the mixing material, reduce the pouring temperature, adopt the optimized heat preservation and moisturizing maintenance method, embed the cooling water pipe in the concrete, select low-heat cement, use water reducing agent, etc. to reduce the temperature difference between inside and outside, and slow down the temperature rise and temperature drop process, so as to effectively prevent the occurrence of surface cracks during construction.

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