水管冷却对大体积混凝土温度应力的影响研究

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发布时间：2020-01-06 00:00:00

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水管冷却对大体积混凝土温度应力的影响研究

Influence Research of Water Pipe Cooling on Temperature Stress of Mass Concrete

２０19年第8期

冷却水管；大体积混凝土；水化热；温度；数值分析

Cooling water pipe; Massive concrete; Hydration heat; Temperature; Numerical analysis

２０19年第8期

10.19761/j.1000-4637.2019.08.015.04

国家自然科学基金项目（51278064）。

王修山1，侯宁2

1.浙江理工大学建筑工程学院，杭州 310018；2.中国市政工程西北设计研究院有限公司，西安 710075

王修山1，侯宁2

王修山,侯宁.水管冷却对大体积混凝土温度应力的影响研究[J].混凝土与水泥制品,2019(8):15-18.

WANG X S, HOU N.Influence Research of Water Pipe Cooling on Temperature Stress of Mass Concrete[J].China Concrete and Cement Products,2019(8):15-18.

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摘要：为了研究大体积混凝土水化过程中的温度和应变规律，探寻大体积混凝土开裂的位置和时间，提出了有效的防裂措施，并考虑冷却水作用，模拟了不同浇筑温度、绝热温升、冷却水流量下大体积混凝土的温度和温度应力在不同龄期下的发展过程。结果表明，浇筑温度和绝热温升的升高增大了混凝土第一主拉应力，增加了开裂的可能性。大体积混凝土在水化热作用下内部温度呈现急升缓降的特点。冷却水管能明显降低大体积混凝土的内外平均温差，减小混凝土的表面应力，但是在内部个别区域出现温度应力集中，可能会导致混凝土内部微裂缝的产生。 Abstract： In order to study the law of temperature field and strain field in the process of hydration heat of mass concrete, the location and time of cracking of mass concrete was explored, and effective anti-cracking measures was put forward. Considering the effect of cooling water, the development process of temperature and temperature stress under different pouring temperature, adiabatic temperature rise and cooling water flow under different ages were simulated. The results show that the increase of pouring temperature and adiabatic temperature rise increases the first main tensile stress of concrete and the possibility of cracking. The internal temperature of mass concrete is characterized by a sharp rise and slow down under the action of hydration heat. The cooling water pipe can obviously reduce the average temperature difference of inside and outside the mass concrete and the surface stress of the concrete, but the temperature stress concentration appears in the internal individual areas, which may lead to the production of micro-cracks inside the concrete.

英文名 : Influence Research of Water Pipe Cooling on Temperature Stress of Mass Concrete

刊期 : ２０19年第8期

关键词 : 冷却水管；大体积混凝土；水化热；温度；数值分析

Key words : Cooling water pipe; Massive concrete; Hydration heat; Temperature; Numerical analysis

刊期 : ２０19年第8期

DOI : 10.19761/j.1000-4637.2019.08.015.04

文章编号 :

基金项目 : 国家自然科学基金项目（51278064）。

作者 : 王修山1，侯宁2

单位 : 1.浙江理工大学建筑工程学院，杭州 310018；2.中国市政工程西北设计研究院有限公司，西安 710075

王修山1，侯宁2

王修山,侯宁.水管冷却对大体积混凝土温度应力的影响研究[J].混凝土与水泥制品,2019(8):15-18.

WANG X S, HOU N.Influence Research of Water Pipe Cooling on Temperature Stress of Mass Concrete[J].China Concrete and Cement Products,2019(8):15-18.

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摘要

参数

结论

参考文献

引用本文

摘要：为了研究大体积混凝土水化过程中的温度和应变规律，探寻大体积混凝土开裂的位置和时间，提出了有效的防裂措施，并考虑冷却水作用，模拟了不同浇筑温度、绝热温升、冷却水流量下大体积混凝土的温度和温度应力在不同龄期下的发展过程。结果表明，浇筑温度和绝热温升的升高增大了混凝土第一主拉应力，增加了开裂的可能性。大体积混凝土在水化热作用下内部温度呈现急升缓降的特点。冷却水管能明显降低大体积混凝土的内外平均温差，减小混凝土的表面应力，但是在内部个别区域出现温度应力集中，可能会导致混凝土内部微裂缝的产生。
Abstract： In order to study the law of temperature field and strain field in the process of hydration heat of mass concrete, the location and time of cracking of mass concrete was explored, and effective anti-cracking measures was put forward. Considering the effect of cooling water, the development process of temperature and temperature stress under different pouring temperature, adiabatic temperature rise and cooling water flow under different ages were simulated. The results show that the increase of pouring temperature and adiabatic temperature rise increases the first main tensile stress of concrete and the possibility of cracking. The internal temperature of mass concrete is characterized by a sharp rise and slow down under the action of hydration heat. The cooling water pipe can obviously reduce the average temperature difference of inside and outside the mass concrete and the surface stress of the concrete, but the temperature stress concentration appears in the internal individual areas, which may lead to the production of micro-cracks inside the concrete.

关键词:

冷却水管；大体积混凝土；水化热；温度；数值分析

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