目的 以某跨河水利枢纽泄洪闸闸墩底板为研究对象,明确环境温度与浇筑温度对大体积混凝土温度应力的定量影响机制。方法 基于瞬态热传导-结构热应力顺序耦合有限元方法,建立“底板-基岩”三维模型。结合工程实例,对温度参数耦合作用下温度应力时序变化进行研究。结果 当环境温度升高时,温度应力降低,最大拉应力出现时间延后（每升高5 ℃延后1 d）,第一主应力降低率增加;当浇筑温度升高时,温度应力增大,最大拉应力出现时间提前（每升高10 ℃提前1 d）,第一主应力增长率增加（浇筑温度与环境温差超5 ℃时,增长率可达0.032 MPa/℃）。结论 环境温度和浇筑温度对混凝土温度应力作用效果相反,环境温度影响混凝土表层温度扩散,浇筑温度影响混凝土内部热量聚集。在工程中,宜选择环境温度较高或升温期浇筑,并控制浇筑温度与环境温差在±5 ℃以内,以最小化温度应力峰值。
Abstract
With the sluice pier base slab of a river-crossing hydraulic complex as the research object, the work aims to clarify the quantitative effect mechanism of ambient temperature and pouring temperature on the thermal stress of mass concrete. A three-dimensional “base slab-bedrock” model was established based on the sequential coupling finite element method of tran-sient heat conduction and structural thermal stress. Combined with an engineering case, the temporal variation of thermal stress under the coupling effect of temperature parameters was investigated. When the ambient temperature increased, the thermal stress decreased, the occurrence time of the maximum tensile stress was delayed (by 1 day for every 5 ℃ increase), and the reduction rate of the first principal stress increased. When the pouring temperature increased, the thermal stress in-creased, the occurrence time of the maximum tensile stress advanced (by 1 day for every 10 ℃ increase), and the growth rate of the first principal stress increased (when the difference between pouring temperature and ambient temperature exceeded 5 ℃, the growth rate reached 0.032 MPa/℃). Ambient temperature and pouring temperature have opposite effects on the thermal stress of concrete: ambient temperature affects the surface temperature diffusion of concrete, while pouring tem-perature affects the internal heat accumulation of concrete. In engineering practice, it is advisable to pour concrete when the ambient temperature is relatively high or during a temperature rising period, and to control the difference between pouring temperature and ambient temperature within ±5 ℃ to minimize the peak thermal stress.
关键词
大体积混凝土 /
温度因素 /
作用机制 /
数值模型 /
温度应力 /
时序变化
Key words
mass concrete /
temperature factor /
mechanism /
numerical model /
temperature stress /
temporal variation
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] YANG K B, ZHANG W, CHEN R S, et al.Simulation Analysis of Temperature Field and Stress Field of Mass Concrete under Different Construction Temperatures[J]. Buildings, 2025, 15(3): 370.
[2] YU Z, HE Y L, TAN F, et al.Three-Dimensional Numerical Manifold Method for Thermal Stress Calculation of Mass Concrete[J]. Construction and Building Materials, 2025, 491: 142769.
[3] 仇安兵. 基于热-力耦合有限元的大体积混凝土裂缝演化分析[J]. 工程科学学报, 2025, 47(5): 995-1004.
QIU A B.Analysis of Crack Evolution in Large-Volume Concrete Based on Thermal Mechanical Coupling Finite Element Method[J]. Chinese Journal of Engineering, 2025, 47(5): 995-1004.
[4] 康瑞强, 施成华, 孙晓贺, 等. 基于响应面-粒子群算法的大体积混凝土温度裂缝控制方法[J]. 中南大学学报(自然科学版), 2024, 55(12): 4505-4518.
KANG R Q, SHI C H, SUN X H, et al.Method for Controlling Temperature Cracks in Mass Concrete Based on Response Surface and Particle Swarm Algorithm[J]. Journal of Central South University (Science and Technology), 2024, 55(12): 4505-4518.
[5] CAO W, LIANG N H, PENG L, et al.Study the Influence of Basalt Fiber on Temperature Cracks in Mass Concrete Pile Cap[J]. Structures, 2025, 80: 109851.
[6] 李潘武, 曾宪哲, 李博渊, 等. 浇筑温度对大体积混凝土温度应力的影响[J]. 长安大学学报(自然科学版), 2011, 31(5): 68-71.
LI P W, ZENG X Z, LI B Y, et al.Influence of Placement Temperature on Mass Concrete Temperature Stress[J]. Journal of Chang'an University (Natural Science Edition), 2011, 31(5):: 68-71.
[7] 薛自新, 马军, 余梁蜀, 等. 基于SIMULINK的混凝土浇筑温度仿真研究[J]. 武汉大学学报(工学版), 2002, 35(6): 41-43.
XUE Z X, MA J, YU L S, et al.Emulation Research on Concrete Construction Temperature Based on SIMULINK[J]. Engineering Journal of Wuhan University, 2002, 35(6): 41-43.
[8] 赵代深. 确定混凝土坝浇筑温度的三维仿真数值方法[J]. 水利水电技术, 2002, 33(10): 1-4.
ZHAO D S.Three-Dimensional Simulation Numerical Nethod of Defining Concrete Placing Temperature of Concrete Dams[J]. Water Resources and Hydropower Engineering, 2002, 33(10): 1-4.
[9] 朱岳明, 贺金仁, 刘勇军. 龙滩高RCC重力坝夏季不同浇筑温度的温控防裂研究[J]. 水力发电, 2002, 28(11): 32-36.
ZHU Y M, HE J R, LIU Y J.Temperature Control and Cracking Prevention of Longtan High RCC Gravity Dam with Different Concrete Placement Temperatures in Summer[J]. Water Power, 2002, 28(11): 32-36.
[10] 王振宇, 王起才, 代金鹏, 等. 冬季大体积混凝土水化热温度场数值模拟研究[J]. 混凝土, 2018(11): 140-144.
WANG Z Y, WANG Q C, DAI J P, et al.Research on the Analogy of Temperature Field Figure on the Heat of Hydration in Mass Concrete in Winter[J]. Concrete, 2018(11): 140-144.
[11] 梁庆, 李洋波, 施亚运, 等. 严寒地区某碾压混凝土重力坝施工期表面保温措施研究[J]. 水电能源科学, 2017, 35(8): 83-86.
LIANG Q, LI Y B, SHI Y Y, et al.Study on Superficial Heat Preservation Measures of RCC Gravity Dam in Cold Region[J]. Water Resources and Power, 2017, 35(8): 83-86.
[12] 王桂玉. 大体积混凝土温度应力问题研究分析[D]. 郑州: 郑州大学, 2015.
WANG G Y.Research and Analysis on Temperature Stress Problems of Mass Concrete[D]. Zhengzhou: Zhengzhou University, 2015.
[13] 焦运攀, 杨朔, 余以明. 巴基斯坦某护岸大体积混凝土开裂风险评估及裂缝控制技术[J]. 混凝土, 2019(2): 150-155.
JIAO Y P, YANG S, YU Y M.Risk Assessment of a Revetment Mass Concrete Cracking and Crack Control Technology in Pakistan[J]. Concrete, 2019(2): 150-155.
[14] 马旭超. 外界环境变化对大体积混凝土承台内部温度效应的影响[D]. 武汉: 武汉理工大学, 2017.
MA X C.Effect of Changes in the External Environment on Internal Temperature of Mass Concreted Bearing Platform[D]. Wuhan: Wuhan University of Technology, 2017.
[15] 赖引明, 张涛, 王文国, 等. 钢混结合段大体积超高性能混凝土性能的研究[J]. 材料导报, 2024, 38(S2): 187-192.
LAI Y M, ZHANG T, WANG W G, et al.Study on the Performance of Large-Volume Ultra-High Performance Concrete(UHPC)in the Steel-Concrete Composite Joint Segment[J]. Materials Reports, 2024, 38(S2): 187-192.
[16] LIU J X, ZHANG J J, LU S, et al.Multi-Scale Performance of Large-Volume Concrete under Dual Control of Temperature and Deformation[J]. Construction and Building Materials, 2024, 454: 139116.
[17] KLEMCZAK B, SMOLANA A.Multi-Step Procedure for Predicting Early-Age Thermal Cracking Risk in Mass Concrete Structures[J]. Materials, 2024, 17(15): 3700.
[18] 潘利, 徐文, 梁志雯, 等. 常泰长江大桥主航道桥主墩承台大体积混凝土抗裂技术研究[J]. 桥梁建设, 2024, 54(3): 8-14.
PAN L, XU W, LIANG Z W, et al.Research on Cracking Control Techniques for Large-Volume Concrete Pile Caps Supporting Pylon Piers of Main Navigational Channel Bridge of Changtai Changjiang River Bridge[J]. Bridge Construction, 2024, 54(3): 8-14.
[19] KVOČKA D, ŠUŠTERŠIČ J, MAUKO PRANJIĆ A, et al. Mass Concrete with EAF Steel Slag Aggregate: Workability, Strength, Temperature Rise, and Environmental Performance[J]. Sustainability, 2022, 14(23): 15502.
[20] 郑伟, 袁中夏, 乔宏霞, 等. 考虑水化度影响的大体积混凝土温度场分析[J]. 材料导报, 2024, 38(S1): 254-260.
ZHENG W, YUAN Z X, QIAO H X, et al.Analysis of Temperature Field of Mass Concrete Considering the Effect of Hydration Degree[J]. Materials Reports, 2024, 38(S1): 254-260.
[21] XIN J D, JIANG X M, CHEN Z Y, et al.Early Age Thermal Cracking Resistance of Basalt Fiber-Reinforced Concrete for Mass Concrete Structures under Restraint Condition[J]. Structures, 2022, 45: 1189-1198.
[22] SMOLANA A, KLEMCZAK B, AZENHA M, et al.Thermo-Mechanical Analysis of Mass Concrete Foundation Slabs at Early Age—Essential Aspects and Experiences from the FE Modelling[J]. Materials, 2022, 15(5): 1815.
[23] 李志鹏, 罗奇星, 韩庆华, 等. 大体积混凝土墙水化放热温度场分析[J]. 天津大学学报(自然科学与工程技术版), 2023, 56(8): 878-885.
LI Z P, LUO Q X, HAN Q H, et al.Analytical Solution for the Temperature Field of the Hydration Heat in a Mass Concrete Wall[J]. Journal of Tianjin University (Science and Technology), 2023, 56(8): 878-885.
[24] TASRI A, SUSILAWATI A.Effect of Material of Post-Cooling Pipes on Temperature and Thermal Stress in Mass Concrete[J]. Structures, 2019, 20: 204-212.
[25] 王晴, 任晓丹. 基于徐变损伤理论的早龄期大体积混凝土化学-热-力多场耦合模型研究[J]. 工程力学, 2023, 40(3): 225-237.
WANG Q, REN X D.Chemical-Thermal-Mechanical Multi-Field Coupling Model for Early-Age Mass Concrete Based on Creep Damage Theory[J]. Engineering Mechanics, 2023, 40(3): 225-237.
基金
河南省科技攻关项目（252102241011,262102320180）; 河南省高等学校重点科研项目（24A413004）; “十四五”国家重点研发计划-“城市供水和排水管网病害智能诊断关键技术与装备”（2022YFC3801001）; 河南省高等学校重点科研项目（23A560013）; 河南省青年基金项目（232300421328）
PDF(3287 KB)
