Analysis Model on Deterioration of Ordinary Silicate Concrete under High Temperature

LI Zhongyou

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Analysis Model on Deterioration of Ordinary Silicate Concrete under High Temperature

更新时间：2025-09-25

- Analysis Model on Deterioration of Ordinary Silicate Concrete under High Temperature
- Issue 2, Pages: 229-235(2020)
- 作者机构：
  
  中国人民解放军93055部队,辽宁,沈阳,110021
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU528
- Published：2020
- 稿件说明：
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李忠友,刘元雪,姚志华.普通硅酸盐混凝土高温性能劣化分析模型∗[J].防灾减灾工程学报,2020,(2):229-235

LI Zhongyou. Analysis Model on Deterioration of Ordinary Silicate Concrete under High Temperature[J]. 2020, (2): 229-235.
李忠友,刘元雪,姚志华.普通硅酸盐混凝土高温性能劣化分析模型∗[J].防灾减灾工程学报,2020,(2):229-235 DOI：

LI Zhongyou. Analysis Model on Deterioration of Ordinary Silicate Concrete under High Temperature[J]. 2020, (2): 229-235. DOI：

摘要

混凝土材料的高温力学性能劣化规律是混凝土结构防火设计及灾后评估的重要依据。基于普通硅酸盐混凝土材料内部各组分在高温作用下的微观物理化学变化，研究了硬化水泥浆中水化物高温分解和骨料材料性能的劣化过程，揭示了混凝土在高温作用下宏观力学性能劣化的机理，建立了用于描述普通硅酸盐混凝土高温力学性能劣化规律的分析模型，在传统模型仅能考虑温度大小影响的基础上进一步考虑温度持续时间对材料力学性能劣化的影响。利用FLAC3D软件中的FISH语言开发了相应的计算程序，并用于分析混凝土试块在不同温度和时间作用下材料抗压强度和弹性模量等随温度的劣化规律，与现有试验结果对比表明模型能够合理反映混凝土在高温作用下材料性能的劣化过程。

Abstract

The deterioration of mechanical properties of concrete at high temperature plays an important role in fire prevention design and assessment of concrete structure after fire. On the basis of the microscopic physical and chemical changes of inner components in concrete

the thermal decomposition process of hydrates and the thermal damage process of aggregate at high temperature were studied

and then an analysis model for material properties description of concrete at high temperature was put forward. This model can not only take into account the influence of temperature amplitude as traditional methods

but also consider the impact of temperature duration. The corresponding computer program was developed by the FISH language in the fast Lagrangian analysis of continua (FLAC3D). The program was then used to analyze the change law of compressive strength and elastic modulus of test blocks under different temperature amplitude and temperature duration. The simulation results agree well with those of experimental tests. It indicates that the model is correct and feasible.

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references

过镇海,李卫.混凝土在不同应力-温度途径下的变形试验和本构关系[J].土木工程学报,1993,26(5):58-69. Guo Zh H,Li W.Deformation testing and constitutive relationship of concrete under different stress-temperature paths [J].China Civil Engineering Journal,1993,26(5):58-69.(in Chinese)

李卫,过镇海.高温下砼的强度和变形性能试验研究[J].建筑结构学报,1993,14(1):8-16. Li W,Guo Zh H.Experimental investigation of strength and deformation of concrete at elevated temperature [J].Journal of Building Structures,1993,14(1):8-16.(in Chinese)

陆洲导.钢筋混凝土梁对火灾反应的研究[D].上海:同济大学,1989. Lu Zh D.Research on the fire reflects of reinforced concrete beam [D].Shanghai:Tongji University,1989.(in Chinese)

Lie T T,Irwin R J.Fire resistance of rectangular steel columns filled with bar-reinforced concrete [J].Structural Engineering,1995,121(5):797-805.

Ulm F J,Coussy O,Bazant Z P.The “Chunnel” fire,I:chemo plastic softening in rapidly heated concrete[J]. Journal Engineering of Mechanics,ASCE,1999,125(3),272-282.

Luccioni B M,Figueroa M I,Danesi R F.Thermo-mechanic model for concrete exposed to elevated temperatures[J].Engineering Structures,2003,25(5):729-742.

朋改非,王金羽,Chan Y N S,等.火灾高温下硬化水泥浆的化学分解特征[J].南京信息工程大学学报(自然科学版),2009,1(1):76-81. Peng G F,Wang J Y,Chan Y N S,et al.Chemical decomposition characteristics of hardened cement paste subjected to high temperature of fire [J].Journal of Nanjing University of Information Science and Technology(Natural Science Edition),2009,l(1):76-81.(in Chinese)

Sakr K,EL-Hakim E.Effect of high temperature or fire on heavy weight concrete properties [J].Cement and Concrete Research,2005,35:590-596.

Ivanka N,Ivana K,Ivica G.The effect of high temperatures on the mechanical properties of concrete made with different types of aggregates[J].Fire Safety Journal,2011,46:425-430.

Khoury G A,Majorana C E,Pesavento F,et al.Modeling of heated concrete [J].Magazine of Concrete Research,2002,54:77-101.

吕天启,赵国藩,林志伸,等.高温后静止混凝土的微观分析[J].建筑材料学报,2003,6(2):135-141. Lyu T Q,Zhao G F,Lin Zh Sh,et al.Microscopic analysis of long standing concrete after high temperature [J].Journal of Building Materials,2003,6(2):135-141.(in Chinese)

Lee J,Xi Y P,Kaspar W,et al.A multiscale model for modulus of elasticity of concrete at high temperatures [J].Cement and Concrete Research.2009,39(9):754–762.

Mu J,Perlmutter D D.Thermal decomposition of carbonates,carboxylates,oxalates,acetates,formates and hydroxides [J].Thermochimica Acta,1981,49(2-3):207-218.

Criado J M,Morales J.On the thermal decomposition mechanism for the dehydroxylation of alkaline earth hydroxides [J].Journal of Thermal Analysis,1976,10:103-110.

时旭东,刘超,李亮,等.亚高温持续作用混凝土受压强度试验研究[J].建筑科学,2011,41(8):106-109. Shi X D,Liu Ch,Li L,et al.Experimental study on compressive strength of concrete under lasting sub-high temperature[J].Journal of Building Structures,2011,41(8):106-109.(in Chinese)

Xi Y,Ghadi M E,Suwito S S.A damage theory based on composite mechanics[J].Journal of Engineering Mechanics,ASCE,2006,132(11):1-10.

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