环境作用下混凝土结构性能演化与控制研究进展
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摘要
以环境作用下混凝土结构的性能演化与控制为主线,对相关研究成果进行回顾与分析。结果表明,经过二十余年的研究,对环境介质的侵蚀机理、锈蚀混凝土构件的受力性能、结构的时变可靠度等基本理论问题有了清晰的认识;开发了钢筋锈蚀监测和检测、混凝土结构电化学和自修复技术;明确了结构全寿命设计与维护的基本概念。但要建立完善的结构全寿命设计与维护理论,未来尚应在研究方法上以不确定性的研究为主,在研究内容上聚焦时变性,充分关注环境作用的时空变异性和材料细观层面的非匀质性。
The state-of-the-art on performance evolution and control of concrete structures subjected to environmental actions was reviewed and analyzed. It was found that after over 20 years' research, the basic theoretical issues including the ingress mechanisms of environmental media, mechanical behavior of corroded reinforced concrete structural members and time-dependent reliabilities of structures have been extensively studied; the monitoring and inspection techniques for the corrosion of steel bars and the electrochemical rehabilitation and self-healing techniques for concrete structures have been developed; the basic concept for the life-cycle design and maintenance of concrete structures has been proposed. However, it was suggested that for the future development of life-cycle design and maintenance theories of concrete structures, the research methodology should be shifted to indeterminate problems from determinate problems, and the research objectives should be focused on the time-dependent issues, with due focuses on the varying properties of time-dependent and space-dependent environmental actions and the heterogeneous properties of materials in the meso-scale.
The state-of-the-art on performance evolution and control of concrete structures subjected to environmental actions was reviewed and analyzed. It was found that after over 20 years' research, the basic theoretical issues including the ingress mechanisms of environmental media, mechanical behavior of corroded reinforced concrete structural members and time-dependent reliabilities of structures have been extensively studied; the monitoring and inspection techniques for the corrosion of steel bars and the electrochemical rehabilitation and self-healing techniques for concrete structures have been developed; the basic concept for the life-cycle design and maintenance of concrete structures has been proposed. However, it was suggested that for the future development of life-cycle design and maintenance theories of concrete structures, the research methodology should be shifted to indeterminate problems from determinate problems, and the research objectives should be focused on the time-dependent issues, with due focuses on the varying properties of time-dependent and space-dependent environmental actions and the heterogeneous properties of materials in the meso-scale.
引文
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[2] CARE S. Influence of aggregates on chloride diffusion coefficient into mortar[J]. Cement and Concrete Research, 2003, 33(7): 1021-1028.
[3] BAROGHEL-BOUNY V, MAINGUY M, LASSABATERE T, et al. Characterization and identification of equilibrium and transfer moisture properties for ordinary and high-performance cementitious materials[J]. Cement and Concrete Research, 1999, 29(8): 1225-1238.
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[5] QIAN C, CHEN D, WANG H, et al. Simultaneous heat and moisture transfer in concrete with time-dependent boundary conditions[J]. Magazine of Concrete Research, 2008, 60(10): 725-733.
[6] PAPADAKIS V G, VAYENAS C G, FARDIS M N. Fundamental modeling and experimental investigation of concrete carbonation[J]. ACI Materials Journal, 1991, 88(4): 363-373.
[7] 李果,袁迎曙,耿欧. 气候条件对混凝土碳化速度的影响[J]. 混凝土, 2004(11): 49-51. (LI Guo, YUAN Yingshu, GENG Ou. Influences of climate conditions to the concrete carbonization rates[J]. Concrete, 2004(11): 49-51. (in Chinese))
[8] 张云升,孙伟,陈树东,等. 弯拉应力作用下粉煤灰混凝土的1D和2D碳化[J]. 东南大学学报(自然科学版), 2007, 37(1): 118-122.(ZHANG Yunsheng, SUN Wei, CHEN Shudong, et al. 1D and 2D carbonation of fly ash concrete under flexural stress[J]. Journal of Southeast University (Natural Science Edition), 2007, 37(1): 118-122. (in Chinese))
[9] JIANG C, GU X L, ZHANG W P, et al. Modeling of carbonation in tensile zone of plain concrete beams damaged by cyclic loading[J]. Construction and Building Materials, 2015,77: 479- 488.
[10] JIANG C, HUANG Q H, GU X L, et al. Experimental investigation on carbonation in fatigue-damaged concrete[J]. Cement and Concrete Research,2017,99:38-52.
[11] JIANG C, GU X L, HUANG Q H, et al. Carbonation depth predictions in concrete bridges under changing climate conditions and increasing traffic loads[J]. Cement and Concrete Composites, 2018, 93: 140-154.
[12] 金伟良,延永东,王海龙. 氯离子在受荷混凝土内的传输研究进展[J]. 硅酸盐学报, 2010, 38(11): 2217-2224.(JIN Weiliang, YAN Yongdong, WANG Hailong. Research progress on the chloride transportation in stressed concrete[J]. Journal of the Chinese Ceramic Society, 2010, 38(11): 2217-2224.(in Chinese))
[13] SUN C, CHEN J, ZHU J, et al. A new diffusion model of sulfate ions in concrete[J]. Construction and Building Materials, 2013, 39: 39- 45.
[14] HOSSACK A M, THOMAS M D A. The effect of temperature on the rate of sulfate attack of Portland cement blended mortars in Na2SO4 solution[J]. Cement and Concrete Research, 2015, 73: 136-142.
[15] JIANG Z L, HUANG Q H, XI Y P, et al. Experimental study of diffusivity of the interfacial transition zone between cement paste and aggregate[J]. Journal of Materials in Civil Engineering, 2016, 28(10):04016109.
[16] 牛荻涛,孙丛涛. 混凝土碳化与氯离子侵蚀共同作用研究[J]. 硅酸盐学报, 2013, 41(8): 1094-1099.(NIU Ditao, SUN Congtao. Study on interaction of concrete carbonation and chloride corrosion[J]. Journal of the Chinese Ceramic Society, 2013, 41(8): 1094-1099.(in Chinese))
[17] 付传清,屠一军,金贤玉,等. 荷载作用对混凝土中氯盐传输的影响研究进展[J]. 硅酸盐学报, 2015, 43(4): 400- 410. (FU Chuanqing, TU Yijun, JIN Xianyu, et al. Load effect on chloride transportation in concrete: a short review[J]. Journal of the Chinese Ceramic Society,2015,43(4):400- 410.(in Chinese))
[18] HUANG Q H, JIANG Z L, ZHANG W P, et al. Numerical analysis of the effect of coarse aggregate distribution on concrete carbonation[J]. Construction and Building Materials, 2012, 37: 27-35.
[19] HUANG Q H, JIANG Z L, GU X L, et al. Numerical simulation of moisture transport in concrete based on a pore size distribution model[J]. Cement and Concrete Research,2015, 67: 31- 43.
[20] BAZANT Z P. Physical model for steel corrosion in concrete sea structures: theory[J]. Journal of the Structural Division, 1979, 105(6): 1137-1153.
[21] ALONSO C, ANDRADE C, GONZALEZ J A. Relation between resistivity and corrosion rate of reinforcements in carbonated mortar made with several cement types[J]. Cement and Concrete Research, 1988, 18(5): 687- 698.
[22] RAUPACH W. Investigations on the influence of oxygen on corrosion of steel in concrete: part Ⅰ[J]. Materials and Structures, 1996, 29(3): 174-184.
[23] RAUPACH M. Investigations on the influence of oxygen on corrosion of steel in concrete: part Ⅱ[J]. Materials and Structures, 1996, 29(4): 226-232.
[24] RAUPACH M. Models for the propagation phase of reinforcement corrosion: an overview[J]. Materials and Corrosion, 2006, 57(8): 605- 613.
[25] HORNBOSTEL K, ANGST U M, ELSENER B, et al. On the limitations of predicting the ohmic resistance in a macro-cell in mortar from bulk resistivity measurements[J].Cement and Concrete Research, 2015,76:147-158.
[26] LIU T, WEYERS R W. Modeling the dynamic corrosion process in chloride contaminated concrete structures[J]. Cement and Concrete Research, 1998, 28(3): 365-379.
[27] AHAMD S, BHATTACHARJEE B. Empirical modelling of indicators of chloride-induced rebar corrosion[J]. Journal of Structural Engineering, 2000, 27(3): 195-207.
[28] ZHANG W P, SONG X B, GU X L, et al. Tensile and fatigue behavior of corroded rebars[J]. Construction and Building Materials, 2012, 34: 409- 417.
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