细观损伤理论在地下工程结构耐久性研究中的应用
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摘要
隧道与地下工程的开挖扰动造成应力的不平衡和重新分配。岩石(土)与衬砌结构两者皆可视为弹塑性体,并且构成相互作用的共同体以抵抗外荷载。岩石与衬砌结构在受到外荷载、地下水渗流、侵蚀性离子的作用时将发生损伤劣化,并进而影响其耐久性与可靠性。详细分析和总结损伤理论应用于混凝土及地下工程结构耐久性研究的现状,探讨和分析Gurson细观损伤模型应用于地下工程混凝土结构的方法、模式及步骤,并结合某工程案例分析和描述典型地下结构(构件)在受力情形下及腐蚀侵入后引起钢筋锈蚀的损伤应力数值计算方法,分析结构的耐久性状况及预测其寿命。
Excavation of tunnelsor underground projects will cause imbalance and redistribution of the stress in them.The rock(soil)and the lining structure both can be regarded as elastic-plastic body,and come into being the interaction community to resist external loads.Damage and deterioration will occur in rock and lining structure when subjected to the effect of external loads,groundwater seepage and erosive ions,which further affect their durability and reliability.In this paper,the current situation of damage theory being used in the durability research of concrete structures and underground projects was analyzed and summarized in detail.Then,Gurson meso-damage-model was discussed and analyzed about its application in underground engineering structures in terms of the method,model and steps.Combined with an engineering case,numerical calculation method of damage stress was analyzed and described about the typical underground structure(component)subjected by corrosion of steel bars under the effect of loads and ion erosion,so that the durability status and life of structure can be analyzed and predicted.
Excavation of tunnelsor underground projects will cause imbalance and redistribution of the stress in them.The rock(soil)and the lining structure both can be regarded as elastic-plastic body,and come into being the interaction community to resist external loads.Damage and deterioration will occur in rock and lining structure when subjected to the effect of external loads,groundwater seepage and erosive ions,which further affect their durability and reliability.In this paper,the current situation of damage theory being used in the durability research of concrete structures and underground projects was analyzed and summarized in detail.Then,Gurson meso-damage-model was discussed and analyzed about its application in underground engineering structures in terms of the method,model and steps.Combined with an engineering case,numerical calculation method of damage stress was analyzed and described about the typical underground structure(component)subjected by corrosion of steel bars under the effect of loads and ion erosion,so that the durability status and life of structure can be analyzed and predicted.
引文
[1]张君,刘骞,王林.混凝土内裂纹沿水泥石,骨料界面或穿透骨料发展的条件[J].清华大学学报(自然科学版),2004,44(3):387-390.
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[8]杨强,陈新,周维垣.岩土材料弹塑性损伤模型及变形局部化分析[J].岩石力学与工程学报,2004(21):3577-3583.
[9]赵宝友,马震岳,梁冰,等.基于损伤塑性模型的地下洞室结构地震作用分析[J].岩土力学,2009,30(5):1515-1521.
[10]王顺意.隧道二衬混凝土在爆破地震波作用下的损伤研究[J].2013(11):76-77.
[11]陆菜平,窦林名.隧道围岩的损伤与声电监测[J].煤炭学报,2004,29(1):41-44.
[12]Tvergaard V,Needle men A.Analysis of the Cup—Cone Fracture in a Round Tensile Ba[J].ACTA metal,1984,32:157-169.
[13]陈会军,李永东,唐立强.多孔材料中裂纹尖端的渐近场[J].哈尔滨工程大学学报,2000,21(3):58-63.
[14]张凯,荆洪阳.Gurson_Tvergaard模型的发展及在韧性断裂分析中的应用[J].压力容器,2004,121(9):37-43.
[15]潘洪科.地下工程砼结构基于碳化作用的耐久性劣化模型[J].工程力学,2008,25(7):172-178.
[2]Dougill J W,Lau J C,Burt N J.Toward a Theoretical Model for Progressive Failure and Softening in Rock,Concrete and Similar Materials[J].Mech in Engng,ASCE-EMD,1976(102):335-355.
[3]Sidoroff.Description of Anisotropic Damage Application to Elasticity[A].Proceedings of IUTAM Colloquium.Physical Nonlinearities in Structural Analysis[C],1981:237-244.
[4]Gurson A L.Continuum Theory of Ductile Rupture by Void Nucleation and Growth,I.Yield Criteria and Flow Rules for Porous Ductile Media[J].J Eng Mater Tech,1977,99:2-15.
[5]杨光松.损伤力学与复合材料损伤[M],国防工业出版社,1995.
[6]李杰,张其云.混凝土随机损伤本构关系[J].同济大学学报,2001,29(10):1135-1141.
[7]李笃权,张克实.细观尺度的混凝土材料损伤[J].西北水资源与水工程,2002,13(1):7-9.
[8]杨强,陈新,周维垣.岩土材料弹塑性损伤模型及变形局部化分析[J].岩石力学与工程学报,2004(21):3577-3583.
[9]赵宝友,马震岳,梁冰,等.基于损伤塑性模型的地下洞室结构地震作用分析[J].岩土力学,2009,30(5):1515-1521.
[10]王顺意.隧道二衬混凝土在爆破地震波作用下的损伤研究[J].2013(11):76-77.
[11]陆菜平,窦林名.隧道围岩的损伤与声电监测[J].煤炭学报,2004,29(1):41-44.
[12]Tvergaard V,Needle men A.Analysis of the Cup—Cone Fracture in a Round Tensile Ba[J].ACTA metal,1984,32:157-169.
[13]陈会军,李永东,唐立强.多孔材料中裂纹尖端的渐近场[J].哈尔滨工程大学学报,2000,21(3):58-63.
[14]张凯,荆洪阳.Gurson_Tvergaard模型的发展及在韧性断裂分析中的应用[J].压力容器,2004,121(9):37-43.
[15]潘洪科.地下工程砼结构基于碳化作用的耐久性劣化模型[J].工程力学,2008,25(7):172-178.
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