基于能量耗散碾压混凝土重力坝地震损伤分析
|
摘要
采用塑性损伤力学对混凝土重力坝进行非线性动力分析,通过研究塑性损伤本构中滞回曲线的特点以及地震中重力坝裂缝发展特征和结构能量耗散机理,建立了包含能量特性的大坝整体损伤评价指标。通过分析发现强震作用下坝体上部的损伤是结构的主要损伤,地震中的能量以结构阻尼耗散能量为主,混凝土损伤和塑性耗散的能量所占比例不大,但与裂缝的发展有直接关系。提出的大坝整体损伤指标可以综合的反应结构的整体损伤程度,以此对结构进行抗震设计,可以提高结构的抗震性能。
Nonlinear seismic analysis of a concrete gravity dam was performed based on the plastic damage theory.Its hysteretic feature,energy dissipation ability,failure mechanism and characteristics were studied.A seismic damage assessment model considering damage energy dissipation was developed for describing the damage level of the dam under strong earthquakes.The results showed that the damage of the upper part of the dam is the main damage of the structure;the vibration energy and the earthquake responses of the structure are reduced effectively by the structural damping;little amount of the seismic energy is dissipated by concrete damage and plastic dissipation.The seismic damage assessment model could quantitatively evaluate the damage level of gravity dams under strong earthquake.
Nonlinear seismic analysis of a concrete gravity dam was performed based on the plastic damage theory.Its hysteretic feature,energy dissipation ability,failure mechanism and characteristics were studied.A seismic damage assessment model considering damage energy dissipation was developed for describing the damage level of the dam under strong earthquakes.The results showed that the damage of the upper part of the dam is the main damage of the structure;the vibration energy and the earthquake responses of the structure are reduced effectively by the structural damping;little amount of the seismic energy is dissipated by concrete damage and plastic dissipation.The seismic damage assessment model could quantitatively evaluate the damage level of gravity dams under strong earthquake.
引文
[1]Yazdchi M,Khalili N,Valliappan S.Non-linear seismic be-havior of concrete gravity dams using coupled finite-boundaryelement technique[J].International Journal for NumericalMethods in Engineering,1999,44(6):101-130.
[2]Faria R,Oliver J,Cervera M.Modeling material failure inconcrete structures under cyclic actions[J].Journal of Struc-tural Engineering,2004,130(12):1997-2005.
[3]Mirzabozorg H,Ghaemian M.Non-linear behavior of massconcrete in three-dimensional problems using a smeared crackapproach[J].Earthquake Engineering and Structural Dynam-ics,2005,34(3):247-269.
[4]杜成斌,苏擎柱.混凝土坝地震动力损伤分析[J].工程力学,2003,20(5):170-173.
[5]龙渝川,张楚汉,迟福东,等.混凝土重力坝抗震配筋加固措施的效果研究[J].水力发电学报,2008,27(4):77-82.
[6]Valliappan S,Yazdchi M,Khalili N.Seismic analysis of archdams-a continuum damage mechanics approach[J].Interna-tional Journal for Numerical Methods in Engineering,1999,45(11):1695-1724.
[7]Ghrib F,Tinawi R.An application of damage mechanics forseismic analysis of concrete gravity dams[J].Earthquake En-gineering and Structural Dynamics,1995,24(2):157-173.
[8]Lee J,Fenves G L.A plastic-damage concrete model forearthquake analysis of dams[J].Earthquake Engineering andStructural Dynamics,1998,27(9):937-956.
[9]张我华,邱战洪,余功栓.地震荷载作用下坝及其岩基的脆性动力损伤分析[J].岩石力学与工程学报,2004,23(8):1311-1317.
[10]邱战洪,张我华,任廷鸿.地震作用下大坝系统的非线性动力损伤分析[J].水利学报,2005,36(5):629-636.
[11]邵长江,钱永久.Koyna混凝土重力坝的塑性地震损伤响应分析[J].振动与冲击,2006,25(4):129-182.
[12]沈怀至,张楚汉,寇立夯.基于功能的混凝土重力坝地震破坏评价模型[J].清华大学学报(自然科学版),2007,47(12):2114-2118.
[13]沈怀至,张楚汉,金峰.基于性能的重力坝坝基交界面地震抗滑稳定评价[J].水力发电学报,2009,28(1):137-142.
[14]Lee J,Fenves G L.Plastic-Damage Model for Cyclic Loadingof Concrete Structures[J].Journal of Engineering Mechan-ics,1998,124(8):892-900.
[15]Lubliner J,Oliver J,Oller S,et al.A Plastic-Damage Modelfor Concrete[J].International Journal of Solids and Struc-tures,1989,25(3):229-326.
[16]Bhattacharjee S S,Leger P.Seismic cracking and energy dis-sipation in concrete gravity dams[J].Earthquake Engineer-ing and Structural Dynamics.1993,22(11):991-1007.
[2]Faria R,Oliver J,Cervera M.Modeling material failure inconcrete structures under cyclic actions[J].Journal of Struc-tural Engineering,2004,130(12):1997-2005.
[3]Mirzabozorg H,Ghaemian M.Non-linear behavior of massconcrete in three-dimensional problems using a smeared crackapproach[J].Earthquake Engineering and Structural Dynam-ics,2005,34(3):247-269.
[4]杜成斌,苏擎柱.混凝土坝地震动力损伤分析[J].工程力学,2003,20(5):170-173.
[5]龙渝川,张楚汉,迟福东,等.混凝土重力坝抗震配筋加固措施的效果研究[J].水力发电学报,2008,27(4):77-82.
[6]Valliappan S,Yazdchi M,Khalili N.Seismic analysis of archdams-a continuum damage mechanics approach[J].Interna-tional Journal for Numerical Methods in Engineering,1999,45(11):1695-1724.
[7]Ghrib F,Tinawi R.An application of damage mechanics forseismic analysis of concrete gravity dams[J].Earthquake En-gineering and Structural Dynamics,1995,24(2):157-173.
[8]Lee J,Fenves G L.A plastic-damage concrete model forearthquake analysis of dams[J].Earthquake Engineering andStructural Dynamics,1998,27(9):937-956.
[9]张我华,邱战洪,余功栓.地震荷载作用下坝及其岩基的脆性动力损伤分析[J].岩石力学与工程学报,2004,23(8):1311-1317.
[10]邱战洪,张我华,任廷鸿.地震作用下大坝系统的非线性动力损伤分析[J].水利学报,2005,36(5):629-636.
[11]邵长江,钱永久.Koyna混凝土重力坝的塑性地震损伤响应分析[J].振动与冲击,2006,25(4):129-182.
[12]沈怀至,张楚汉,寇立夯.基于功能的混凝土重力坝地震破坏评价模型[J].清华大学学报(自然科学版),2007,47(12):2114-2118.
[13]沈怀至,张楚汉,金峰.基于性能的重力坝坝基交界面地震抗滑稳定评价[J].水力发电学报,2009,28(1):137-142.
[14]Lee J,Fenves G L.Plastic-Damage Model for Cyclic Loadingof Concrete Structures[J].Journal of Engineering Mechan-ics,1998,124(8):892-900.
[15]Lubliner J,Oliver J,Oller S,et al.A Plastic-Damage Modelfor Concrete[J].International Journal of Solids and Struc-tures,1989,25(3):229-326.
[16]Bhattacharjee S S,Leger P.Seismic cracking and energy dis-sipation in concrete gravity dams[J].Earthquake Engineer-ing and Structural Dynamics.1993,22(11):991-1007.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心