Koyna混凝土重力坝的塑性地震损伤响应分析
|
摘要
考虑了混凝土拉压异性损伤变量,根据相关流动法则推导了混凝土的损伤本构方程。通过有限元方法模拟坝体在地震激励下的非线性损伤演化过程,数值计算过程中考虑了库坝动力耦合及混凝土后继屈服的强化效应,采用四参数O ttosen屈服准则及相应的损伤型本构,算例验证了Koyna混凝土重力坝在竖向和横向实测地震激励下的非线性损伤响应特性。
Damage varible is considered due to difference of tension and compression of concrete.According to the associated flow rule the damage constitutive formulation is deduced.By finite element method(FEM),the plastic damage mechanical model is used to simulate nonlinear damage evolution of a Koyna concrete gravity dam subjected seismic excitations with hydrodynamic interaction between the dam and the reservoir.The strengthening effects of the postyielding of concrete,and the modified four-parameter Ottosen-type yielding criterion combined with the drivative constitutive relationship are taken in account. Examples show that the nonlinear seismic damage response characteristics of the Koyna dam subjected to the horizontal and vertical seismic waves are verified.
Damage varible is considered due to difference of tension and compression of concrete.According to the associated flow rule the damage constitutive formulation is deduced.By finite element method(FEM),the plastic damage mechanical model is used to simulate nonlinear damage evolution of a Koyna concrete gravity dam subjected seismic excitations with hydrodynamic interaction between the dam and the reservoir.The strengthening effects of the postyielding of concrete,and the modified four-parameter Ottosen-type yielding criterion combined with the drivative constitutive relationship are taken in account. Examples show that the nonlinear seismic damage response characteristics of the Koyna dam subjected to the horizontal and vertical seismic waves are verified.
引文
1 Lub liner J,O liver J,O ller S,Oňate E.A P lastic-dam ageModelfor Concrete.Int.J.Solids Structures.1989,25(3):299—326
2 Jeeho Lee,G regory L Fenves.P lastic-dam age Model for Cyc licLoad ing of Concrete Structures.Journal of Engineering M echan-ics.1998,124(8):892—900
3 Jeeho Lee,G regory L Fenves.A P lastic-Dam age ConcreteMod-el for Earthquake Analysis of Dam s.Earthquake Engineering andStructural Dynam ics.27,1998:937—956
4陈惠发、萨里普著.余天庆等译.混凝土和土的本构方程.北京:中国建筑工业出版社,2004年6月第一版:25—29
5 Bangash M Y H.Concrete and Concrete Structures:Num ericalModeling and App lications,E lsevierApp lied Sc ience London andNew York.1989,47—51
6 Chen W F.P lastic ity in Re inforced Concrete.M cG raw-H illBook Company.New York and London.1982,225—235
7宋玉普.多种混凝土材料的本构关系和破坏准则[M].北京:中国水利水电出版社,2002年12月第一版:71、253
8 W estergaard H M.W ater Pressures on Dam s during Earth-quakes.Transactions of the Am erican Soc iety of C ivil Engineers,1933,98:418—433
9过镇海等.钢筋混凝土原理和分析.北京:清华大学出版社,2003:24—33
10 Lem aitre L著,倪金刚等译.损伤力学教程[M].北京:科学出版社,1996:16—25
2 Jeeho Lee,G regory L Fenves.P lastic-dam age Model for Cyc licLoad ing of Concrete Structures.Journal of Engineering M echan-ics.1998,124(8):892—900
3 Jeeho Lee,G regory L Fenves.A P lastic-Dam age ConcreteMod-el for Earthquake Analysis of Dam s.Earthquake Engineering andStructural Dynam ics.27,1998:937—956
4陈惠发、萨里普著.余天庆等译.混凝土和土的本构方程.北京:中国建筑工业出版社,2004年6月第一版:25—29
5 Bangash M Y H.Concrete and Concrete Structures:Num ericalModeling and App lications,E lsevierApp lied Sc ience London andNew York.1989,47—51
6 Chen W F.P lastic ity in Re inforced Concrete.M cG raw-H illBook Company.New York and London.1982,225—235
7宋玉普.多种混凝土材料的本构关系和破坏准则[M].北京:中国水利水电出版社,2002年12月第一版:71、253
8 W estergaard H M.W ater Pressures on Dam s during Earth-quakes.Transactions of the Am erican Soc iety of C ivil Engineers,1933,98:418—433
9过镇海等.钢筋混凝土原理和分析.北京:清华大学出版社,2003:24—33
10 Lem aitre L著,倪金刚等译.损伤力学教程[M].北京:科学出版社,1996:16—25
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