Effects of shear keys on nonlinear seismic responses of an arch-gravity dam  

作　　者：JIANG ShouYan 1,DU ChengBin 1 &YUAN JuWei 2 1 Department of Engineering Mechanics,Hohai University,Nanjing 210098,China 2 Jiangsu Hongji Science and Technology Company.,Ltd.,Nanjing 210008,China 

出　　处：《Science China(Technological Sciences)》2011年第S1期18-27,共10页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.50539030,50779011,11132003);the National Basic Research Program of China("973"Project)(Grant No.2007CB714104);the Innovative Project for Graduate Students of Jiangsu Province (Grant No.CX10B_202Z)

摘　　要：In the paper,the added tangential nonlinear springs are introduced to represent the effects of one-way and two-way shear keys. The added tangential stiffness coefficient is relative to the joint opening and the relative tangential movement and determined numerically by using a refined model of shear keys.The user subroutine of nonlinear spring elements has been implemented into ABAQUS program.The seismic responses of an arch-gravity dam are mainly examined.It is shown by the results that a significant increase of about 17%-30%in joint opening can be observed for the dam with one-way shear keys;the two-way shear keys are beneficial to restrain the sliding displacement along both the radial and vertical directions,whereas the one-way shear keys mainly restrain the displacement along the radial direction;for the dam with shear keys,the maximum arch stress is increased,the cantilever stress is reduced,and the location of the maximum cantilever stress is also moved from the dam heel to the midheight of the cantilever.In the paper,the added tangential nonlinear springs are introduced to represent the effects of one-way and two-way shear keys. The added tangential stiffness coefficient is relative to the joint opening and the relative tangential movement and determined numerically by using a refined model of shear keys.The user subroutine of nonlinear spring elements has been implemented into ABAQUS program.The seismic responses of an arch-gravity dam are mainly examined.It is shown by the results that a significant increase of about 17%-30%in joint opening can be observed for the dam with one-way shear keys;the two-way shear keys are beneficial to restrain the sliding displacement along both the radial and vertical directions,whereas the one-way shear keys mainly restrain the displacement along the radial direction;for the dam with shear keys,the maximum arch stress is increased,the cantilever stress is reduced,and the location of the maximum cantilever stress is also moved from the dam heel to the midheight of the cantilever.

关 键 词：seismic responses arch-gravity DAM CONTRACTION joints shear KEYS nonlinear spring elements 

分 类 号：TV642.4[水利工程—水利水电工程] TV312