Nonlinear earthquake analysis of high arch dam-water-foundation rock systems

作者：Wang, Jin-Ting^*; Zhang, Chu-Han; Jin, Feng

来源：EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS, 2012, 41(7): 1157-1176.

DOI：10.1002/eqe.1178

• arch dam-water-foundation rock systems
• contraction joints
• input mechanism
• nonlinear earthquake response

A nonlinear finite element model for earthquake response analysis of arch damwaterfoundation rock systems is proposed in this paper. The model includes dynamic damwater and damfoundation rock interactions, the opening of contraction joints, the radiation damping of semi-unbounded foundation rock, the compressibility of impounded water, and the upstream energy propagating along the semi-unbounded reservoir. Meanwhile, a new equivalent force scheme is suggested to achieve free-field input in the model. The effects of the earthquake input mechanism, joint opening, water compressibility, and radiation damping on the earthquake response of the Ertan arch dam (240?m high) in China are investigated using the proposed model. The results show that these factors significantly affect the earthquake response of the Ertan arch dam. Such factors should therefore be considered in the earthquake response analysis and earthquake safety evaluation of high arch dams.

• 出版日期2012-6
• 单位清华大学