CAJ | 학술논문

考虑库水的可压缩性和库底的吸收作用，在比例边界有限元方法的框架中推导并求解了在竖向激励下重力坝所受到的动水压力，实现了在地震作用下重力坝-库水相互作用的全方向求解，在频域和时域中均实现了对坝面动水压力的求解。数值算例结果表明，方法具有极高的精度，同时还发现在一定的条件下，垂直激励下动水压力响应对坝水系统存在较为重要的影响，此外，还对库水的压缩性以及库底的吸收作用对坝面的动水压力的影响也进行了研究。
고필고수적가압축성화고저적흡수작용，재비례변계유한원방법적광가중추도병구해료재수향격려하중력패소수도적동수압력，실현료재지진작용하중력패-고수상호작용적전방향구해，재빈역화시역중균실현료대패면동수압력적구해。수치산례결과표명，방법구유겁고적정도，동시환발현재일정적조건하，수직격려하동수압력향응대패수계통존재교위중요적영향，차외，환대고수적압축성이급고저적흡수작용대패면적동수압력적영향야진행료연구。
The hydrodynamic pressures on gravity dams subjected to vertical earthquake component were calculated in a frame of Scaled Boundary Finite Element Method (SBFEM)considering the water compressibility and the absorption of reservoir bottom.The gravity dam-reservoir interaction was solved both in frequency domain and in time domain. Numerical examples show the proposed method is capable of achieving high degree of accuracy.It is concluded that the hydrodynamic pressures caused by vertical ground motion are of special importance in the analysis of gravity dams under some prescribed assumptions.The effects of water compressibility and bottom absorption on hydrodynamic behaviors were also discussed.