拱坝横缝影响及有效抗震措施的研究

大量研究结果和某些拱坝的地震震害表明，横缝对拱坝的地震响应有很大的影响。通过采用非光滑方程组方法以及考虑碰撞时刻动量、动能守恒来模拟横缝所引起的动接触问题，同时为了提高计算效率，采用隐-显式积分方法对坝-基系统的动力平衡方程进行求解。针对在拱坝中上部配筋这一抗震措施，也作了探讨。通过对小湾拱坝的分析，为高拱坝工程抗震措施的选择提供技术依据。

Studies of the effect of contraction joints and the effective earthquake-resistant measures for arch dams

Several researches and the seismic response of some arch dams indicate that the contraction joints have great influence on the seismic response of arch dams. In this paper, the dynamic contact problem resulted from the contraction joints is simulated by the non-smooth equation method combined with the consideration of the balance of momentum and kinetic energy at the impact time. Implicit-explicit integration scheme is used for the equilibrium equation of the arch dam-foundation system. The effect of seismic belt in arch dam is also studied. The seismic analysis of Xiaowan arch dam provids technique basis for the choice of earthquake-resistant measures to high arch dam.