摘要
Newmark地震动力时程分析方法能够考虑自然地震波峰值地面加速度(PGA)、持续时间、地震频率的影响,可以输入不同地震波进行模拟计算,计算了曹妃甸典型海底边坡在发生类似唐山地震的烈度情况下动力响应,得出的位移值大小可以定量的反映地震对场地边坡的影响,根据海底斜坡或坡顶建筑物的允许位移值,可以将其作为安全稳定分析的判断指标,可以为类似边坡稳定性评价、近海工程建设等提供重要的参考作用。
Using the Newmark method for seismic time history analysis,we can put into account the effects of natural seismic peak ground acceleration（PGA）,duration,and seismic frequency on seabed slopes,and different seismic waves can be input for simulation.In this paper,we calculated the dynamic response of a typical seabed slope as the Caofeidian to an earthquake similar to the Tangshan earthquake in scale.It is concluded that the value of displacement value can be used to quantitatively describe the influence of the earthquake on the slope.Therefore,the allowable displacement value of submarine slope and buildings on it can be used as a marker in security and stability analysis,which may provide important reference for slope stability evaluation and offshore construction.
出处
《海洋地质前沿》
CSCD
2017年第6期53-58,共6页
Marine Geology Frontiers
基金
国家自然科学基金(41276060)
国家专项(DD20160144)
