Study on the influence of landslide-induced surge pressure distribution on damage to post-earthquake arch dams
Strong earthquakes can trigger landslides on previously damaged slopes,increasing the risk of post-earthquake landslides.These landslides can generate waves that may cause additional damage to arch dams,poten-tially leading to dam failure.Current research predominantly focuses on undamaged arch dams,simplifying land-slide surge by assuming uniform wave characteristics.However,studies on landslide-induced waves reveal signifi-cant variations in wave height and phase at different locations on the dam surface.This study identifies three typical wave pressure distribution by applying an empirical wave height formula from the China Institute of Water Resources and Hydropower Research,taking a high arch dam as a case study.Based on the defined damage indexes,this study evaluates the effects of landslide surge pressure distributions on earthquake-damaged arch dams.The results show that the influence of the pressure distributions of landslide surge on earthquake-damaged arch dams is greater than that of the uniform wave distributions in front of the dam when the wave height difference and time difference exist.When analyzing the impact of uniform distributed wave pressure on earthquake-damaged arch dams,the as-sociated risk may be underestimate.This paper recommends considering the spatial and temporal characteristics of surge waves when assessing the safety of post-earthquake landslide-induced waves,which offers crucial insights for evaluating the safety of landslide surges after earthquakes.
landslide surgearch damearthquake damagesurge pressure distributiondamage index
万方数据
维普
