Damage Analysis and Seismic Reinforcement Measures of Concrete in Discharge Structures Under Strong Earthquakes
Under seismic conditions,concrete structures undergo varying degrees of damage and cracking,directly impacting the operational safety of hydroelectric stations in earthquake-prone regions.In engineering practice,reinforce-ment with steel bars is a common seismic mitigation measure,yet specific strategies are not sufficiently clear.This paper focuses on the spillway structure of a hydroelectric plant in the southwestern region.It employs a concrete plastic damage model for dynamic time-history finite element analysis to examine the development characteristics of tensile damage in the spillway dam under strong seismic loads.Building upon this analysis,various local steel reinforcement schemes are con-sidered.A segregated model is applied to simulate the dynamic characteristics and responses of the structure,investiga-ting the seismic resistance effects of different local reinforcement measures.The results indicate that identifying regions with severe tensile damage through dynamic damage analysis is a reasonable approach for determining reinforcement are-as.Local steel reinforcement effectively improves the seismic performance of the dam,and further optimization of seismic effects is achievable by adjusting the quantity and spacing of the steel bars.The study provides valuable reference for the seismic reinforcement design of spillway structures in engineering projects.
万方数据
维普
