拱坝抗震措施设计

Design of Anti-seismic Measures for Arch DamAbstractAt present,arch dams have been widely used in the construction of high dams ofmodern water conservancy projects,because arch dams have many advantages overother types of dams,such as overloading ability,beautiful shape,good seismicperformance and light structure.Due to the complex spatial shell structure of the archdam,the stress condition of the arch dam is also very complicated.The importantindex to evaluate the safety of an arch dam is the stress and strain performance of thedam,and the arch dam under complex stress Deformation and stress variation rulesand characteristics of the high arch dam structure safety analysis and evaluation hasvery important significance and value.This design is mainly applied to the principle and calculation method of static anddynamic analysis of finite element method.The physical model of Baihetan arch damis established by FEPG.GID software.Finite element software ABAQUS is used toanalyze the finite element static and dynamic force of Baihetan arch dam.The maincontents of the work and the conclusions are as follows:(1)Dynamic analysis of arch dams is carried out.The dynamic responsecharacteristics of Baihetan arch dam under the action of seismic force are studied bycalculation and analysis.The results of dynamic time history analysis show that theconstruction of dam foundation is more safe than non-expanding foundation,effectively reducing the compressive stress of dam foundation,and arrangingreinforcement according to the distribution of stress.According to the damage map toput forward the corresponding seismic measures.(2)The design is based on the concrete high arch dam engineering example,usingthe large-scale finite element analysis software ABAQUS three-dimensional finiteelement analysis method to obtain the displacement diagram,stress diagram,structureof the vibration characteristics and dynamic response results regularity is better,Theseresults not only have practical effect on the construction and design of practicalprojects,but also have great reference value for similar projects.Key words:Baihetan arch dam;modeling;finite element dynamic analysis andcalculation;stress analysis.