Effect Analysis of Structural Dynamic Characteristics of Powerhouse Considering Different Connections of Floors

A three-dimensional finite element model is established in accordance with a large surface powerhouse in this paper.The natural vibration characteristics of powerhouse structures considering different connection manners between floors and walls are studied.Furthermore,the harmonic responses of the powerhouse structure models under dynamic loads in different calculation schemes are analyzed.According to the results,the vibration responses of superstructures and floors are stronger,and the horizontal vibration displacement of ventilation barrels and floors are greater due to the stiffness decrease in ventilation barrels and floors while the floors are lapped with walls.In conclusion,it is unfavorable to the powerhouse floors' anti-vibration.