Research On Seismic Response Of Floating Equipment And Design Of Isolation Device

Earthquake disasters occur all over the world in recent years.Both the direct and indirect economic losses caused by the earthquake damage of floating equipments are very serious after the earthquake,if the structure is available.The partial or total interruption of its function will hinder the rescue and relief work after the earthquakes.Therefore,more and more attention has been paid to how to protect the floating equipments in the earthquake.Floating equipment refers to the equipment that is not fixed to the contact surface and placed directly on the contact surface when working.When an earthquake occurs,the floating equipment is damaged because it is not fixed to the contact surface.Earthquake causes the floating equipment to slip,sway,dump,drop and damage,resulting in casualties,economic losses,functional disruptions and secondary disasters.Therefore,it is necessary to study the seismic response and design the isolation device.The main work of this paper is as follows:1.The effects of amplitude,friction coefficient and vertical seismic influence coefficient k on the slip of floating equipment are investigated by using the finite element analysis with software ANSYS.The effects of the ratio of width to height B/H,the centre-of-gravity position and the friction coefficient on the rocking and dumping of the floating equipment are investigated.The seismic response characteristics of the equipment are studied.2.The finite element analysis software of ANSYS is employed to establish a 10-story cast-in-place concrete frame structure,cast-in-situ concrete frame shear wall structure and consider the transformation layer cast-in-situ concrete frame structure building.The effects of floatation floor,floatation position,floor thickness and shear wall thickness of equipments on sliding,rocking and dumping of floating equipments during earthquake are studied.3.In view of the serious earthquake damage of floating discharge equipment,a three-dimensional isolation device for floating equipment is developed,which is suitable for equipment with high requirements of high stability and poor seismic performance when it is in normal use.The transition system of the isolation device with automatic switchover between the normal state and the seismic state after the induced earthquake is set up.