Research On The Isolation Technique Of Directly Storey-adding On Frame Structure

Steel structure directly add layer technology has its unique advantages, often iswidely used in home add layer reconstruction.In this paper, we try to use the isolationtechnology in the steel structure directly add layer,using the finite element analysissoftware SAP2000, comparison and analysis the time history response results ofdifferent coating systems under rare earthquake: the chang rule of natural vibrationperiod, inter-story shear force and acceleration, layer displacement and layerdisplacement Angle.The analysis results show that,when the isolation device is appliedto the steel frame structure, change the vibration characteristic of the original structure,reduce the seismic energy upwards to add layer structure, relieve the whiplash effectcaused by steel adding storey,improve the seismic performance of the overall structure.Then the paper try to use the isolation device under different layout position layerof the steel structure, the different position of the isolation device will not only affectthe damping effect of the structure,at the same time can also affect the function ofbuildings.According to the domestic lead mechanics index of the laminated rubberisolation bearings, selected seven different kinds of isolation bearing with differentquality, diameter and effective horizontal stiffness, compare the isolation effect of theisolation bearing in three kinds of seismic waves under rare earthquake action, the dataprovide certain reference for the selection of the added layer in the future.