ANALYSIS ON WORKING MECHANISM OF INTERLAYER SEISMIC ISOLATION MASONRY BUILDING WITH FRAME STRUCTURE IN THE FIRST STOREY

Based on the characteristics that the rigidity of the upper masonry structure is much bigger than the rigidity of laminated rubber bearings and frame structure.It can be referred to as system having a two degree of freedom.The dynamic behavior of this building is analyzed,the isolated vibration mode controls the response of system.The influence regulations among the composite damping ratio,the stiffness ratio and the mass ratio are investigated.A practical method for dynamical behavior analysis to masonry building with frame structure in the first storey with laminated rubber bearings between the first and second storey is presented,which submits efficient path to found applicable design means and to generalize interlayer seismic isolation structure.