基础隔震建筑中应用变刚度保护装置地震反应分析_杨林.pdf

DOI :10.13204/j.gyjz2006.09.007 ＊ 杨　林　周锡元 ( 　　100022) 苏幼坡　常永平 ( 　　063009) 　　　:。 , , , , 。 、、, 。 , , 。 　　:　　 SEISMIC RESPONSE ANALYSIS OF ISOLATED PROTECTION DEVICE WITH VARIABLE-STIFFNESS FOR BASE-ISOLATED BUILDINGS Yang Lin　Zhou Xiyuan (Beijing Key Lab of Earthquake Engineering and Stru tural Retrofit, Beijing University of Te hnology　Beijing　100022) Su Youpo　Chang Yongping (Earthquake Engineering Resear h Center of Hebei Provin e, Hebei Polyte hni University　Tangshan 　063009) Abstract :If the displa ement of rubber bearing of base-isolated buildings, whi h is usually aused by some what resonan e effe t from long period ground motion, the additional stiffness omponents will work together with rubber bearings and then the possibility of further in rease of the displa ement of rubber bearing is suppressed and rea hes the pres ribed limitation be ause the natural period of the base isolation building has been hanged.However the extra stiffness would let the story shear for es of the super-stru ture slightly in rease.A multi-parti le stru tural analyti model is set up.The motion equations of three states of non-affixation, right affixation and left affixation are dedu ed, and the omputer program is developed.On the basis of exemplary analysis for typi al base-isolated building, the effe tiveness of the devi e in limitation of developing large lateral displa ement of rubber bearing is demonstrated and the way of hoosing appropriate parameters for the prote tive devi e is dis ussed. Keyw rds :base isolation　laminated rubber bearings　variable stiffness isolated prote tion 　　 。