jgg     2013 33 (增2):  41-44    ISSN: 0412-1961  CN: 21-1139/TG SEISMIC ANALYSIS FOR BASE ISOLATION OF  FRAME STRUCTURE 1）Key Laboratory of Earthquake Geodesy, Institute of Seismology, CEA, Wuhan 430071 2）Kaifeng University, Kaifeng 475004 Received: 2012-10-23  Revised: null  Online: 2013-10-24 Supporting info