Study on failure modes of a new staggered story isolated structure based on IDA method

New staggered story isolated structure is a new type of system. This paper explores the failure mode with increment dynamic analysis (IDA) method. On basis finite model stories, criterion for was established. The findings indicate that staggered, has good collapse resistance. When angle limit 1/100, primary will fail before layer in event strong earthquake, and typically happens at base where components higher bearing capacity should be used. Under impact P-δ effect, upper more prone to than lower layer. may have tensile stress exceeding 1MP horizontal displacement 385 mm, which lead risk structural overturning. Therefore, strength supports selected weak position