TITLE:
Progressive Collapse Resistance of a New Staggered Story Isolated System
AUTHORS:
Yutong Yang, Yuancheng Mi, Hong Li, Zhongfa Guo, Dewen Liu, Weiwei Sun, Min Lei
KEYWORDS:
The New Staggered Story Isolated System, Alternative Load Path Method, Collapse Resistance
JOURNAL NAME:
Open Journal of Applied Sciences,
Vol.14 No.3,
March
21,
2024
ABSTRACT: A new staggered
isolated system developed from the mid-story isolated system is the new
staggered story isolated system. There are not many studies on this structure
currently. In this study, an 18-story new staggered story isolated system model
is established using SAP2000. The dynamic nonlinear dynamic alternate method is
used to analyze the structure against progressive collapse. Results show that
the structure has good resistance to progressive collapse, and there is no
progressive collapse under each working condition. The progressive collapse
does not occur for the case of removing only one vertical structural member of
the new staggered of isolated system. The side column has big influence on this
isolated structures’ progressive collapse; the removal of vertical structural
member of the isolation layer has less impact on the structure than the removal
of the bottom vertical structural member. After the removing of the member, the
internal force of the structure will be redistributed,
and the axial force of the adjacent columns will change obviously,
showing a trend of “near large and far small”.