دانلود Modeling of progressive collapse of a multi-storey structure using a spring-mass-damper system

Abstract

A simple mechanical model is proposed to demonstrate qualitatively the pancake progressive collapse of multi-storey structures. The impact between two collapsed storeys is simulated using a simple algorithm  that  builds  on  virtual  mass-spring-damper  system.  To  analyze  various  collapse  modes,  columns and  beams  are  considered  separately.  Parametric  studies  show  that  the  process  of  progressive  collapse involves  a  large  number  of  complex  mechanisms.  However,  the  proposed  model  provides  a  simple numerical  tool  to  assess  the  overall  behavior  of  collapse  arising  from  a  few  initiating  causes.  Unique features,  such  as  beam-to-beam  connection  failure  criterion,  and  beam-to-column  connection  failure criterion  are  incorporated  into  the  program.  Besides,  the  criterion  of  local  failure  of  structural  members can also be easily incorporated into the proposed model.