A Plastic Design Method for RC Moment Frame Buildings against Progressive CollapseHadi Faghihmaleki 1
- Molla-Sadra College of Ramsar, Technical and Vocational University, Ramsar, Iran
this study, progressive collapse potential of generic 3-, 8- and 12-storey RC
moment frame buildings designed based on IBC-2006 code was investigated by
performing non-linear static and dynamic analyses. It was observed that the
model structures had high potential for progressive collapse when the second
floor column was suddenly removed. Then, the size of beams required to satisfy
the failure criteria for progressive collapse was obtained by using the virtual
work method; i.e., using the equilibrium
of the external work done by gravity load due to loss of a column and the
internal work done by plastic rotation of beams. According to the nonlinear
dynamic analysis results, the model structures designed only for normal load
turned out to have strong potential for progressive collapse whereas the structures
designed by plastic design concept for progressive collapse satisfied the
failure criterion recommended by the GSA code.
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