Analysis And Research On Several Problems For Progressive Collapse Resistance Of Non-seismic Reinforced Concrete Frame Structures

The progressive collapse refers to the phenomenon in which an initial localdamage of structure element caused by abnormal loads leads to collapse of an entirestructure or a disproportional large of it. Once progressive collapse happened，itwould bring about severe loss of life and property and adverse social impact，so theprogress collapse receives public concern and researchers attention increasingly.This is main contents of article:SECTION I：Using PKPM to design a fifteen-floors RC frame building.And thenconducting the anti-progressive collapse capability analysis by making use of ANSYSto establish a model of fifteen-floors RC frame.Moreover,conducting theanti-progressive collapse capability analysis of bottom three floors of fifteen-floorsRC frame.The result shows that the collapse capabilities have large differences,theanalysis model of structure progressive collapse capability could not be replaced bylocal model,it should take the overall model.SECTION II：By means of analytical method derivation the resistance formula ofgirder mechanism、complex mechanism、catenary mechanism of RC frame structurefloors which under the circumstances of anti-progressive collapse.And then taking theadvantages of Pushdown to analysis the influence of floors to the anti-progressivecollapse capability of RC frame structure,as well as verify the correctness of topformula.SECTION III：Analysis similarities and differences of ductility requirementsabout anti-progressive collapse design of non-seismic design of reinforced concreteframe structures and seismic design of structures，proposing component ductility ratiofas ductility evaluation of anti-progressive collapse and relevant calculationformulas,discussing influence factors and scope of f.