Ductility is considered an essential requirement for the seismic design of reinforced concrete structures, since it allows redistributing forces among the members of a redundant structure after reaching their strength. However, the Eurocodes and the Italian Building Code recognize the need to design structures against accidental loading as well, relying on ductility and redundancy to prevent disproportionate collapse. This paper first illustrates the need of applying ductile design to all frames subjected to any accidental load, not limited to earthquake scenarios, based on equilibrium considerations and laboratory observations. Then, it summarizes the results of an analytical study validated against experimental evidence, which demonstrate the need of increasing the length of the critical regions beyond the values currently prescribed by structural codes.
Two critical issues in detailing reinforced concrete frames for ductility
Guerrini G.
2019-01-01
Abstract
Ductility is considered an essential requirement for the seismic design of reinforced concrete structures, since it allows redistributing forces among the members of a redundant structure after reaching their strength. However, the Eurocodes and the Italian Building Code recognize the need to design structures against accidental loading as well, relying on ductility and redundancy to prevent disproportionate collapse. This paper first illustrates the need of applying ductile design to all frames subjected to any accidental load, not limited to earthquake scenarios, based on equilibrium considerations and laboratory observations. Then, it summarizes the results of an analytical study validated against experimental evidence, which demonstrate the need of increasing the length of the critical regions beyond the values currently prescribed by structural codes.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
