The Australian concrete standards (AS3600 and AS5100.5) both have a clause which allows development lengths to be be reduced if more steel than required is provided. Doing this at a potential hinge forming region can result in sudden non-ductile collapse when overloaded since bond failure instead of gradual ductile collapse from yielding of rebars. AASHTO LFRD has a similar clause but advise to use only if yield not required. I think the Australian clause should do the same to prevent indiscriminate use of this clause. I believe all concrete structures should be detailed to fail in a ductile manner to give warning of impending collapse when overloaded. Please share your views on this.
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