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Reducing anchorage length by providing more steel than required

Reducing anchorage length by providing more steel than required

Reducing anchorage length by providing more steel than required

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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