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Optimization from anchorage bars in concrete 2

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Alvarobg

Structural
Joined
Oct 8, 2015
Messages
22
Location
ES
Hello,

Usually, the reinforced bars have been anchored in a way that until the complete anchorage length is not developed, the bars do not contribute (see following figure):

111.png


But, I am wondering if it can be taken into account some type of contribution, in a linear way or other, since the anchorage starts to its end:

2222.png


Because in this case, with the same reinforcement the ultimate load can be a bit larger:
333.png


What do you think?

Any paper or guideline where this is explained?

Thank you
 
The capacity of partially-developed bars is usually ignored, I believe, out of convenience. Our girder analysis software checks sections with partially-developed reinforcement, if the actual end location of the bar and development length are input.
 
This topic is covered in eurocode. But rarely used
 
Could you give me some further information about Eurocode ,please?
 
Section 9.2.1.3

(3) The resistance of bars within their anchorage lengths may be taken into account, assuming a linear variation of force, see Figure 9.2. As a conservative simplification this contribution may be ignored.

Thanks!
 
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