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Credit goes to Rawdon Wyatt.
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Full description
Credit goes to Rawdon Wyatt.
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The present paper is an attempt to understand the significance of skill advancement for MSMEs. The purpose of the paper to visualize and conceptualize the learning profile of lab our strength, segment wise presentation of skill advancement and list o
Development length
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CHECK FOR DEVELOPMENT LENGTH
Development Length = (ø x σs ) / 4 Ƭbd
(Clause 26.2.1, IS-456 2002)
Ø=
Dia of bar
σs =
Stress in steel =
Ƭbd =
Bond Stress in Concrete
460 N/mm
2
3.3 N/mm
2
Design Bond stress may be increased by 60% for deformed bars Therefore, al allowable b bo ond st stress fo for co concrete
2
=3.3 x 1.6
Development Length = (Ø x fy) / 4 x τbd =
5.28 N/mm
(Development length in Tension)
22 Ø
Anchorage value for 90 degree bend = 2 x 4 Ø =
8 Ø (Development length in Tension with 90 degree bend)
(4 Ø for each 45 degree bend subject to max of 16 Ø) For bars having 90 degree bend, development length in Tension Tension =
14 Ø
For Bars in Compression design bond stress may be increased by 25% Therefore, allowable bond stress for concrete Development Length in Compression
=3.3 x 1.6 x 1.25 = = (Ø x460) / 4x6.6=
6.6 N/mm
2
18 Ø
For anchorage in Compression, only the length of bar in bend is to be considered and no anchorage effect is to be considered.
