development length

development length

1. The minimum length of straight reinforcing bar or reinforcing rod which is required to anchor it in concrete.
2. The length of embedded reinforcement required to develop the design strength at a critical section.
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Due to the vast number of longitudinal bars, DeSimone detailed end anchorage plates in order to shorten the development length and help reduce congestion.
e] is normalized by the development length specified in AASHTO LRFD design code [2] for deformed bar in tension.
The vertical reinforcement intersects potential crack planes adjacent to the anchor head thus transferring the tension load from the anchor to the reinforcement as long as proper development length is provided to develop the required strength, both above and below the intersection between the assumed failure plane [5].
Conducting tests on 27 precast/pre-stressed girders, the researchers investigated topics including transfer length and development length of prestressing strand, time-dependent prestress losses, and shear strength.
They show how composite components are manufactured and how durable they are as they age, the means of using them for the strengthening of structural members, the design and behavior of beams reinforced internally with FRP, bond and development length, and serviceability in terms of deflection and crack width.
The remainder of the tendon would retain its force at the development length away from the failure point and would remain functional.
Secant pile 120 cm, development length about 2 700 m, depth up to 30 m below ground level
Chapters are arranged in a manner compatible with the design procedure of actual structures and cover properties of reinforced concrete, flexural analysis of reinforced concrete beams, flexural design of reinforced concrete beams, alternative design methods, deflection and control of cracking, development length of reinforcing bars, shear and diagonal tension, one-way slabs, axially loaded columns, members in compression and bending, slender columns, footings, retaining walls, design for torsion, continuous beams and frames, design for two-way slabs, stairs, prestressed concrete, and seismic design of reinforced concrete structures.
FHWA broke down the "job" into three separate issues and opted to tackle the development length issue separately.
strand in the AASHTO LRFD Bridge Design Specifications, research is needed to determine the transfer length, the development length, the strands spacing, and the minimum concrete release strength.
As part of its "Investigation of Development Length of Uncoated and Epoxy-Coated Prestressing Strand" project, the Federal Highway Administration recently concluded a series of experiments to determine the temperature at which epoxy softening causes slip, the effect of that slip on the stress in the strands and the transfer length, and the effect of cyclic temperature variations.

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