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minimum confinement reinforcement for prestressed

Minimum confinement reinforcement for prestressed

2020-10-13 minimum confinement reinforcement for prestressed concrete piles in seismic regions. By varying key variables, such as the concrete strength, prestressing force, and axial load, the spiral reinforcement quantified according to the proposed approach provides a minimum curvature ductility capacity of about 18, while the

Minimum confinement reinforcement for prestressed

The design of prestressed concrete piles in seismic regions is required to include confinement reinforcement in potential plastic hinge regions. However, the existing requirements for quantifying this reinforcement vary significantly, often resulting in unconstructible details. This paper presents a rational approach for designing minimum ...

(PDF) Minimum Confinement Reinforcement for

This paper presents a rational approach for designing minimum confinement reinforcement for prestressed concrete piles in seismic regions. By varying key

Minimum Confinement Reinforcement for Prestressed

2018-11-1 Minimum Confinement Reinforcement for Prestressed Concrete Piles and a Rational Seismic Design Framework The following comments relate to “Minimum Confinement Reinforcement for Prestressed Concrete Piles and a Rational Seismic Design Framework,”1 by S. Sritharan, A.-M. Cox, J. Huang,

(PDF) Discussion on Minimum Confinement Reinforcement

Prestressed concrete piles used in high seismic regions are required to be designed with spiral reinforcement in the potential plastic hinge regions for confinement purposes.

Minimum confinement reinforcement for prestressed

Minimum confinement reinforcement for prestressed concrete piles and a rational seismic design framework By Sri Sritharan, Ann-Marie Cox, Jinwei Huang, Muhannad Suleiman and K. Arulmoli Get PDF (1 MB)

CONFINEMENT REINFORCEMENT REQUIREMENT FOR

2009-8-7 confinement reinforcement in prestressed concrete piles in high seismic regions. KEYWORDS: Precast, presetressed, concrete, pile, seismic, confinement, reinforcement 1. INTRODUCTION Precast, prestressed piles have been widely used in the design of foundations for bridges, buildings, and wharf structures.

Confinement Reinforcement Pile Driving Contractors ...

2018-10-30 Minimum Spiral Reinforcement Requirements and Lateral Displacement Limits for Prestressed Concrete Piles in High Seismic Regions. Final report to PCI; ISU- ERI-Ames Report ERI-10321. Ames, IA: Department of Civil, Construction, and Environmental Engineering, Iowa State University.

Comprehensive Design Example for Prestressed Concrete

2017-6-27 Design Step 5.7.2.3 - Minimum required transverse reinforcement. Limits on maximum factored shear stresses for sections without transverse reinforcement are presented in S5.8.2.4. Traditionally, transverse reinforcement satisfying the minimum transverse reinforcement requirements of S5.8.2.5 is provided along the full length of the beam.

Design of confinement reinforcement for RC columns

2021-12-9 Design of confinement reinforcement for RC columns N. Subramanian Transverse reinforcements in columns in the form of hoops, cross-ties, or spirals play an important role in safeguarding the columns, especially when they are subjected to strong earthquakes or accidental lateral loads. They are required in

Minimum Confinement Reinforcement for Prestressed

2018-11-1 Minimum Confinement Reinforcement for Prestressed Concrete Piles and a Rational Seismic Design Framework The following comments relate to “Minimum Confinement Reinforcement for Prestressed Concrete Piles and a Rational Seismic Design Framework,”1 by S. Sritharan, A.-M. Cox, J. Huang,

Minimum Spiral Reinforcement Requirements and

2020-2-6 of prestressed pile sections in seismic regions, nor do the code-based equations allow the designer to account for a desired ductility when determining the minimum confinement reinforcement in prestressed concrete piles. For this reason, a rational study presented in this

Bottom Flange Confinement Reinforcement in Precast ...

The AASHTO LRFD bridge specifications state that the minimum requirements for this confinement reinforcement is No. 10 (#3) bars at a maximum spacing of 150 mm (6 in.) for at least 1.5 times the girder’s height. Neither standard nor LRFD specifications justify the need for

2010 Structures Conference - Prestressed Concrete

2010-7-20 Confinement Reinforcement – AASHTO LRFD 5.10.10.2 “For the distance of 1.5d from the end of the beams other than box beams, reinforcement shall be placed to confine prestressing steel in the bottom flange. The reinforcement shall be” – IDM “The reinforcement should be #3 bars spaced at 6” for a minimum distance of

Impact of Bottom Flange Confinement Reinforcement on ...

2021-7-14 Specification changed the distance over which the confinement was to be distributed from 1.0h to 1.5h, and gave minimum requirements for the amount of steel to be used, No.3 bars, and their maximum spacing, not to exceed 6”. Research was undertaken to study what impact, if any, confinement reinforcement has on the performance of prestressed ...

Unified Minimum Flexural Reinforcement Requirements for ...

1997-7-1 The concept of increasing minimum reinforcement requirements for prestressed members with increases in the level of prestress is not supported by the research results reviewed in this study, or by the analytical investigations reported herein.

Structural behavior of concrete girders prestressed and ...

2021-9-16 The confinement reinforcement, rebars #10, was placed along the first 1422 mm (56 in.) from each end of the girder to resist bursting stresses when the strands were released. The dimensions and reinforcement of the deck slab are shown in Fig. 4. Download : Download high-res image (450KB) Download : Download full-size image; Fig. 4.

Precast, Prestress Bridge Girder Design Example

2020-2-4 Precast, Prestressed Girder Design Example –PGSuper Training ( 2/4/2020) 1 . 1 Introduction . The purpose of this document is to illustrate how the PGSuper computer program performs its computations.

PGSuper: Transverse Reinforcement

2018-5-18 Transverse reinforcement zones are described by their length, spacing and bar size. Primary bar zones contain vertical shear reinforcement that can optionally be extended into the deck for horizontal interface shear, and also be used for confinement steel and splitting resistance. These bars typically represent the main stirrups in a girder.

Design of confinement reinforcement for RC columns

2021-12-9 Design of confinement reinforcement for RC columns N. Subramanian Transverse reinforcements in columns in the form of hoops, cross-ties, or spirals play an important role in safeguarding the columns, especially when they are subjected to strong earthquakes or accidental lateral loads. They are required in

2010 Structures Conference - Prestressed Concrete

2010-7-20 Confinement Reinforcement – AASHTO LRFD 5.10.10.2 “For the distance of 1.5d from the end of the beams other than box beams, reinforcement shall be placed to confine prestressing steel in the bottom flange. The reinforcement shall be” – IDM “The reinforcement should be #3 bars spaced at 6” for a minimum distance of

Bottom Flange Confinement Reinforcement in Precast ...

Bottom Flange Confinement Reinforcement in Precast Prestressed Concrete Bridge Girders. The AASHTO standard bridge specifications require that nominal reinforcement should be placed to enclose prestressing steel at girder ends for at least a distance equal to the girder’s height.

Impact of Bottom Flange Confinement Reinforcement on ...

2021-7-14 Specification changed the distance over which the confinement was to be distributed from 1.0h to 1.5h, and gave minimum requirements for the amount of steel to be used, No.3 bars, and their maximum spacing, not to exceed 6”. Research was undertaken to study what impact, if any, confinement reinforcement has on the performance of prestressed ...

Authors’ Response: Minimum Confinement Reinforcement

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Unified Minimum Flexural Reinforcement Requirements for ...

1997-7-1 The concept of increasing minimum reinforcement requirements for prestressed members with increases in the level of prestress is not supported by the research results reviewed in this study, or by the analytical investigations reported herein.

Structural behavior of concrete girders prestressed and ...

2021-9-16 The confinement reinforcement, rebars #10, was placed along the first 1422 mm (56 in.) from each end of the girder to resist bursting stresses when the strands were released. The dimensions and reinforcement of the deck slab are shown in Fig. 4. Download : Download high-res image (450KB) Download : Download full-size image; Fig. 4.

Design Model for Confinement Reinforcement in

2013-1-1 The 2007 edition of AASHTO LRFD Bridge Design Specifications contains prescriptive requirements for the quantity and placement of confinement reinforcement located in the bottom bulb of pretensioned concrete I-girders. The proposed model can be used to design confinement reinforcement as an alternative to AASHTO's prescriptive requirements.

Shear Reinforcement Requirements for High-Strength ...

2020-10-13 The test results of prestressed specimens with concrete compressive strength in the range of 13 500 to 16 500 psi indicated that the minimum amount of shear reinforcement prescribed in the 2004 AASHTO LRFD Specifications,

Design of confinement reinforcement for RC columns

2021-12-9 Design of confinement reinforcement for RC columns N. Subramanian Transverse reinforcements in columns in the form of hoops, cross-ties, or spirals play an important role in safeguarding the columns, especially when they are subjected to strong earthquakes or accidental lateral loads. They are required in

Detailing of Reinforcement in Concrete Structures

2017-5-19 ΣAtr = cross-sectional area of the transverse reinforcement along the development length Lsy.t ΣAtr.min = cross-sectional area of the minimum transverse reinforcement, which may be taken as 0.25As for beams and 0 for slabs As = cross-sectional area of a single bar of diameter db being anchored