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JOINT REINFORCEMENT FOR CONCRETE MASONRY NCMA

Seismic Requirements In Seismic Design Category C and higher for concrete masonry other than veneer horizontal joint reinforcement spaced not more than 16 in 406 mm on center vertically with at least two wires of W1 7 MW11 is required Horizontal reinforcement also must be provided at the bottom and top of all wall openings and must extend at least 24 in 610

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Seismic Performance of Reinforced Concrete Tall Buildings with

15 11 2019 nbsp 0183 32 In the second part of this study an analytical study was performed utilizing shape memory alloy SMA bars as an alternative reinforcement for conventional steel bars in order to potentially improve the seismic performance of reinforced concrete tall buildings and reduce the residual strain upon subjecting the structure to severe earthquake shaking The study building

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PDF A706 Grade 80 Reinforcement for Seismic

2 2 illustrates the obvious increase in producti on of A706 Grade 80 and Dual A615 A706 Grade 80 reinforcing steel between 2011 and 2013 The nor malized distributions provided in Figures

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A706 Grade 80 Reinforcement for Seismic Applications

A706 Grade 80 Reinforcement for Seismic Applications In the seismic design of reinforced concrete structures the overstrength of the steel reinforcement plays a critical role in the structure s ability to dissipate energy inelastically as unaccounted for strength could lead to sudden non ductile modes of failure Thus knowledge of the expected mechanical properties

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DEPARTMENT OF TRANSPORTATION TECHNICAL

02 11 2015 nbsp 0183 32 A706 Grade 80 Reinforcement for Seismic Applications 5 REPORT DATE August 2015 David Overby Mervyn Kowalsky Rudi Seracino North Carolina State University Department of Civil Construction and Environmental Engineering Mann Hall 208 Stinson Drive Raleigh NC 27695 65A0525 California Department of Transportation Division of

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HIGH STRENGTH REINFORCING STEEL BARS LOW CYCLE FATIGUE Oregon

High strength steel HSS reinforcing steel specifically ASTM A706 Grade 80 550 is now permitted by the AASHTO LRFD Bridge Design Specifications for use in reinforced concrete bridge components in non seismic regions Using Grade 80 550 reinforcing steel bars instead of Grade 60 420 reinforcing steel bars reduces material and construction costs However

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High Strength Reinforcing Steel Bars Low Cycle Fatigue Behavior

Low cycle fatigue life of high strength reinforcing steel bars ASTM A706 Grade 80 using photogrammetry by RGB methodology is evaluated Fatigue tests are performed on specimens under constant axial displacement with total strain amplitudes ranging from 0 01 to 0 05 The experimental observations indicate that buckling of high strength reinforcing bars results in a

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NC STATE Environmental Engineering NC STATE

A706 GRADE 80 REINFORCEMENT FOR SEISMIC APPLICATIONS Final Report November 2 2015 The research described in this report is supported by the California Department of Transportation under agreement

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Reapproved 2006 REINFORCEMENT FOR CONCRETE MATERIALS AND APPLICATIONS

grade pavement basement walls small foundations and curb and gutter 2 2 Reinforced concrete Plain concrete Fig 2 2 has compressive strength the ability to resist crushing loads however its tensile strength is only about 10 of its compressive strength Its tensile strength is so low that it is nearly disregarded in design of most concrete structures Reinforced concrete

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Changes in ACI 318 Code Provisions for S K Ghosh Associates

satisfied in typical applications is updated 18 2 6 Reinforcement in special moment frames and special structural walls R18 2 6 1 Very important and extensive commentary is added to point out that reinforcing bars meeting ASTM A706 Grades 80 and 100 are permitted to resist bending moments shear forces and axial forces in special structural walls and wall components such

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Research Final Reports Caltrans California Department of

Task 2563 A706 Grade 80 Reinforcement for Seismic Applications PDF August 2015 6 9 Task 2265 Seismic Performance of Precast Girder to Cap Connections for Accelerated Bridge Construction of Integral Bridges PDF July 2015 14 7 Task 2419 Parametric Study of Ordinary Standard Bridges using OpenSees and CSiBridge PDF July 2015 11 0

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TYPE 2 MECHANICAL CONNECTIONS HEADED REINFORCEMENT

TYPE 2 FULL MECHANICAL SPLICE – ACI 318–19 Section 18 and 2018 International Building Code Exceeds specifid tensile strength fu of ASTM A615 Grades 60 75 amp 80 and A706 Grades 60 amp 80 uncoated deformed bars IAPMO UES EVALUATION REPORT ER–0796 APPLICATIONS – The TPA Tapered Position Assembly can be used where bars are bent

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Seismic Performance of Circular Concrete Columns Reinforced with

The A706 standard now includes reinforcing steel with a nominal yield strength of 550 MPa 80 ksi but its use in seismic applications is limited given the lack of experimental data on its behavior in members forming plastic hinges In this paper the results of four circular Grade 80 550 reinforced columns tested under reverse cyclic loading are discussed and compared

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Seismic Performance of Circular Concrete Columns Reinforced with

The A706 standard now includes reinforcing steel with a nominal yield strength of 550 MPa 80 ksi but its use in seismic applications is limited given the lack of experimental data on its

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Stress strain response of A706 grade 80 reinforcing steel

01 08 2017 nbsp 0183 32 Despite the limited test data on A706 grade 80 reinforcing steel in the current literature there is significant potential in its use as an alternative to A706 grade 60 steel For example congestion into members adjacent to column plastic hinges such as footings and cap beams would be reduced given the smaller amount of steel employed when compared to

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315 99 Details and Detailing of Concrete Reinforcement

2 10 Special details for seismic design of frames joints walls diaphragms and two way slabs 2 11 Corrosion resistant coatings for reinforcing steel Details and Detailing of Concrete Reinforcement ACI 315 99 Reported by ACI Committee 315 ACI 315 99 Ronald D Flach Chairman Anthony L Felder Secretary Michael Baynard Paul Gordon A Murray Lount Miguel

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High Strength Reinforcing Bars Technical Note CRSI

for use in non seismic applications and then in the 2008 edition of ACI 318 for use in seismic applications The 2009 editions of ASTM A615 and ASTM A706 were the first to include requirements for Grade 80 reinforcing bars which were adopted into the 2011 edition of ACI 318 Tables 20 2 2 4a and 20 2 2 4b of the 2014 edition of ACI 318 ACI 2014 contain the

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ASTM A706 Grade 80 Reinforcement

Reinforcement conforming to ASTM A706 Grade 80 may be used in Seismic Design Category SDC A for all components For SDCs B C and D ASTM A706 Grade 80 reinforcing steel shall not be used for elements and connections that

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Seismic performance of concrete columns reinforced with high

Columns performed in a similar manner indicating that current limits on the yield strength of reinforcing bars in seismic applications could be raised to include Grade 80 A706 bars Conclusions are drawn with respect to the effects of higher strength reinforcement on member cracking drift capacity plasticity spread plastic hinge performance and strain demands on

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ACI PCA 318 11 Building Code American Concrete Institute

Enhanced reinforcement detailing for seismic applications Grade 80 deformed bars ASTM A615 and A706 for non seismic applications Zinc and epoxy dual coated reinforcing bars ASTM A1055 Test records up to 24 months old to determine standard deviation for mixture proportioning Testing agency performing acceptance testing concrete to comply with ASTM

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ENGINEERING Guide to the Use of Grade 80 Reinforcing ETN D 7

Applications Where Grade 80 Reinforcing Bars are Permitted Types of deformed reinforcing bars permitted for particular structural applications are given in ACI Table 20 2 2 4 a Grade 80 reinforcement is now permitted to resist the following Flexure axial forces and shear forces due to grav ity and earthquake loads in special moment frames which are required in

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CONCRETE BRIDGE TECHNOLOGY Use of Grade 80 Reinforcement in Oregon

for use of ASTM A706 Grade 80 steel reinforcement to their Bridge Design and Drafting Manual BDDM These guidelines were developed from discussions with an Oregon reinforcing bar manufacturer who confirmed both availability and the approximate cost premium for Grade 80 reinforcement ODOT is ready to move forward with expanded use of Grade 80

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Monthly Supervisors Meeting Wa

Reinforcement conforming to ASTM A706 Grade 80 may be used in Seismic Design Category SDC A for all components For SDCs B C and D ASTM A706 Grade 80 reinforcing steel shall not be used for elements and connections that are proportioned and detailed to ensure the development of significant inelastic deformations for which moment curvature analysis is

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Defining Structurally Acceptable Properties of High ACI

27 08 2015 nbsp 0183 32 acceptability of newly developed high strength reinforcing bars in seismic applications The steels tested are classified as grade 60 A706 grade 80 A706 grade 80 A615 and grade 100 The high strength reinforcing bars tested represent the two most common manufacturing processes used today microalloying and quenching and tempering The results

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AN ABSTRACT OF THE THESIS OF

This research investigated the performance of HSS ASTM A706 Grade 80 reinforcement embedded in half scale RC bridge columns Column design followed standard design methodologies used by federal and state highway agencies Six columns were subjected to lateral cyclic loadings three columns were constructed with Grade 60 reinforcement and three

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www sefindia org View topic HIGH STRENGTH REINFORCEMENT

20 06 2005 nbsp 0183 32 Posted Sat Nov 21 2020 4 40 pm Post subject HIGH STRENGTH REINFORCEMENT FOR GRAVITY AND SEISMIC APPLICATION Dear SEFI Members IS 13920 2016 allows use of use of Fe 415 or lower grade reinforcing bars confirming to IS 1786 and satisfying requirements of clause 5 3 2 and 5 3 3 in Special moment resisting frames

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A706 STUD WELDABLE REBAR SWR Stud Welding Products Inc

ASTM A706 Standard Specification for Deformed and Plain Low Alloy Steel Bars for Concrete Reinforcement Grade 60 deformed concrete reinforcement ACI 318 Earthquake Resistant Structures Seismic Design Requirements for Ducle Steel Reinforcing Elements Stud weldable in accordance with the requirements AWS D1 1 D1 1 M Structural Welding Code Steel

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Stress strain response of A706 grade 80 reinforcing steel

Before ASTM A706 grade 80 rebar may be specified in the seismic design of structures its mechanical properties must be well understood and calibrated on a statistical basis Based on the results of 788 tensile tests of A706 grade 80 rebar encompassing bar sizes No 4–No 18 approx metric No 13–No 57 five major stress strain parameters are statistically evaluated

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1 Comparison of ASTM A615 and A706 Specifications

Download Table 1 Comparison of ASTM A615 and A706 Specifications from publication A706 Grade 80 Reinforcement for Seismic Applications In the seismic design of reinforced concrete structures

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Headed Bar and Mechanical Anchor Design Aid ERICO

The design is then modified to use ASTM A706 Grade 80 rebar rather than ASTM A615 Grade 60 As the use of Grade 80 rebar does not comply to condition b of Section 25 4 4 1 of ACI 318 14 12 6 1 of ACI 318 11 Chapter 17 of ACI 318 14 Appendix D of ACI 318 11 may be used to perform the necessary design calculations on the headed