Author: B. S. AndreasenPublisher:
ISBN:
Category :
Languages : en
Pages : 274
Book Description
Anchorage of Deformed Reinforcing Bars
Author: B. S. AndreasenThe Anchorage of Deformed Reinforcing Bars in Ordinary and Prestressed Reinforced Concrete
Author: T. I. AstrovaAnchorage Tests with Deformed Reinforcing Bars in More Than One Layer at a Beam Support
Author: B.S. AndreasenAn Experimental Study of Hook Anchorage for Reinforcing Bars
Author: Charles W. AtwaterPublisher:
ISBN:
Category : Hooks
Languages : en
Pages : 70
Book Description
Anchorage Bond Requirements of Plain and Deformed Reinforcing Bars
Author: Nazem Hasan SalhaPublisher:
ISBN:
Category : Reinforced concrete
Languages : en
Pages : 150
Book Description
Anchorage of Large-diameter Reinforcing Bars Grouted Into Ducts
Author: Publisher:
ISBN:
Category : Anchorage (Structural engineering)
Languages : en
Pages : 160
Book Description
The use of a few large-diameter reinforcing bars for the construction of precast concrete bridge bents allows simplified construction by reducing the number of alignments to be made in the field. These bars are grouted into ducts in a precast concrete cap beam. In the proposed precast concrete substructure system, the grouted bars carry tensile forces across the joint between the column and cap beam. This joint is the yielding element in the structural system, and it is crucial to the performance of the structure that the bars yield before other failure mechanisms, including bond failure, occur. However, the cap beam is typically insufficient to anchor the bar, as the depth of the beam is substantially less than the American Association of State Highway and Transportation Officials (AASHTO) bridge code allows. For this project, 17 pullout tests were conducted to determine the bond characteristics and development length of large-diameter bars grouted into ducts. The bars tested ranged in size from #8 to #18. Pullout tests conducted with embedment lengths of at least six bar diameters yielded the reinforcing bar, while the test conducted with an embedment length of 14 bar diameters resulted in bar fracture. The tests and subsequent analysis showed that the bond of these grouted connections is significantly better than the bond of bars cast directly into concrete. The development lengths needed to fully anchor the bar are therefore within the depth available in the cap beam.
Bond and Anchorage of Lap Splices of Reinforcing Bars with Different Deformation Properties
Author: Antoine MakhloufPublisher:
ISBN:
Category : Reinforcing bars
Languages : en
Pages : 166
Book Description
Beams were designed to include two reinforcing bars in tension, spliced at the center of the span. The splice length was selected so that the bars would fail in bond, splitting the concrete cover in the splice region, before reaching the yield point. The bars were plain round Grade 60 bars with the splice length machined to simulate #6 (20 mm) deformed bars with parallel deformation pattern and different deformation geometries. No transverse reinforcement was provided in the splice region. The beam was loaded in positive bending and designed with constant moment region at the center of the beam. At each load increment, the deflection at the center of the beam was recorded and flexural cracks were marked and their widths measured. The variables were the bar rib face angle, rib spacing, and rib height. The results of this study were combined with results of previous investigations by Prof. Hamad to come up with recommendations concerning optimum rib geometries of deformed bars with superior bond-slip characteristics.
Reinforcing Bars Anchorages and Splices
Author: Publisher:
ISBN: 9781943961535
Category :
Languages : en
Pages :
Book Description
7th Edition
Reinforcing Bars: Anchorages and Splices
Author: CRSI Staff & MembersPublisher:
ISBN: 9781943961191
Category :
Languages : en
Pages :
Book Description
Features technical data on mechanical splices including load tests for Type 1 and Type 2 splices. Includes extensive tables of development and lap splice lengths for Grade 60 reinforcing bars with 3,000 to 10,000 psi concrete compressive strengths, and development and lap splice tables for epoxy-coated reinforcing bars, including development length tables. Also includes expanded information on headed bars.
Tests for Anchorages for Reinforcing Bars
Author: Chesley Johnston PoseyPublisher:
ISBN:
Category : Alcohol as fuel
Languages : en
Pages : 764
Book Description