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Wednesday, May 13, 2020 | History

2 edition of Fatigue behavior of pretensioned concrete girders found in the catalog.

Fatigue behavior of pretensioned concrete girders

T. R. Overman

Fatigue behavior of pretensioned concrete girders

by T. R. Overman

  • 79 Want to read
  • 39 Currently reading

Published by The Center, Available through the National Technical Information Service in Austin, Tex, Springfield, Va .
Written in English

    Subjects:
  • Prestressed concrete beams -- Testing.,
  • Prestressed concrete beams -- Fatigue.

  • Edition Notes

    Statementby T.R. Overman, J.E. Breen, and K.H. Frank ; conducted for Texas State Department of Highways and Public Transportation in cooperation with the U.S. Department of Transportation, Federal Highway Administration by Center for Transportation Research, Bureau of Engineering Research, the University of Texas at Austin.
    SeriesResearch report / Center for Transportation Research, Bureau of Engineering Research, the University of Texas at Austin ;, no. 300-2F, Research report (University of Texas at Austin. Center for Transportation Research) ;, no. 300-2F.
    ContributionsBreen, J. E. 1932-, Frank, Karl H., Texas. State Dept. of Highways and Public Transportation., United States. Federal Highway Administration., University of Texas at Austin. Center for Transportation Research.
    Classifications
    LC ClassificationsTA683.5.B3 O83 1984
    The Physical Object
    Paginationxxvii, 354 p. :
    Number of Pages354
    ID Numbers
    Open LibraryOL2668149M
    LC Control Number85623228

    Shear behavior of concrete beams reinforced by FRP rods as longitudinal and shear reinforcement (English) Fatigue of reinforced concrete beams externally prestressed with Aramid fibre cables. Horiguchi, T. / Saeki. Fatigue life of partially prestressed concrete bridge girders. Author. Marianos, Ward Nicholas, Jr. Advisor. Bruce, Robert N., Jr. Date. Description. Prestressed concrete is one of the most common materials used in modern bridge construction. Nearly 50% of new highway bridges are constructed of prestressed concrete.

      In this paper, an experimental work, consists of two specimens, was introduced to study the fatigue behavior of shear connectors and steel-concrete composite beams. The fatigue tests were conducted under a four-point bending test with two different stress ranges in a constant amplitude. Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF. Below is the uncorrected machine-read text.

    COMPREHENSIVE DESIGN EXAMPLE FOR PRESTRESSED CONCRETE (PSC) GIRDER SUPERSTRUCTURE BRIDGE WITH COMMENTARY (Task order DTFHT) US CUSTOMARY UNITS Submitted to THE FEDERAL HIGHWAY ADMINISTRATION Prepared By Modjeski and Masters, Inc. November Archived. Pre-tensioned concrete is a variant of prestressed concrete where the tendons are tensioned prior to the concrete being cast.: 25 The concrete bonds to the tendons as it cures, following which the end-anchoring of the tendons is released, and the tendon tension forces are transferred to the concrete as compression by static friction.: 7 Pre-tensioning is a common prefabrication technique.


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Fatigue behavior of pretensioned concrete girders by T. R. Overman Download PDF EPUB FB2

Thirteen pretensioned partially prestressed concrete beams corroded through the impressed current method were considered. Both static and fatigue tests were conducted with corroded and uncorroded beams.

The effects of corrosion degree of prestressing wires or rebars, the partial prestressing ratio (PPR), and the load range on fatigue behavior of corroded beams were also analyzed and by: behavior associated with pretensioned beams made with debonded strands, plus the results from static testing.

The third and final paper will contain spe­ cific design recommendations for the safe and reliable use of debonded strands in prestressed concrete beams.

The fatigue test specimens are com­ panion specimens to a series of beams. Based on the fatigue test results of 3 prestressed concrete beams using the HRB steel bars as nonprestressed reinforcement, the stress of nonprestressed reinforcement and prestressed strand and.

Fatigue tests were conducted on corroded prestressed concrete beams. The 3D geometric models of corroded wires or rebars were obtained. Fatigue failure mechanism of corroded prestressed concrete beams was revealed. Longitudinal variation of the cross-sectional area had a significant influence on fatigue behavior of corroded beams.

article info. Fatigue tests were conducted on corroded prestressed concrete beams. • The 3D geometric models of corroded wires or rebars were obtained. • Fatigue failure mechanism of corroded prestressed concrete beams was revealed. • Longitudinal variation of the cross-sectional area had a significant influence on fatigue behavior of corroded by: Fatigue Endurance of High-Strength Prestressed Concrete Bulb-Tee Girders.

In this research, 6 full-sized, precast, pretensioned bulb-tee girders made with high-strength concrete were tested to evaluate their behavior under fatigue loading. Each of the 6 bridge girders had a specified design concrete compressive strength of 10, psi.

An experimental program was conducted to test five pretensioned, prestressed concrete T beams designed for Fatigue behavior of pretensioned concrete girders book prestressing strand stress ranges under live-load conditions.

The experimental testing consisted of precracking the beams, strengthening them with carbon FRP, and mechanically loading them to study the effect of increasing the live load on strand fatigue. Results indicate that the fatigue behavior of such retrofit beams is controlled by the fatigue behavior of the reinforcing steel.

The fatigue life of a reinforced concrete beam can be increased by the application of an FRP retrofit, which relieves some of the stress carried by the steel.

Based on the relationship, two equations are proposed for the prediction of fatigue strength of concrete, one for the high-cycle fatigue and one for low-cycle fatigue.

The investigation included fabrication and testing of 70 ft long, 54 in. deep pretensioned, prestressed high strength concrete bulb-tee girders. The design concrete compressive strength for the girders psi.

Two girders were used to evaluate long-term static load and fatigue performance. Results from girder used to determine long-term. Fatigue behaviors of prestressed concrete beams with different corrosion level are investigated in a series of bonded post-tensioned T-beams.

The beams have the same designs and submitted to the same maximum and minimum load during the test. Accelerated corrosion method is used to make various corrosion rates of prestressed steel strands.

However, in the past the conducted experiments on fatigue behavior of post-tensioned prestressing steel in steel ducts were limited to 2x10E7 load cycles.

In the course of various research projects at the TU Dortmund University, eleven large scale tests on prestressed concrete beams have. fatigue behavior of precast prestressed girders with unshored cast-in-place slabs. It includes a literature survey of shear fatigue behavior and design specifications related to fatigue of structural concrete.

Prestressed concrete beams of size × × mm were designed, and two bonded cold-drawn 7 mm steel wires were stressed at 70% UTS under service conditions before concreting. The beams were cast with M40 grade concrete mix with various percentages of chlorides ranging from 0, 1, 2, and 3&#x; by weight of cement and cured for 28 days.

“Static and Fatigue Behavior of Pretensioned Bridge Girders Made with High-Strength Concrete.” PCI 38(3): –Journal 2. Russell, B.W., and N.H. Burns. Design Guidelines for Transfer, Development and Debonding of Large Diameter Seven Wire Strands in Pretensioned Concrete Girders.

Research report F. Austin, TX. Three ft (m) long, in. (m) deep, precast, pretensioned bulb-tee girders were tested to evaluate behavior under flexural fatigue and static shear loadings. The three girders had a design concrete compressive strength of 10, psi ( MPa) and incorporated in.

(mm) diameter, Gradelow relaxation prestressing strands. prestressed concrete members strengthened with CFRP and tested in fatigue. The fatigue behavior of prestressed concrete was extensively examined in the ’s and ’s13, 14 with results showing that very little fatigue degradation occurs if the girder remains uncracked.

If the fatigue load is above the cracking load and the stress range in the. Predicting the Bond Behavior of Prestressed Concrete Beams Containing Debonded Strands 60 Bruce W. Russell Ph.D., P.E. Assistant Professor School of Civil Engineering and Environmental Science University of Oklahoma debond/transfer zone of pretensioned concrete girders.

All girders were pretensioned by using 7 wired strands of mm diameter at bottom and 5 mm wires at top, as shown in Figure shear linkages, 5 mm steel wire was used to provide shear reinforcement as given in detailing of girders (Figure 1).Ordinary tap water was used in preparing concrete mixes for : Muhammad U.

Rashid, Liaqat A. Qureshi, Muhammad F. Tahir. Abstract The Texas Department of Transportation designs typical highway bridge structures as simple span systems using standard precast, pretensioned girders.

Spans are limited to about ft due to weight and length restrictions on transporting the precast girder units from the prestressing plant to the bridge site. Such bridge construction, while economical from an initial cost point-of. fatigue behavior of reinforced concrete beams strengthened with FRP composite sheets and strips, for instance, which is described in this paper, provides valuable information regarding the expected long- term performance of the FRP strengthening systems.

The present study examines the effects of one-dimensional FRP composite rehabilitation systemsFile Size: KB.As on the load-deflection curve for a pre-tensioned pre-stressed concrete I-beam in which a flexural fatigue failure occurred is shown in Fig- 7, along with a cross-section through the beam showing the location of the six 7/16 in (11 mm) diameter seven-wire psi ( MPa) grade strand.Toggle navigation.

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