Shear Strength and Behavior of High-Strength Concrete Prestressed Beams

Villamizar, Sandra; Ramírez, Julio A.; Aguilar, Gerardo

doi:10.14359/51689458

Cited by 4 publications

(3 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Structural solutions based on prefabricated girders made from very-high performance concretes (VHPCs), with and without the use fibers, have also been explored as alternatives to the steel girders due to recent research and advances in concrete constituents. [1][2][3][4][5][6] Initially mostly available as proprietary mixes, the widespread production and supply to the industry of (i) Portland cement CEM I 52.5, and (ii) third-generation super-plasticizers, together with the appearance of (iii) additions with high pozzolanic properties and steel fibers, allowed for more generalized production of nonproprietary concretes mixes with high strengths, both in compression and in tension, and with high durability.…”

Section: Introductionmentioning

confidence: 99%

Long‐term behavior of slender long‐span precast prestressed high‐strength concrete girders

Fernandes,

Cavaco,

do Carmo

et al. 2024

Structural Concrete

View full text Add to dashboard Cite

The long‐term behavior of slender (1/40) long‐span precast high‐strength concrete girders was experimentally investigated regarding their use as a competitive solution in relation to steel alternatives for highway overpasses. The time‐dependent effects of full‐scale girders has rarely been addressed, particularly the influence of creep and shrinkage of concrete with compressive strengths around 120 MPa. Two half‐scale girder specimens were produced using an economically optimized and high‐strength concrete mixture, nonfiber reinforced, designed only with conventional raw materials, currently available at Portuguese precast companies, and subjected to long‐term loading, with a magnitude of approximately 50% of the failure load in bending, during a period of 3.75 years. Using the same mixture, prismatic specimens were also produced and subjected to long‐term loading at 24 h and 7 days of age to assess both creep and shrinkage. Results show that the age of concrete at the loading day is of paramount importance regarding the time‐dependent effects. These are most relevant during the first days of loading and tend to stabilize from the 112th day of loading onward. The time‐dependent girder's mid‐span deflection at the end of the 3.75 years did not exceed more than 50% of the initial deformation. Comparison of results with those obtained with Model Code 2010 and the current version of Eurocode 2 shows that these underestimate strains and deflections due to creep, mostly because the short‐term development of these effects, occurring during the first days of loading, are not adequately represented. On the contrary, a sound agreement between experimental and theoretical values, both in short and long term, was obtained using the Auperin et al. approach.

show abstract

Section: Introductionmentioning

confidence: 99%

Long‐term behavior of slender long‐span precast prestressed high‐strength concrete girders

Fernandes,

Cavaco,

do Carmo

et al. 2024

Structural Concrete

View full text Add to dashboard Cite

show abstract

“…In the last decades, significant research has been devoted to the study of high‐performance concrete (HPC) and, more recently, to ultra‐high‐performance concretes (UHPC), either fiber‐reinforced (UHPFRC), or not 1–6 . The most significant research on the use of UHPC for practical applications on infrastructures, namely for bridge girders, has been conducted by the Federal Highway Administration (FHWA) of the U.S. Department of Transportation.…”

Section: Introductionmentioning

confidence: 99%

“…In the last decades, significant research has been devoted to the study of high-performance concrete (HPC) and, more recently, to ultra-high-performance concretes (UHPC), either fiber-reinforced (UHPFRC), or not. [1][2][3][4][5][6] The most significant research on the use of UHPC for practical applications on infrastructures, namely for bridge girders, has been conducted by the Federal Highway Administration (FHWA) of the U.S. Department of Transportation. In fact, the first studies considering the use of precast prestressed long-span girders using HPC on bridges were carried out by the Louisiana and Texas states transportation departments [7][8][9][10][11] in the 1990s and 2000s.…”

Section: Introductionmentioning

confidence: 99%

Flexural behavior of slender long‐span precast prestressed high‐strength concrete girders

Fernandes

Cavaco

Maranha

et al. 2021

Structural Concrete

View full text Add to dashboard Cite

The flexural behavior of slender (1/40) long‐span precast high‐strength concrete girders was experimentally investigated as a competing solution to steel alternatives for highway overpasses. Half‐scale specimens were produced using an economical and high‐strength (120 MPa) concrete mixture, non‐fiber reinforced, designed only with conventional raw materials, currently available at Portuguese precast companies. Two girder specimens were subjected to quasi‐static short‐term loading up to structural failure in bending. Results have shown the typical behavior of conventional reinforced concrete members in bending, despite the brittle behavior of non‐fiber‐reinforced high strength concretes. Results also showed acceptable ductility (2.6) and the ability of the girder specimens to experience large deformation without significant softening. An analytical approach, based on plane sections and short‐term stress–strain constitutive model recommended by the Eurocode 2 for concrete up to the C90/105 strength class, showed to predict accurately the behavior of girders in bending, both to ultimate and serviceability limit states, including cracking, yielding, maximum loads, and ultimate deflections.

show abstract

Improvements of IS 1343-2012 Shear Design Provisions Using a New Traditional Shear Database of Prestressed Concrete Members with Stirrups

Perumalla

Laskar

2020

Sādhanā

View full text Add to dashboard Cite

Shear Strength and Behavior of High-Strength Concrete Prestressed Beams

Cited by 4 publications

References 18 publications

Long‐term behavior of slender long‐span precast prestressed high‐strength concrete girders

Long‐term behavior of slender long‐span precast prestressed high‐strength concrete girders

Flexural behavior of slender long‐span precast prestressed high‐strength concrete girders

Improvements of IS 1343-2012 Shear Design Provisions Using a New Traditional Shear Database of Prestressed Concrete Members with Stirrups

Contact Info

Product

Resources

About