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Ultra-High Performance Concrete (UHPC) is one of the most innovative cement-based structural engineering materials developed in the last 30 years from the perspective of mechanical properties and durability of concrete construction. As early as 1930, Andresen and Andressen established the mathematical model of the maximum packing density theory.
The allowable concrete tensile stress used in flexural design of HPC girders should be limited to 6 . The Louisiana DOTD may implement the use of 72-in. deep HPC bulb-tee girders designed in accordance with current AASHTO provisions with the knowledge that girder performance will be satisfactory. Deformed welded wire reinforcement with a
Rectangular stress block parameters used in ordinary concrete members cannot be used safely for high performance concrete members. New stress block parameters have been obtained from the experimental study. • The model proposed by Hognestad for ordinary concrete is modified for high performance concrete.
2010/03/01 · Ultra-high-performance concrete (UHPC) is a promising new class of concrete material that is likely to make a significant contribution to addressing the challenges associated with the load ...
2016/06/06 · Research and Applications of Ultra-high Performance Concrete Caijun Shi, Ph.D., P. Eng., FACI, F.RILEM College of Civil Engineering, Hunan UniversityOcean Engineer ing Bridge Engineer ing Highway Hydropower
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rectangular concrete-filled steel tubular column, frame structure, seismic performance . Abstract: The rectangular concrete- filled steel tubular column is a vertical bearing member, and it is easily damaged under the influence of the earthquake. Many reinforced concrete structures in China are in earthquake zones. When the load-bearing column ...
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UHM high and ultra high performance products are geopolymer concrete. HPC can be made with compressive strength up to 18000 psi and UHPC can be made with compressive strength up to 28000 psi. Both have the following
The joints' configuration and deformation of the composite truss bridge are of vital importance. Concrete filled tubular joint (CFTJ) has been approved as an effective way to enhance the loading capacity. Although the bonding force between concrete and rectangular tube is not distributed uniformly, this will cause the bond-slip behavior in the tube.
Use of ultra-high-strength bars for seismic performance of rectangular high-strength concrete frame columns Open PDF Magazine of Concrete Research ISSN 0024-9831 | E-ISSN 1751-763X Volume 60 Issue 4, May 2008, pp. 253-259 Prev ...
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Ultra-high performance concrete (UHPC) is a novel con-struction material exhibiting enhanced mechanical and durability properties, which can lead to economical con-struction through reducing the cross-sections of structural ...
In addition to the unique aesthetics achieved with concrete construction, these buildings offer some very real space advantages. Public and private developers should also realize that using cast-in-place reinforced concrete to frame a high-rise office building would yield more rentable space because of lower floor-to-floor heights.
2. Concrete Diagrid Structural System. The most commonly used diagrid material is concrete. The concrete diagrids are used in both type, precast and cast in-situ. As the precast concrete sections are flexible, it allows them to fit perfectly in the structure geometry. It also protects from fire damages.
1992/02/01 · Aramid‐fiber performance was compared to that of steel and collated‐fibrillated polypropylene fibers under static flexure and drop‐weight impact. Specimens consisted of conventionally cast concrete beams, layered beams using
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Concrete Masonry Units; High-Strength Concrete; Insulating Concrete Forms; Prestressed Concrete; Ready Mixed Concrete; Roller-Compacted Concrete; Tilt-Up Concrete; Working with Concrete. Air-Entrained Concrete; Placing and Finishing Concrete; Working Safely With Concrete; Cement & Concrete Basics FAQs; Meet the Experts. Wayne Adaska, P.E. Greg ...
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