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Ultrahigh-Performance Concrete for Posttensioned Precast

2017-12-1  Moreover, the use of advanced concrete materials, such as ultra-high performance concrete (UHPC), can further reduce the seismic damage of precast segmental bridge columns due to superior material ...

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Ultrahigh-Performance Concrete for Posttensioned Precast

Precast concrete piers can also limit residual displacements after earthquakes when used with nonemulative connections. This paper investigates the use of ultrahigh-performance concrete (UHPC) to eliminate damage under moderate to high seismic activity for posttensioned self-centering precast piers.

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ULTRA HIGH PERFORMANCE CONCRETE (UHPC) - Precast

2022-2-1  National Precast Concrete Association • precast 4 formulation). Elimination of coarse aggregates, along with the granular gradation and fiber aspect ratio, facilitates a high fiber content and isotropic dispersion. Due to UHPC’s plastic and hardened properties, plus the elimination of rebar, precasters can achieve complex shapes

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What is Ultra-High Performance Concrete (UHPC)?

2018-8-17  Ultra High Performance Concrete (UHPC) is a new class of concrete that has been developed in recent decades for its exceptional properties of strength and durability. This high performance concrete can be utilized in structural rehabilitation and accelerated bridge construction in addition to several other applications.

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A review on seismic behavior of ultra-high performance

2020-11-3  (2017) Ultra-high-performance fibre-reinforced concrete jacket for the repair and the seismic retrofitting of Italian and Chinese RC bridges. In: 6th ECCOMAS thematic conference on computational methods in structural dynamics and earthquake engineering , Rhodes Island , 15–17 June , pp. 2149 – 2160 .

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Seismic performance of precast concrete columns with

2021-10-15  1. Introduction. Precast concrete structures, with increasing global construction, are commonly deemed to be advantageous in terms of their building quality, time savings, cost efficiency, environmental friendliness, etc. , .Generally, precast concrete structures consist of prefabricated components, e.g., precast columns, precast panels, precast beams, and

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Developing high performance concrete for precast

2019-12-1  The term high performance concrete (HPC) is used to describe concrete mixes produced with selected high-quality mix constituents, optimized mix design, and low water-to-powder (W/CM) ratio. According to the American Concrete Institute (ACI), HPC is defined as concrete meeting special combination of characteristics and uniformity requirements ...

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Practical ultra-high-strength concrete for precast

2022-4-21  Ultra-high-performance concrete mixtures for precast concrete applications Material Tadros and Morcous (2009) Weldon et al. (2010) Giesler et al. (2016) Portland cement, lb/yd3 1120 1050 1264 1296 Silica fume, lb/yd3 240 150 158 203 Class C fly ash, lb/yd3 240 300 158 122 Sand, lb/yd3 2255 1580 1900 1812 Coarse aggregate, lb/yd3 0 672.3 0 0

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UHPC: Performance on High - National Precast Concrete

2016-9-21  The solution for these performance needs is often ultra high performance concrete. According to the Portland Cement Association, UHPC is a “high-strength, highly durable, ductile material formulated by combining portland cement, silica fume, quartz flour, fine silica sand, high-range water reducer, water and steel or organic fibers.”.

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"Ultra-High Performance Concrete for Precast Seismic

2019-8-23  Ultra-high performance concrete (UHPC), characterized by high compressive and tensile strength, and superior bond properties, is a potential material that can mitigate PH damage and enhance load transfer. This research proposes a new and simple damage tolerant precast column connection for use in medium and high seismic regions.

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Seismically Resilient Hybrid Precast Concrete Piers with

2021-6-1  To mitigate seismic damage, ultra-high performance concrete (UHPC) is used in the plastic hinge zone of the column. The column model is subjected to the 1994 Northridge-Rinaldi earthquake record ...

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Ultra-high performance concrete: Perspective for the

2003-1-1  Ultra-high performance concrete (UHPC) is a concrete with specially closed structure with a compressive strength of over 150 N/mm 2. It can be produced both as fine-grained concrete with a maximum ...

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Ultra-High Performance Concrete For Construction Pros

2018-8-21  Workers are placing Ultra-high performance concrete (UHPC) on a bridge deck for the Iowa Department of Transportation. Precast panels and structurally tying the rebar together extending from the ...

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ULTRA HIGH PERFORMANCE CONCRETE (UHPC) - Precast

2022-2-1  National Precast Concrete Association • precast 4 formulation). Elimination of coarse aggregates, along with the granular gradation and fiber aspect ratio, facilitates a high fiber content and isotropic dispersion. Due to UHPC’s plastic and hardened properties, plus the elimination of rebar, precasters can achieve complex shapes

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(PDF) A review on seismic behavior of ultra-high

2021-4-1  Abstract. Ultra-high performance concrete (UHPC) is a type of cement itious composite, and demonst rates very high compressive st rength and. good ductility. The fa vorable ductility and energy ...

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Seismic performance of precast concrete columns with

2021-10-15  Three full-scale specimens, including a monolithic reference specimen and two precast column specimens, were experimentally tested to investigate the seismic performance of the proposed precast concrete columns enhanced with local prefabricated UHPC jackets. Fig. 2 shows the configurations and reinforcement details of the test specimens.

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Seismic performance of a novel interior precast concrete

2020-11-1  Ultra-high performance concrete (UHPC) is a type of new composite material with the compressive strength of at least 120 MPa , ... Seismic performance of precast columns with mechanically spliced column-footing connections. ACI Struct J, 111 (3) (2014), pp. 639-650.

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Study on shear capacity of ultra-high performance

2020-6-1  Ultra-high performance concrete (UHPC) is considered the most innovative cement-based engineering material of the past 30 years. UHPC has advantages such as high strength, high toughness, and excellent durability. ... Ultrahigh-performance concrete for posttensioned precast bridge piers for seismic resilience. J. Struct. Eng., 143 (12) (2017 ...

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(PDF) Design of Ultrahigh-Performance

2014-12-1  There have been several research efforts that have investigated UHPC joints between full-depth precast concrete deck panels (Aaleti and Sritharan 2014; Graybeal 2014b) and adjacent box beams (Yuan ...

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Ultrahigh-Performance Concrete for Posttensioned Precast

DOI: 10.1061/(ASCE)ST.1943-541X.0001906 Corpus ID: 117130288. Ultrahigh-Performance Concrete for Posttensioned Precast Bridge Piers for Seismic Resilience @article{Yang2017UltrahighPerformanceCF, title={Ultrahigh-Performance Concrete for Posttensioned Precast Bridge Piers for Seismic Resilience}, author={Cancan Yang and Pinar

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Ultra-High Performance Concrete - Cement

Ultra High Performance Concrete (UHPC) Ultra-High Performance Concrete (UHPC) is a cementitious, concrete material that has a minimum specified compressive strength of 17,000 pounds per square inch (120 MPa) with

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ULTRA HIGH PERFORMANCE CONCRETE (UHPC) - Precast

2022-2-1  National Precast Concrete Association • precast 4 formulation). Elimination of coarse aggregates, along with the granular gradation and fiber aspect ratio, facilitates a high fiber content and isotropic dispersion. Due to UHPC’s plastic and hardened properties, plus the elimination of rebar, precasters can achieve complex shapes

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Ultra-high performance concrete: From fundamental to

2018-12-1  Over the last twenty years, remarkable advances have taken place in the research and application of ultra-high performance concrete (UHPC), which exhibits excellent rheological behaviors that include workability, self-placing and self-densifying properties, improved in mechanical and durability performance with very high compressive strength, and non

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Seismic performance of precast concrete columns with

2021-10-15  Three full-scale specimens, including a monolithic reference specimen and two precast column specimens, were experimentally tested to investigate the seismic performance of the proposed precast concrete columns enhanced with local prefabricated UHPC jackets. Fig. 2 shows the configurations and reinforcement details of the test specimens.

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Seismic-Resistant Bridge Columns with Ultrahigh

2016-9-1  AbstractThe flexural capacity of a well-designed RC column deteriorates under extreme ground motion as a result of crushing of the core concrete and buckling of the longitudinal bars in the plastic hinge regions. Thus, it is important to minimize damage at the plastic hinge region to develop high-performance bridge columns. A column that uses ultrahigh

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Precast Seismic Bridge Column Connection Using Ultra-

2020-1-1  Abstract: In high seismic regions, prefabricated columns have seen limited applications because the connections generally coincide with the plastic hinge (PH) region, where major damage occurs. This paper proposes a simple and damage-tolerant precast column connection for use in medium and high seismic regions that uses ultra-high-performance ...

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Probabilistic seismic vulnerability and loss assessment of a

2020-12-15  Precast segmental ultra-high performance concrete (UHPC) columns with post-tensioned (PT) tendons can effectively protect the compression toe from damage and enhance energy dissipation (ED) capacity of column compared to conventional segmental concrete columns. ... (2017) Seismic design of precast piers with pocket connections, CFRP tendons ...

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Seismic Performance of Lightweight Concrete Structures

2018-2-6  Lightweight concrete has low density and is adaptable for construction of buildings in low-seismic zones. Structural seismic responses are based on mass of the structure or dead weight of the structure; the selection of materials to maintain the dead weight low should be adopted. Concrete is used to construct any structure; the ingredients of ...

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Seismic Performance Evaluation of Precast Concrete Beam

2020-5-14  A new type of prefabricated reinforced concrete-Y-shaped eccentrically steel brace structure (PRC-Y-ESBS) is developed by combining the mechanical property of prefabricated reinforced concrete frame and Y-shaped eccentrically steel brace, so the seismic performance and seismic resilience capacity of prefabricated reinforced concrete frame can be effectively

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