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[PDF] Strengthening of Prestressed Concrete Hollow-Core

Five full-scale prestressed concrete hollow-core slabs were tested: one with no opening, two with openings in different locations, and two with identical openings strengthened with near-surface-mounted carbon-fiber-reinforced polymer (CFRP) strips. The slabs were tested in four-point bending. The openings were View via Publisher pci

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Strengthening of prestressed concrete hollow-core slab

Five full-scale prestressed concrete hollow-core slabs were tested: one with no opening, two with openings in different locations, and two with identical openings strengthened with near-surface-mounted carbon-fiber-reinforced polymer (CFRP) strips. The slabs were tested in

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Shear strengthening of prestressed concrete hollow-core

2019-9-10  CFRP sheets and epoxy were used to strengthen the pre- stressed concrete hollow-core slab specimens. The CFRP sheets were unidirectional, eece-stabilized, stitched heavy carbon-ber fabric for the wet application process of struc- tural strengthening.

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(PDF) Strengthening precast-prestressed hollow core slabs

2006-8-1  (PDF) Strengthening precast-prestressed hollow core slabs to resist negative moments using carbon fibre reinforced polymer strips: An experimental investigation and

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Strengthened Prestressed Precast Hollow Core Slabs

2019-12-17  Prestressed Hollow Core slabs Strengthening of PHC slabs may be required due to increased dead or live loads, material degradation, architectural modifications, unexpected installation of heavy machinery, reinforcement corrosion, and due to the above changes must be carefully addressed to ensure safety and integrity.

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Strengthening of reinforced concrete hollow core slabs

2021-7-18  Strengthening of Prestressed Concrete Hollow-Core Slab Openings Using Near-Surface-Mounted Carbonfiber- Reinforced Polymer Reinforcement Article Jul 2017 PCI J Karam Mahmoud Steven Foubert Ehab F....

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Strengths of Thick Prestressed Precast Hollow-Core Slab

2020-3-1  However, the current ACI 318 building code stipulates that the web-shear capacity of hollowcore members over 315 mm (12.5 in.) thickness without minimum shear reinforcement should be reduced by half, which increases the demands of shear strengthening for a thick PHCS member at its end regions.

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FLEXURAL STRENGTHENING OF PRESTRESSED HOLLOW

2022-6-16  the NSM technique in conjunction with common design concepts such as prestressed concrete, precast hollow core slabs, the complex behaviour of disturbed regions, and fiber-reinforced composite materials. An experimental program was developed, which included eleven full-scale slab specimens, subject to a four-point load configuration.

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Structural performance of precast–prestressed hollow core

2018-7-13  PPGS2 slab was strengthened with five strips of two GFRP layers. Each strip is with 100 mm width. PPGS3 is similar to PPGS2 except that the number of the layer of the used glass fiber is increased to be four layers. One layer of carbon fiber sheet (CFRP) was used in strengthening PPCS4 specimen as strips.

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(PDF) Strengthening of Prestressed Concrete Hollow-Core

The effect of openings on the behavior of prestressed concrete hollow-core slabs and the efficiency of near-surface-mounted reinforcement as a strengthening technique are investigated. Five full-scale prestressed concrete hollow-core slabs were

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Strengthening of Prestressed Concrete Hollow-Core Slab

2017-7-1  Strengthening of Prestressed Concrete Hollow-Core Slab Openings Using Near-Surface-Mounted Carbonfiber- Reinforced Polymer Reinforcement July 2017 Pci

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Strengthened Prestressed Precast Hollow Core

2019-12-17  Prestressed Hollow Core slabs Strengthening of PHC slabs may be required due to increased dead or live loads, material degradation, architectural modifications, unexpected installation of heavy machinery, reinforcement

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Strengths of Thick Prestressed Precast Hollow-Core Slab

2020-3-1  However, the current ACI 318 building code stipulates that the web-shear capacity of hollowcore members over 315 mm (12.5 in.) thickness without minimum shear reinforcement should be reduced by half, which increases the demands of shear strengthening for a thick PHCS member at its end regions.

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Behavior of Prestressed Hollow-Core Slabs Strengthened

This paper investigates the behavior of prestressed hollow-core slabs strengthened in flexure with NSM carbon FRP strip reinforcement. Seven full-scale simply supported slab specimens were tested to failure under two-point monotonic load configuration.

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Flexural Behavior of Hollow-Core Slabs Strengthened with

Five hollow-core slabs, including one control slab and four strengthened slabs, were tested to failure to investigate the flexural behavior of slabs strengthened with prestressed BFRP grids. The effect of the anchorage system and prestressing force on the flexural performance of

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FLEXURAL STRENGTHENING OF PRESTRESSED HOLLOW

2022-6-16  the NSM technique in conjunction with common design concepts such as prestressed concrete, precast hollow core slabs, the complex behaviour of disturbed regions, and fiber-reinforced composite materials. An experimental program was developed, which included eleven full-scale slab specimens, subject to a four-point load configuration.

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Prestressed Hollowcore Slabs - IPHA

Why Hollowcore. Precast flooring, and prestressed hollowcore in particular, offers many advantages over alternative methods such as in-situ concrete, steel and timber. A lightweight solution which allows long spans between supports,

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Strengthening an Existing Hollowcore Plank

2016-11-30  I'd like to round up as many options as I can for strengthening. Here's what I've got so far, acknowledging that many of these options may not actually be viable for such a heavy increase in carrying capacity. 1) FRP on

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PCI MANUAL FOR THE DESIGN OF HOLLOW CORE SLABS

2018-3-3  Structurally,ahollowcoreslabprovidestheef- ficiency of a prestressed member for load capac- ity, span range, and deflection control. In addi- tion, a basic diaphragm is provided for resisting lateral loads by the grouted slab assembly pro- videdproperconnectionsanddetailsexist.

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Shear strengthening of prestressed concrete hollow-core ...

Shear strengthening of prestressed concrete hollow-core slabs using externally bonded carbon-fiber-reinforced polymer sheets Meng, XZ; Cheng, SH; El Ragaby, A Meng, XZ (reprint author), Univ Windsor, Dept Civil Environm Engn, Windsor, ON, Canada.

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Flexural strengthening of prestressed hollow-core slabs

The main parameters included the prestressing reinforcement ratio, CFRP strengthening ratio, and in-service opening location. Experimental results showed that prestressed concrete strengthened in flexure with NSM-CFRP is a viable technique for lower reinforcement ratios. URI hdl.handle/1993/23570 Collections

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Behaviour of Precast prestressed Hollow core slabs with

2021-7-22  Hollowcore slabs are prestressed precast slab elements which have longitudinal cores running along the longitudinal (length) span. Provision of cores results in reduction of dead weight and leads to efficient cross section as it increases the effect of prestressing due to reduced cross sectional area.

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Prestressed Hollowcore Slabs MCT Group

Hollowcore slabs are prestressed and precast concrete elements, manufactured using long line steel casting beds. They are typically 1200mm wide (but can range from 600mm – 2400mm), and between 150mm – 500mm deep.Spans can be

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Strengthening an Existing Hollowcore Plank

2016-11-30  I'd like to round up as many options as I can for strengthening. Here's what I've got so far, acknowledging that many of these options may not actually be viable for such a heavy increase in carrying capacity. 1) FRP on

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Hollowcore Slabs supported by prestressed

2020-2-8  RE: Hollowcore Slabs supported by prestressed concrete beams Agent666 (Structural) 8 Feb 20 22:29 Retired13, our concrete standard calls up that the material needs to have an in-service coefficient of friction of less than

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Concrete Slabs - Carbon Fiber Reinforcement

Combined with the actual project, the concrete protection layer at the bottom of the floor and the waterproofing at the top are treated. Taking full advantage of the carbon fiber strengthening reinforcement technology, the floor slab was

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HOLLOWCORE FLOOR ROOF SOLUTIONS - Lafarge

2021-8-27  Concrete Hollowcore Solutions Slab Section and Material Properties 12" Hollowcore (305 x 1220) The above properties vary. Please call Lafarge for other sections, material properties and structural capacities. Figure 2 - 305 Deep x 1200 Wide Hollowcore Panel Net Area 40 MPa 25 MPa 2400 kg/m3 1860 MPa 1302 MPa Low Relaxation Moment of Inertia

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Hollowcore Flooring - Precast Concrete from

The precast hollowcore flooring system eliminates costly excavation, provision and compaction of infill and provides an immediate dry working platform. Large open spaces can be created with minimum use of internal support and, with

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THE HISTORY OF IPHA - Hollowcore

2019-7-17  Prestressing introduces compressive force to the concrete, preventing cracking that may otherwise occur by reducing tensile stresses at critical points in the element. Eugène Freyssinet (1879-1962) was a French structural and civil engineer. Widely known as the pioneer of prestressing, Freyssinet did not in fact invent the technique.

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