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Showing 1 to 20 of 39 for “"concrete compressive strength"”.
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Behaviour of reinforced concrete deep beams
… variables on the behaviour of reinforced concrete deep beams : i) Concrete compressive strength ii) Reinforcement iii) Geometry. The model beams were all of 1500mm span, with a depth of 750mm. This span to depth ratio of 2 corresponds to the upper limit, to which the recommendations for …
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Behaviour of continuous concrete slabs reinforced with FRP bars. Experimental and computational investigations on the use of basalt and carbon fibre reinforced polymer bars in continuous concrete slabs.
… reinforcement for simple and continuous concrete slabs is presented. Eight continuously and four simply concrete slabs were constructed and tested to failure. Two continuously supported steel reinforced concrete slabs were also tested for comparison purposes. The slabs were classified …
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Bond Behavior of Fiber Reinforced Polymer Bars Under Hinged Beam Conditions
… reinforcing bars, embedded in normal weight concrete (NWC) hinged beam-end specimens, tested in accordance with two laboratory conditions. Reinforcing bars of different diameter, material configuration, and finished surface preparation were tested for bond strength parameters determined in …
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Shear strength of concrete beams reinforced with glass fiber reinforced polymer bars without stirrups
… as an alternative to steel bars for reinforced concrete (RC) structures is gaining acceptance among the structural engineers. The investigation of structure performance of FRP-RC members has become a critical issue. Extensive researches have been conducted to investigate the shear behavior of RC …
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FRP Confined Reinforced Concrete Circular Cross Section Seismic Applications
… (FRP), as a material with potential to increase strength and ductility of columns in conjunction with capacity design methodology, has promise for seismic design. By investigating the displacement, ductility, and flexural strength properties of FRP confined reinforced concrete circular cross …
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Shear Behavior of Reinforced Concrete Beams and Prestressed Concrete Beams
"In the last decades, developments in high-strength concrete materials are rapid, but codes of practice still limits the concrete compressive strength in design of concrete structures due to a lack of experimental research data. As an effort to overcome the limitation to the use of high strength …
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Strength Calculation Model for Standoff Screws in Composite Joists
… 8 standoff screws. The goal is to develop a strength prediction equation and determine reliability parameters compatible with the Load Factor Resistance Design (LRFD) procedure that would allow the use of this shear connector in design of composite floor systems. The study considers results …
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Shear Strength of Full-Scale Prestressed Lightweight Concrete Girders with Composite Decks
Although design codes have accepted lightweight concrete as a suitable structural material for nearly 50 years, there is still a good deal of uncertainty as to how to calculate the strength of this material when designing for shear in beams. Design codes tend to penalize lightweight concrete due to …
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Machine Learning Based Prediction of Reinforced Concrete Members’ Shear Friction Capacity
… by which shear forces are transferred across concrete-to-concrete interfaces. Shear transfer across a plane involves a complex interaction of several phenomena, such as concrete surface condition and cohesion, concrete strength, and steel reinforcement strength and reinforcement ratio. …
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Flexural Behaviour of Geopolymer Concrete T-beams Reinforced with FRP or Hybrid FRP/Steel bars
… to examine the flexural behaviour of geopolymer concrete T-beams reinforced with GFRP or Hybrid GFRP/Steel bars. To achieve this aim, twelve geopolymer concrete flanged beams reinforced with various combinations with steel and GFRP bars were experimentally tested, and comprehensive computational …
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An experimental study and finite analysis of punching shear failure in steel fibre-reinforced concrete ground -suspended floor slabs
… researchers on punching shear behaviour of concrete slabs is presented. After that, a constitutive model for SFRC was developed. This is followed by a preliminary finite element analysis (FEA) and experimental study of SFRC slabs. Finally, a finite element model was developed. The literature …
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Behaviour of elliptical tube columns filled with self-compacting concrete
… tube columns filled with self-compacting concrete (SCC). In total, ten specimens, including two empty columns, were tested to failure. The main parameters investigated were the length and the sections of the columns, and the concrete compressive strength. Artificial Neural Network (ANN) …
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Investigation of Time-Dependent Deflection in Long Span, High Strength, Prestressed Concrete Bridge Beams
Accurate camber prediction in prestressed concrete bridge beams is important to all parties involved in bridge design and construction. Many current prestress loss prediction methods, necessary for proper camber calculation, were developed many years ago and are predicated on assumptions that may …
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The Durability of Mortar with Ground Clay Brick as Partial Cement Replacement
… and types of ground brick in mortar and concrete. Compressive strength, pore size distribution and sorptivity of mortar generally all benefit from the presence of ground brick and the greatest effect can be seen after water curing for one year. Compressive strength of concrete is also …
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Prestressed PCBT Girders Made Continuous and Composite with a Cast-in-place Deck and Diaphragm
… PCBT girders made composite with a cast-in-place concrete deck and continuous over several spans through the use of continuity diaphragms. The current design procedure in AASHTO states that a continuity diaphragm is considered to be fully effective if a compressive stress develops in the bottom of …
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Bond of glass fibre reinforced polymer bars in high strength concrete
… fibre reinforced polymer (GFRP) bars with high concrete strength. The current research project aims to compare between bond measured from a pull-out test and a hinged beam test for GFRP bars embedded in high strength concrete. Different parameters influencing bond such as GFRP bar diameter, …
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Experimental study of fracture energy for foamed concrete
Foamed concrete has recently gained attention as an alternative material to normal concrete in structural engineering. As a structural component, foamed concrete has many advantages given its characteristics such as high strength with low density, good serviceability, and lightweight. Therefore, …
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Performance of Full-Scale Reinforced Concrete Columns Subjected to Extreme Earthquake Loading
Seven full-scale reinforced concrete (RC) columns were tested at the Multi-Axial Subassemblage Testing (MAST) Laboratory of the University of Minnesota to investigate their performance under extreme seismic events that would produce near-collapse conditions. One of the goals of the tests was to …
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Circular Reinforced Concrete Columns Damaged By Fire and Retrofitted With Cfrp and Steel Jacketing
… decades, the post-fire behavior of reinforced concrete (RC) columns with normal and high-strength concrete has become an important research topic. Numerous studies have demonstrated that RC columns exhibit good fire resistance owing to the thermal properties of concrete. Therefore, reinforced …
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Diagonally-Reinforced Concrete Coupling Beams with High-Strength Steel Bars
The use of high-strength steel in diagonally reinforced coupling beams was investigated with the aims of minimizing reinforcement congestion and increasing the maximum permissible design shear stress without compromising behavior under large displacement reversals. Five large-scale diagonally …
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