Strengthening of reinforced concrete beams using ultra

Strengthening of Concrete Structures Using UHPC

UHPC is a material which exhibits excellent mechanical properties and durability. Beside new structures it is also convenient for strengthening of existing structures. The paper investigates the possibilities of strengthening experimentally. A part of the experimental program is presented which is focused on bond of UHPC and existing concrete and on behaviour in bending.

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Strengthening of Reinforced Concrete Beams using FRP

Excessive fatigue deterioration is usually experienced when Reinforced Concrete structural elements are subjected to loadings. This emphasizes the desire to strengthen as well as improve the fatigue performance and extend the fatigue life of RC structural components particularly beams. During the last few decades, strengthening of concrete structural elements by fibre-reinforced polymer (FRP

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Advantages and Disadvantages of Reinforced Concrete

Disadvantages of Reinforced Concrete. The tensile strength of reinforced concrete is about one-tenth of its compressive strength. The main steps of using reinforced concrete are mixing, casting, and curing. All of this affects the final strength. The cost of the forms used for casting RC is relatively higher.

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Structural Performance of Reinforced Concrete (RC) Moment

This study investigates structural behaviors of reinforced concrete (RC) moment frame connections strengthened using three different FRPs with different cross section configurations. The novelty of this research is the strengthening of a beam-column connection with FRP composites, where the joint consists of a weak column and a strong one that plays a vital role in the RC element. It is also

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Effects of Thickness of Ultra High-Performance Fiber

Abstract: Two groups of rectangular beams, comprising of six specimens, the first group (L) were provided with four longitudinal bars, one at each corner while the second groups of beams (S) were fully reinforced with longitudinal bars and transverse reinforcement. Each group consisted of three beams. Two beams have been strengthened with ultra high performance fiber concrete (UHPFC) on four

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Finite element analysis of flexural behavior of different

beam,respectively,which can effectively improve the flexural performance of the ultra high strength concrete beams. 1.Introduction . In recent years, with the development of the construction industry, the concrete has been developed to ultrahigh strength and high performance. The ultra high strength concrete of ultra

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PDF Behavior of Reinforced High and Ultra High Strength

reinforced ultra-high strength concrete (UHSC)/ultra-high performance concrete (UHPC). The effects of various parameters such as concrete types, concrete strength (ranging from 70 MPa to 180 MPa) and , shear span-depth ratio (afd) on strength characteristics of reinforced beams with shear and longitudinal reinforcements are studied.

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Strengthening Damaged Reinforced Concrete Beams and

polymer (CFRP) plates to strengthen damaged reinforced concrete beams and slender columns. In the first phase, two different pre-repair loading histories were simulated in seven 3000x300x150 mm reinforced concrete beams, namely cracking within the elastic range, and overloading in the plastic range.

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Flexural Strength of Ultra High Strength Concrete Beams

The purpose of this paper is to examine the basic behavior of ultra high strength concrete beams reinforced with steel fibers. The experimental parameters included steel rebar ratio less than 0.02 and the method of placing ultra high performance

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Pretreatment of Woven Jute FRP Composite and Its Use in

The study includes the effect of flexural strengthening provided by woven jute FRP, study of different failure modes, load deflection behavior, effect on the first crack load, and ultimate flexural strength of concrete beams strengthened using woven jute FRP subjected to bending loads.

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Frontiers | Shear Design of High Strength Concrete Beams

This paper presents the criteria for the shear design of high strength concrete (HSC) beams in moment resisting frames (MRFs). The formulation of an analytical model is provided for the case of beams with longitudinal reinforcement in the presence of transverse stirrups. The model is of additive type, in the meaning that the shear resistance of the beam is evaluated as the sum of several

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Experiment on non-damaged RC beams strengthened by high

In order to study the flexural performance of reinforced concrete (RC) beams strengthened by high-strength steel wire strand (HSSWS) meshes reinforced engineered cementitious composites (ECC), the bending tests were performed on seven non-damaged RC beams considering the influence factors such as the steel strand diameter, the longitudinal steel strand reinforcement rate, formula of ECC and

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Ultra-High Performance Concrete

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 specified durability, tensile ductility and toughness requirements; fibers are generally included in the mixture to achieve specified requirements.

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Strengthening concrete beams with steel plates

Beam reinforcement. In concrete structure, the beam is strengthened by U-shaped hoop and anchored by expansion bolt. All expansion bolts are plum-shaped. Beam reinforcement at deformation joints. A section of 1-12 axis beam at the deformation joint was originally designed to be reinforced with U-shaped stirrups.

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STRUCTURE magazine | Strengthening of Concrete Structures

Fiber-reinforced polymer (FRP) composites have been used for structural strengthening in the United States for almost 25 years. During this period, acceptance of FRP composites as a mainstream construction material has grown, and so has the number of completed FRP strengthening projects.

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PDF Strengthening of Reinforced Concrete Structures

Diab, Y. G. (1998), "Strengthening of RC beams by using sprayed concrete: experimental approach", Engineering Structures, vol. 20, no. 7, pp. 631-643. Garden H. N. and Hollaway L. C. (1998), " An experimental study of the influence of plate end anchorage of carbon fibre composite plates used to strengthen reinforced concrete beams

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FLEXURAL STRENGTHENING OF PRECAST CONCRETE

The following study investigated an efficient use of high strength fiber-reinforced concrete (HSFRC) on standard reinforced concrete beams. Two non-proprietary HSFRC mixes were developed and then applied as an external laminate to the tension face of reinforced concrete beams. Standard reinforcing bars were embedded within the laminate matrix.

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PDF Flexural performance of reinforced concrete beams

promising areas of application of this material is in the strengthening/ repair of concrete structures. Recently, novel techniques using Fibre Reinforced Concrete (FRC) and Ultra High Performance Fibre Reinforced Concrete (UHPFRC) layers or jackets have been proposed to improve the performance of existing structural members [1, 6, 26].

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The strengthening and deformation behaviour of reinforced

Read "The strengthening and deformation behaviour of reinforced concrete beams upgraded using prestressed composite plates, Materials and Structures" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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how to strengthening a concrete beam with carbon fiber

how to strengthening a concrete beam with carbon fiber reinforced polymer?

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Size effect on shear strength of reinforced concrete beams

To examine the effect of tension reinforcement ratio and effective depth on shear strength of reinforced concrete beams, this study has conducted experiments in which the effective depth (150, 300, 500, and 780 mm) and tension reinforcement ratio (1%, 2%, and 3%) are employed as variables.

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Improving the Failure Mode of Over-Reinforced Concrete

Jul 22,  · In this study, 11 over-reinforced concrete beams were cast (1 as a control specimen and 10 as strengthened beams). The study’s strengthening material was an ultra-high-performance strain-hardening cementitious composite (UHP-SHCC). The effect of shear connectors with the strengthening material was investigated.

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PDF Experimental Study on Shear Strength for Ultra-high

estimation at High-strength concrete beams containing steel fiber. To know that concrete strength and steel fiber content how to effect on the beams. 2.1 Sharma (1986) V u =kf t (d/a) 0.25 (1) Shear span ratio and tensile strength effect on shear strength. It can use this proposal simply , when we only have concrete tensile strength data.

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PDF Strengthening of Reinforced Concrete Beams Using Cfrp

Haya H. Mhanna et al., ( ) experimented and made a Shear Strengthening of Reinforced Concrete Beams Using CFRP Wraps. The need to retrofit existing reinforced concrete (RC) structures have increased over the decades due to corrosion of steel reinforcement inside the concrete, neglect and overuse, and increased loading.

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Flexural Strengthening of Precast Concrete Beams Using a

The following study investigated an efficient use of high strength fiber-reinforced concrete (HSFRC) on standard reinforced concrete beams. Two non-proprietary HSFRC mixes were developed and then applied as an external laminate to the tension face of reinforced concrete beams. Standard reinforcing bars were embedded within the laminate matrix.

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Reinforced Concrete Design

reinforcement ratio in concrete beam design = A s /bd = balanced reinforcement ratio in concrete beam design = shear strength in concrete design Reinforced Concrete Design Structural design standards for reinforced concrete are established by the Building Code and Commentary (ACI 318-11) published by the American Concrete

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PDF Research Paper SHEAR STRENGTHENING OF DIFFERENT BEAMS

The paper also represents the effect of different parameters on the strength of beams strengthened externally with FRP sheets or strips. KEYWORDS Strengthening, FRP, Shear, Box Beams, T-Beams, Normal RC Beams, Deep Beams. I. INTRODUCTION Strengthening of Reinforced Concrete Beam by FRP is a very popular technique. The shear failure in any

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PDF Structural Strengthening/Repair of Reinforced Concrete (RC

high performance concrete (HPC), high strength concrete (HSC), ultra-high performance concrete (UHPC), steel fiber-reinforced high strength lightweight self-compacting concrete (SHLSCC), fabrics reinforced cementitious material (FRCM) and so on have been used to strengthen RC beams using various fiber-reinforced cementitious materials

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STRENGTHENING OF RC BEAMS USING FRP SHEET

Apr 13,  · Khalifa A, Tumialan G, Nanni A, and Belarbi A, “Shear Strengthening of Continuous Reinforced Beams Using Externally Bonded Carbon Fiber Reinforced Poly- mer Sheets”,In: Fourth International Symposium on Fiber Reinforced Polymer Reinforcement for Reinforced Con- crete Structures, Baltimore, MD, American Concrete In- stitute, pp. 995–1008

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PDF Shear strengthening of reinforced concrete beams

Shear strengthening of reinforced concrete beams strengthened using embedded through section steel bars Matteo Breveglieria,⇑, Alessandra Aprilea, Joaquim A.O. Barrosb a Dep. of Eng., University of Ferrara, 44121 Ferrara, Italy bISISE, Dep. of Civil Eng., Univ. of Minho, Azurém, 4810-058 Guimarães, Portugal article info Article history:

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PDF Shear strengthening of reinforced concrete beams with CFRP

shear strength of continuous reinforced concrete (RC) beams. A total of seven, two-span concrete continuous beams with rectangular cross-sections were tested. The control beam was not strengthened, and the remaining six were strengthened with different arrangements of CFRP sheets. The experimental results show that the shear strength of

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