Behaviour of Steel Fibre Reinforced Concrete Beam under Cyclic LoadingIOSR Journals
Abstract: This paper describes the influence of steel fibre distribution on the ultimate strength of concrete
beams. An experimental & analytical investigation of the behaviour of concrete beams reinforced with
conventional steel bars and steel fibres under cyclic loading is presented. It is now well established that one of
the important properties of steel fibre reinforced concrete (SFRC) is its superior resistance to cracking and
crack propagation. As a result of this ability to arrest cracks, fibre composites possess increased extensibility
and tensile strength, both at first crack and at ultimate load and the fibres are able to hold the matrix together
even after extensive cracking. The net result of all these is to impart to the fibre composite pronounced post –
cracking ductility which is unheard of in ordinary concrete. The transformation from a brittle to a ductile type
of material would increase substantially the energy absorption characteristics of the fibre composite and its
ability to withstand repeatedly applied, shock or impact loading. Tests on conventionally reinforced concrete
beam specimens, containing steel fibres in different proportions, have been conducted to establish loaddeflection
curves. It was observed that SFRC beams showed enhanced properties compared to that of RC beams
with steel fibres. The experimental investigations are validated with the analytical studies carried out by finite
element models using ANSYS.
Keywords: Steel fiber, concrete, properties, crack, ductility, technology.
For normal structures we use concrete to build it. But as concrete is a brittle material and it has almost no ductility, it fails in massive load or shock. For giving some ductility to concrete and to fill up the internal micro cracks in concrete we use several fibers. Then the total concrete works as a composite material. Steel Fiber Reinforced Concrete is a composite material having cement, aggregate, and steel fibers.
Behaviour of Steel Fibre Reinforced Concrete Beam under Cyclic LoadingIOSR Journals
Abstract: This paper describes the influence of steel fibre distribution on the ultimate strength of concrete
beams. An experimental & analytical investigation of the behaviour of concrete beams reinforced with
conventional steel bars and steel fibres under cyclic loading is presented. It is now well established that one of
the important properties of steel fibre reinforced concrete (SFRC) is its superior resistance to cracking and
crack propagation. As a result of this ability to arrest cracks, fibre composites possess increased extensibility
and tensile strength, both at first crack and at ultimate load and the fibres are able to hold the matrix together
even after extensive cracking. The net result of all these is to impart to the fibre composite pronounced post –
cracking ductility which is unheard of in ordinary concrete. The transformation from a brittle to a ductile type
of material would increase substantially the energy absorption characteristics of the fibre composite and its
ability to withstand repeatedly applied, shock or impact loading. Tests on conventionally reinforced concrete
beam specimens, containing steel fibres in different proportions, have been conducted to establish loaddeflection
curves. It was observed that SFRC beams showed enhanced properties compared to that of RC beams
with steel fibres. The experimental investigations are validated with the analytical studies carried out by finite
element models using ANSYS.
Keywords: Steel fiber, concrete, properties, crack, ductility, technology.
For normal structures we use concrete to build it. But as concrete is a brittle material and it has almost no ductility, it fails in massive load or shock. For giving some ductility to concrete and to fill up the internal micro cracks in concrete we use several fibers. Then the total concrete works as a composite material. Steel Fiber Reinforced Concrete is a composite material having cement, aggregate, and steel fibers.
Steel fibers for reinforced concrete kasturi metalKasturi Metal
Introduction on Steel and PP Fibers and Fiber reinforced Concrete Concept. Clear information on how fiber reinforced concrete can act as a super crack resistor and make brittle concrete more ductile.
Kasturi Metal Composites P Ltd , India is the largest manufacturer of fibers for concrete reinforcement in India. Its Brand Duraflex™ Steel Fibers – Glued and Loose, and Durocrete™ Macro and Micro Polypropylene Fibers is the most preferred brand in India for various national and International Projects.
Advantages of steel fibre reinforced concrete in industrial floorseSAT Journals
Abstract Ground floor slabs are integral to the efficient operation of an industrial facility. A well designed and constructed floor will increase productivity, reduce maintenance of the building and increase the life of the equipment using the floor. Industrial floor slab has common requirements of high strength, toughness, crack control and durability among others. Most of the industrial floors are constructed using the conventional grade slab where reliance is only on the strength of concrete, and reinforcement is used only for crack control and shrinkage. The use of steel fibres in concrete is advantageous over conventional grade slab wherein the residual load carrying capacity of fibres is used and thus, increases the strength and toughness and gives economy in floor thickness apart from saving in construction time. This paper gives an insight into the advantages of steel fibre reinforced concrete in industrial floors. This work is based on structural design experience of the authors in steel fibre reinforced concrete floor slab for industrial projects and in particular the project recently completed for a food and beverage industry. Keywords: aspect ratio, industrial floors, slabs-on-grade, steel fibres, steel fibre reinforced concrete (SFRC)
Flexible pipeline technology offers major performance advantages and cost savings.
Proposal prepared by Geoff Croker in conjunction with Docklands Science Park.
Experimental study on Torsion behavior of Flange beam with GFRPIJSRD
The Study deals with experimental study using glass fiber polymers in civil science. Repairing represents an important aspect of the construction industry and its importance is increasing due to surrounding conditions or geoenvironmental degradations, increased service loads, reduced ability (to hold or do something) due to (old/allowing to get old/getting older), worsening because of poor construction materials and work quality’s and need for seismic-related have demanded the need for repair and rehabilitation of existing structures. Fiber reinforced polymers has been utilized effectively as a part of numerous applications such as low weight, high quality and capacity to last. Numerous past examination chips away at torsion strengthening were centered on strong rectangular RC Beams with distinctive strip designs and diverse sorts of fiber. Distinctive models were produced to torsion test for strengthening of RC beams and effectively utilized for approval of the test works.In the present work test study was done with a specific end goal to have a superior comprehension the conduct of torsion reinforcing of strong RC flanged T-Beam. A RC T-beam is deliberately examined and intended for torsion like a RC rectangular beam; the impact of cement on flange is disregarded by codes. In the present study impact of width in changing so as to oppose torsion is concentrated on flange width of controlled bars. Alternate specification considered is reinforcing and fiber orientations.
Reinforced arches have a wide range of applications. This paper discuss about use of fibre reinforced polymer (FRP) for strengthening of reinforced concrete arches. The experiment is conducted on shallow arches. Three arches are tested. One is used as a control arch while other two are strengthened using FRP strips in different patterns. Six non symmetric point loads are equally spaced along the arches. The arch is modelled as a polygon.
Fiber Reinforced Concrete (FRC) is a modern Technology in the field of civil engineering, this ppt gives the overall view about the FRC, Uses of FRC in simplest way.
Flexural behaviour of reinforced cement concrete beam wrapped with gfrp sheeteSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Modeling and Analysis of Retrofitted Exterior RC Beam Column connectionmaged salama
The primary tasks of the current study are to:
1. Construct macro models using the pushover analysis procedure for a exterior beam-column joint able to predict the overall behavior, capacity and the modes of failure.
2. Studying the behavior of a CFRP retrofitted exterior beam-column joint constructing a macro model using the pushover analysis procedure in order to predict its overall behavior, capacity and the modes of failure.
3. construct a model of ten-multi-story structure using the pushover analysis procedure able predict its overall behavior. Safety of construction members against earthquake and its mode of failure
4. studying the need of using retrofitting withstand the equivalent static force calculated by response spectrum analysis for the building by retrofitting only the first story then, retrofitting two stories and so on, and predict the overall behavior for each case until the capacity of building reach the safe zone against the earthquake
Retrofitting of Beam-Column Joint using Carbon Fibre Reinforced Polymer and G...Satyam Vijay Bhosale
Retrofitting of an existing building is immensely essential for the deteriorated and damaged structure in Engineering and Medical fields. It refers to endowing the structure with a service level higher than that initially planned by modifying the structures, not necessarily damage area. Beam-column joints, being the lateral and vertical load transferring connections in reinforced concrete structures are particularly vulnerable to failures and hence the satisfactory performance of these joints is key to control the performance of connecting structural members during any event.
The project involves the study of the load carrying capacity of the beam-column joint after the application of the CFRP (Carbon Fiber Reinforced Polymer) and GFRP (Glass fibre Reinforced Polymer) sheets. Five beam-column joint models were cast out of which one model was the control specimen and others were cast for the purpose of the retrofitting. Four specimens were retrofitted by L-shape and straight configurations. The project focused on the effect of using the CFRP sheets and GFRP sheets for enhancing the strength and ductility of the beam-column joint. The wraps were provided to prevent the shear failure of the beam-column joint. The failure criteria including ultimate capacity, mode of failure, initial stiffness, ductility and developed ultimate strain in the reinforcing steel and respective sheet were considered and then compared.
Te muestra la felicidad desde diferentes puntos de vista, ademas, te enseña la formula para conseguir dicho objetivo: ser feliz. Por otro lado, espero que le brinde mucha información ya que le puse mucho empeño.
Steel fibers for reinforced concrete kasturi metalKasturi Metal
Introduction on Steel and PP Fibers and Fiber reinforced Concrete Concept. Clear information on how fiber reinforced concrete can act as a super crack resistor and make brittle concrete more ductile.
Kasturi Metal Composites P Ltd , India is the largest manufacturer of fibers for concrete reinforcement in India. Its Brand Duraflex™ Steel Fibers – Glued and Loose, and Durocrete™ Macro and Micro Polypropylene Fibers is the most preferred brand in India for various national and International Projects.
Advantages of steel fibre reinforced concrete in industrial floorseSAT Journals
Abstract Ground floor slabs are integral to the efficient operation of an industrial facility. A well designed and constructed floor will increase productivity, reduce maintenance of the building and increase the life of the equipment using the floor. Industrial floor slab has common requirements of high strength, toughness, crack control and durability among others. Most of the industrial floors are constructed using the conventional grade slab where reliance is only on the strength of concrete, and reinforcement is used only for crack control and shrinkage. The use of steel fibres in concrete is advantageous over conventional grade slab wherein the residual load carrying capacity of fibres is used and thus, increases the strength and toughness and gives economy in floor thickness apart from saving in construction time. This paper gives an insight into the advantages of steel fibre reinforced concrete in industrial floors. This work is based on structural design experience of the authors in steel fibre reinforced concrete floor slab for industrial projects and in particular the project recently completed for a food and beverage industry. Keywords: aspect ratio, industrial floors, slabs-on-grade, steel fibres, steel fibre reinforced concrete (SFRC)
Flexible pipeline technology offers major performance advantages and cost savings.
Proposal prepared by Geoff Croker in conjunction with Docklands Science Park.
Experimental study on Torsion behavior of Flange beam with GFRPIJSRD
The Study deals with experimental study using glass fiber polymers in civil science. Repairing represents an important aspect of the construction industry and its importance is increasing due to surrounding conditions or geoenvironmental degradations, increased service loads, reduced ability (to hold or do something) due to (old/allowing to get old/getting older), worsening because of poor construction materials and work quality’s and need for seismic-related have demanded the need for repair and rehabilitation of existing structures. Fiber reinforced polymers has been utilized effectively as a part of numerous applications such as low weight, high quality and capacity to last. Numerous past examination chips away at torsion strengthening were centered on strong rectangular RC Beams with distinctive strip designs and diverse sorts of fiber. Distinctive models were produced to torsion test for strengthening of RC beams and effectively utilized for approval of the test works.In the present work test study was done with a specific end goal to have a superior comprehension the conduct of torsion reinforcing of strong RC flanged T-Beam. A RC T-beam is deliberately examined and intended for torsion like a RC rectangular beam; the impact of cement on flange is disregarded by codes. In the present study impact of width in changing so as to oppose torsion is concentrated on flange width of controlled bars. Alternate specification considered is reinforcing and fiber orientations.
Reinforced arches have a wide range of applications. This paper discuss about use of fibre reinforced polymer (FRP) for strengthening of reinforced concrete arches. The experiment is conducted on shallow arches. Three arches are tested. One is used as a control arch while other two are strengthened using FRP strips in different patterns. Six non symmetric point loads are equally spaced along the arches. The arch is modelled as a polygon.
Fiber Reinforced Concrete (FRC) is a modern Technology in the field of civil engineering, this ppt gives the overall view about the FRC, Uses of FRC in simplest way.
Flexural behaviour of reinforced cement concrete beam wrapped with gfrp sheeteSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Modeling and Analysis of Retrofitted Exterior RC Beam Column connectionmaged salama
The primary tasks of the current study are to:
1. Construct macro models using the pushover analysis procedure for a exterior beam-column joint able to predict the overall behavior, capacity and the modes of failure.
2. Studying the behavior of a CFRP retrofitted exterior beam-column joint constructing a macro model using the pushover analysis procedure in order to predict its overall behavior, capacity and the modes of failure.
3. construct a model of ten-multi-story structure using the pushover analysis procedure able predict its overall behavior. Safety of construction members against earthquake and its mode of failure
4. studying the need of using retrofitting withstand the equivalent static force calculated by response spectrum analysis for the building by retrofitting only the first story then, retrofitting two stories and so on, and predict the overall behavior for each case until the capacity of building reach the safe zone against the earthquake
Retrofitting of Beam-Column Joint using Carbon Fibre Reinforced Polymer and G...Satyam Vijay Bhosale
Retrofitting of an existing building is immensely essential for the deteriorated and damaged structure in Engineering and Medical fields. It refers to endowing the structure with a service level higher than that initially planned by modifying the structures, not necessarily damage area. Beam-column joints, being the lateral and vertical load transferring connections in reinforced concrete structures are particularly vulnerable to failures and hence the satisfactory performance of these joints is key to control the performance of connecting structural members during any event.
The project involves the study of the load carrying capacity of the beam-column joint after the application of the CFRP (Carbon Fiber Reinforced Polymer) and GFRP (Glass fibre Reinforced Polymer) sheets. Five beam-column joint models were cast out of which one model was the control specimen and others were cast for the purpose of the retrofitting. Four specimens were retrofitted by L-shape and straight configurations. The project focused on the effect of using the CFRP sheets and GFRP sheets for enhancing the strength and ductility of the beam-column joint. The wraps were provided to prevent the shear failure of the beam-column joint. The failure criteria including ultimate capacity, mode of failure, initial stiffness, ductility and developed ultimate strain in the reinforcing steel and respective sheet were considered and then compared.
Te muestra la felicidad desde diferentes puntos de vista, ademas, te enseña la formula para conseguir dicho objetivo: ser feliz. Por otro lado, espero que le brinde mucha información ya que le puse mucho empeño.
The kodansha kanji learners dictionary.
Jika, Membutuhkan Ebook ini, Silahkan Kirim E-mail kalian
Ke ifilesunlimited@gmail.com
Dengan Syarat :
1. Ceritakan alasannya kalian.
2. Nama kalian lengkap.
3. Judul Buku yang Di inginkan.
Terima kasih,
Link download akan dikirimkan.
1 x 24 Jam
Numerical Investigations on Blast Protection System with Metallic Tube Core S...IJLT EMAS
Effect of blast loads from explosion can be mitigated by using thick armor systems that are often heavy and significantly increase the self-weight of the structure. In the design of structure for blast protection, sacrificial claddings which consist of high energy absorbing elements are used. A sandwich type protective structure consists of light weight core which is often used for blast mitigation. The choice of core type has an influence on the performance of sandwich panel. The cores can be of wood, foam material and tubular elements. In this study, behavior of sandwich panel with square tubular core is investigated through numerical studies. Panel is made of mild steel having top plate dimension of 150 mm x 150 mm x 2.5 mm; bottom plate of 150 mm x 150 mm x 5 mm and square tube core of 12.5 mm x 12.5 mm with 0.6 mm thickness. A finite element model is developed and validated using experimental results in literature. Parametric studies are carried out using the validated finite element model. By varying the tube length of the core, the responses of the panels in terms of energy absorption and reaction forces are compared.
This project report analyzes the strength and stability of a composite diving board modeled with ANSYS. The aim of this report is to find if a composite diving board has comparable mechanical characteristics with that of an Olympic diving board.
Design and Analysis of Acrylic Paneled Rectangular Towing TankIJMERJOURNAL
ABSTRACT: In ship design, knowing drag resistance coefficient of a ship in the design phase is very important in proper calculation of the required propulsion power. Using rectangular towing tank and a scale model of the proposed designed ship is an important step to calculate the drag resistance coefficient where the scale model is towed in the tank and drag force calculated using load cells. In some cases using a transparent wall towing tank is important in order to monitor the model behavior during the drag test. In order to achieve a clear side view of the model during test a glass or acrylic wall towing tank is suitable in such situation. Glass is not considered unless it treated to absorb impact and side wall fluctuation due to water sloshing during the test. Acrylic wall has some advantage over glass wall as acrylic material is mush ductile than glass one. In this design of transparent wall towing tank acrylic wall is used. To avoid large deflection in the acrylic walls due to lateral pressure of the water, stiffeners are introduced in the design. Comparison of different cases of the stiffeners is carried out and results of these analysis are discussed later in this paper.
A reinforced concrete slab or block which interconnects a group of piles and acts
as a medium to transmit the load from wall or column to the Piles is called a Pile
Cap. The Pile cap should normally be rigid so as to distribute the forces equally on
the piles of a group. In general it is designed like a footing on soil but with the
difference that instead of uniform reaction from the soil, the reactions in this case
are concentrated either point loads or distributed.
1. FIBERGLASS BOX BEAM: J. Beam Wellington III
Shawn Baker and Tim Carlson
Dept. of Materials Science & Engineering, University of Washington
Bridge #:
S6-3946
PROBLEM STATEMENT
Design a box beam using a combination of
fiberglass plies and resin that will hold a
distributive load of 7,000 lbf applied at the
center.
MANUFACTURING
High thread count fiberglass was used in the final iteration to avoid
soaking up unnecessarily large amounts of resin. Most plies were cut
using an automated fabric cutter or by hand (Figure 1). Each ply is
then wetted with resin and assembled in specific directions to
withstand the most applied force (Figure 2 and 3). The top, bottom,
core, and webs are pressed and bound tightly together (Figure 4 and
5). The beam is wrapped in breather and sealed in an air-tight bag to
be cured in the autoclave at 270ᵒ F for 2 hours (Figure 6).
TESTING
The first iteration was made with wide tow fibers that held
over 15000 lbf, but weighed 1432g. The second iteration
was made with more consideration of optimizing weight
while maintaining strength. However, the second beam
failed early at 3429 lbf at 698g because of dry spots at the
supports of the beam that acted as stress concentrators.
The final build maintains this optimized design while
ensuring adequate resin distribution.
DESIGN
There are four components to this beam,
entirely made of fiberglass weave fabric:
• Two C-channels on either side of a center
square section are constructed with plies
mostly oriented at ±45° angles to account for
shear stress.
• Top flange plies oriented in 0° or 0°/90°
directions and consists of more plies than the
bottom flange because of a greater
compressive stress.
• Bottom flange has more plies of fiberglass at
the ends, to withstand more tensile stress.
FUTURE IMPROVEMENTS
• Minimize resin content and pooling between plies to
reduce the weight of the beam.
• All beams tested failed at the ends of the beam. I suggest
to replace more plies on the top and bottom with tabs to
strengthen the ends of the beam while maintaining low
weight.
ACKNOWLEDGEMENTS
• Brian Flinn, Ph. D- UW MSE
• UW SAMPE Officers & Members
• Jeffrey Wollschlager- Altair EngineeringFigure 6: Vacuum bagged beam
Figure 8: Side by side comparison of the first two
iterations.
Figure 1: Cutting unidirectional plies Figure 2: Wet layup process Figure 3: Bottom being assembled
Figure 4: Pressing the core
together with the bottom and
top
Figure 5: All pieces of the beam are assembled together
Figure 7: Using liquid nitrogen
to help release the beam from
the core tool
Figure 9: Load vs. extension graph of second iteration beam
that failed early
Figure 10: Assembly drawing of the beam