Experimental investigation of static behavior of self consolidating concrete shells made by poly-propylene fibers

Experimental investigation of static behavior of self consolidating concrete shells made by poly-propylene fibers

Shells are one of the most abundant and the most diverse types of structural forms that are found in our physical world. Based on engineering sciences, Shell structures are one of the highest forms of structures and they are made from different materials, for instance concrete. They have different utilization, including: shell covering roofs, water tanks, dams, bridges, tunnels wall and etc. Also use of self-Compacting Concrete as a fluid concrete with a high ability to transport and fullering ...

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Investigating the Effect of Applying Polypropylene Fiber on Compressive Strength of Self-consolidating Concrete

Investigating the Effect of Applying Polypropylene Fiber on Compressive Strength of Self-consolidating Concrete

Mechanical characteristics of fiber concrete is affected by type, percentage, length to diameter ration, context resistance, size and shape of fiber, sample preparing method and size and shape of sand material. Therefore, in order to use in each case, mix design should be prepared and it must be tested. The current research have been designed and conducted in order to examine the effect of applying propylene fiber on pressure behavior of Self- consolidating concrete. Washed sand with fineness ...

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DAMAGE ASSESSMENT OF REINFORCED CONCRETE BEAMS USING HILBERT-HUANG TRANSFORM

DAMAGE ASSESSMENT OF REINFORCED CONCRETE BEAMS USING HILBERT-HUANG TRANSFORM

The detection of damage in reinforced concrete bridge using vibration characteristics has been the topic of much research in the last two decades. Since reinforced concrete structures are nonlinear in behaviour, even with relatively low levels of damage, it is difficult to make a reliable estimate on the modal properties for use in the damage detection/health monitoring. The Hilbert-Huang transform (HHT) comprises the empirical mode decomposition (EMP) of the data and performing the Hilbert ...

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Detection of Damages in Nonlinear Reinforced Concrete Frames

Detection of Damages in Nonlinear Reinforced Concrete Frames

An objective of the structural health monitoring system is to identify the state of the structure and to detect its damagesafter a major event, such as the earthquake, to ensure the reliability and safety of structures. Innovative analysistechniques for the damage detection of structures have been extensively studied recently. However, practical andeffective damage identification techniques remain to be developed for nonlinear structures, in particular nonlinearhysteretic reinforced concrete ...

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Damage Detection of Concrete Beams using Nonlinear Features of Forced Vibration

Damage Detection of Concrete Beams using Nonlinear Features of Forced Vibration

A new indicator is proposed to facilitate the detection of newly induced damage in reinforced concrete(RC) beams, based on the transient characteristics of nonlinear vibration. Two full-scale RC beams,one reinforced with externally bonded fiber-reinforced-polymer sheets, are tested to develop theproposed damage indicator. Both beams are statically and dynamically loaded to correlate thedynamic characteristics of the beams to the damage level. A phenomenological model is developedto simulate the ...

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Crack damage detection of reinforced concrete beams using local stiffness indicator

Crack damage detection of reinforced concrete beams using local stiffness indicator

1Civil Engineering Department, University of Malaya, 50603 Kuala Lumpur, Malaysia2Mechanical Engineering Department, University of Malaya, 50603 Kuala Lumpur, Malaysia3Mechanical Engineering Department, Universiti Malaysia Pahang, Kuantan, Malaysia ...

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Using Non-Linear Vibration Techniques to Detect Damage in Concrete Bridges

Using Non-Linear Vibration Techniques to Detect Damage in Concrete Bridges

vvThere has been much work published in recent years on the use of vibration characteristicsto detect damage in bridges. Almost all of this work has been based on theassumption that the vibration is linear, i.e. the natural frequencies are not dependent onthe amplitude of oscillation. The aim of the work presented here was to investigate thepossibility of using changes in the non-linear vibration characteristics to detect damagein reinforced concrete bridges.These changes in the non-linear ...

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Time reversal of guided waves for damage detection in rebar-reinforced concrete beams

Time reversal of guided waves for damage detection in rebar-reinforced concrete beams

Propagation properties of ultrasonic guided waves in rebar-reinforced concrete beams were investigated in this study for the purpose of damage detection. Rectangular PZT patches were attached at both exposed ends of the rebar to monitor wave transmission along the rebar with and without simulated corrosion in the form of partial material removal of the rebar. Experimental testing demonstrated that the presence of concrete had a significant influence on the propagation of guided waves along the ...

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A Non-destructive Damage Detection Method for Reinforced Concrete Structures Based on Modal Strain Energy

A Non-destructive Damage Detection Method for Reinforced Concrete Structures Based on Modal Strain Energy

In recent years, much research and development has been carried out on the use of vibration characteristics to detect structural damage in various types of structures. Being a type of the widely developed methods, the vibrations based damage detection methods, in particular modal based methods, are found to be promising in assessing the ldquo;health rdquo; condition of a structure in terms of locating and quantifying damage. However, despite of advances in vibration based damage detection ...

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سمینار پایش خوردگی در سازه های بتن مسلح (Corrosion Monitoring of Reinforced Concrete Structures)

سمینار پایش خوردگی در سازه های بتن مسلح (Corrosion Monitoring of Reinforced Concrete Structures)

Welcome to VirgooL.net مقاله ، پاورپوینت ، پایان نامه ---- ویرگــ ، ــول پاورپوینت ارشد سازه موضوع سمینار : سمینار پایش خوردگی در سازه های بتن مسلح (Corrosion Monitoring of Reinforced Concrete Structures) مباحث موجود در پاورپوینت : - مفهوم پایش خوردگی (Concept of corrosion monitoring) - تکنیک های ...

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