Damage Assessment of Reinforced Concrete Structures: A Review

Damage may be assessed using several damage indices with values associated with different structural damage states. The usefulness of a variety of current response-based damage indices in seismic damage assessment is addressed and critically assessed. A novel rational damage assessment method is provided, which measures the structure’s physical reaction characteristics. A practical method based on various analyses is given to evaluate the damaged structures in earthquakes of different intensities. This paper provides an overview of previous research works on the damage assessment of the reinforced concrete structures. This study may be helpful for easy understanding about the damage assessment of reinforced concrete structures and reduce the impacts of disaster and surrounding structures.

Damage Assessment of Reinforced Concrete Structures: A Review

Damage may be assessed using several damage indices with values associated with different structural damage states. The usefulness of a variety of current response-based damage indices in seismic damage assessment is addressed and critically assessed. A novel rational damage assessment method is provided, which measures the structure’s physical reaction characteristics. A practical method based on various analyses is given to evaluate the damaged structures in earthquakes of different intensities. This paper provides an overview of previous research works on the damage assessment of the reinforced concrete structures. This study may be helpful for easy understanding about the damage assessment of reinforced concrete structures and reduce the impacts of disaster and surrounding structures.

An Experimental Study on Mechanical Properties of Self Compacting Concrete by using Fiber Reinforcement

The invention of Self Compacting Concrete has been tremendous and continuing growth in the working area over the past decade, culminating in its widespread usage in today’s reality. It outperforms regular cement in application and completion, cost, work reserve funds, and solidity. The addition of strands enhances its qualities, particularly those related to SCC’s post- break behaviour. The goal is to investigate the strength properties of SCC when mixed with various types of strands. Different strand types and filament speeds are among the variables studied. The essential characteristics of SCC, including strength, break energy, sturdiness, and sorptivity, must be controlled. The hydrated design and security development between fiber and blend will be examined using an electron microscope to examine the tiny building of several mixes. 12mm cut glass fiber, carbon fiber, and basalt fiber will be used in the request, as they have been for quite some time. 0.0 percent, 0.1 percent, 0.15 percent, 0.2 percent, 0.25 percent, and 0.3 percent of strands are removed based on volume. The request is broken down into two parts. The first half involves creating a planned blend for SCC of a detailed assessment, such as M30. The second half involves adding filaments such as glass, basalt, and carbon strands to the SCC blends and evaluating and verifying their plastic and hardened properties. The experiment demonstrates a modest improvement in SCC aspects by adding strands of various types and altering the volume. Carbon fiber is the most improved in the more challenging state, followed by Basalt fiber and Glass fiber, and the least improved in the plastic state due to its high-water absorption. Glass fiber fared better in the plastic state. Basalt fiber fared better in the present study regarding cost, appropriate amount, and overall viability.

A Review on Mechanical Properties of Sustainable Concrete by using Rise husk ash and hydrated lime

Concrete is a commonly used construction material all over the globe. Environmentally conscious construction is essential in today’s society. By using the proper materials, we may achieve long-term construction. RHA is often used as a cementitious product replacement, and in such cases, we may mix RHA with hydrated lime. Many research has been conducted on RHA, and they all indicate that it outperforms other kinds of concrete. The importance of rice husk ash in construction and its applications are the subject of this essay. Many studies have been undertaken to identify appropriate replacements for cement in concrete mixes to reduce our over-reliance on cement as a component in concrete production owing to its contribution to CO2 emissions. This article examined the research on the usage of fly ash and rice husk ash as partial concrete replacements and the chemical composition of these materials, and their impact on concrete compressive strength. The mix was created using a logical approach in which solid components were set, and water and superplasticizer content were modified to get the best viscosity and flowability. Rice husk ash (RHA) is a rice milling byproduct. Its usage as a soil stabilizer provides an environmentally friendly alternative to ultimate disposal. Because RHA is not self-cementitious, a hydraulic binder, such as lime, must be added to create cement types to strengthen the soil. In sandy soils, studies on stabilization using RHA and lime mixtures were carried out. RHA of rice husk incineration in ordinary ovens with no temperature control and laboratory burning at regulated temperatures were utilized. In soil mixes with varying RHA and lime concentrations, cementitious compounds were found to develop. Soils treated with RHA and lime underwent unconfined compression strength testing. All RHA and lime concentrations and periods tested showed strength gains, and all materials created were changed rather than stabilized. The use of RHA to improve sandy soils offers environmental, social, and economic advantages as an alternative to ultimate disposal.

An Experimental Study on Mechanical Properties of Self Compacting Concrete by using Fiber Reinforcement

The invention of Self Compacting Concrete has been tremendous and continuing growth in the working area over the past decade, culminating in its widespread usage in today's reality. It outperforms regular cement in application and completion,cost, work reserve funds, and solidity. The addition of strands enhances its qualities, particularly those related to SCC's post- break behaviour. The goal is to investigate the strength properties of SCC when mixed with various types of strands. Different strand types and filament speeds are among the variables studied. The essential characteristics of SCC, including strength, break energy, sturdiness, and sorptivity, must be controlled. The hydrated design and security development between fiber and blend will be examined using an electron microscope to examine the tiny building of several mixes. 12mm cut glass fiber, carbon fiber, and basalt fiber will be used in the request, as they have been for quite some time. 0.0 percent, 0.1 percent, 0.15 percent, 0.2 percent, 0.25 percent, and 0.3 percent of strands are removed based on volume. The request is broken down into two parts. The first half involves creating a planned blend for SCC of a detailed assessment, such as M30. The second half involves adding filaments such as glass, basalt, and carbon strands to the SCC blends and evaluating and verifying their plastic and hardened properties. The experiment demonstrates a modest improvement in SCC aspects by adding strands of various types and altering the volume. Carbon fiber is the most improved in the more challenging state, followed by Basalt fiber and Glass fiber, and the least improved in the plastic state due to its high-water absorption. Glass fiber fared better in the plastic state. Basalt fiber fared better in the present study regarding cost, appropriate amount, and overall viability

A Review on Mechanical Properties of Sustainable Concrete by using Rise husk ash and hydrated lime

Concrete is a commonly used construction material all over the globe. Environmentally conscious construction is essential in today's society. By using the proper materials, we may achieve long-term construction. RHA is often used as a cementitious product replacement, and in such cases, we may mix RHA with hydrated lime. Many research has been conducted on RHA, and they all indicate that it outperforms other kinds of concrete. The importance of rice husk ash in construction and its applications are the subject of this essay. Many studies have been undertaken to identify appropriate replacements for cement in concrete mixes to reduce our over-reliance on cement as a component in concrete production owing to its contribution to CO2 emissions. This article examined the research on the usage of fly ash and rice husk ash as partial concrete replacements and the chemical composition of these materials, and their impact on concrete compressive strength. The mix was created using a logical approach in which solid components were set, and water and superplasticizer content were modified to get the best viscosity and flowability. Rice husk ash (RHA) is a rice milling byproduct. Its usage as a soil stabilizer provides an environmentally friendly alternative to ultimate disposal. Because RHA is not self-cementitious, a hydraulic binder, such as lime, must be added to create cement types to strengthen the soil. In sandy soils, studies on stabilization using RHA and lime mixtures were carried out. RHA of rice husk incineration in ordinary ovens with no temperature control and laboratory burning at regulated temperatures were utilized. In soil mixes with varying RHA and lime concentrations, cementitious compounds were found to develop. Soils treated with RHA and lime underwent unconfined compression strength testing. All RHA and lime concentrations and periods tested showed strength gains, and all materials created were changed rather than stabilized. The use of RHA to improve sandy soils offers environmental, social, and economic advantages as an alternative to ultimate disposal

The Effects of Some Mechanical Parameters of a Developed Millet Thresher on Millet Threshing and Cleaning Efficiencies

Some mechanical and process parameters of a developed millet thresher have been optimized using a numerical optimization technique. The machine threshes millet panicles and cleans the grains from the straw. The speed of threshing and the number of pegs attached to the threshing drum were mechanical parameters investigated, while the moisture content was the process parameter under investigation. Threshing efficiency, cleaning efficiency, and percentage losses were used as performance characteristics while investigating these parameters. A central composite rotatable design was used in the experiment (CCRD). The results of the experiments revealed that the speed of threshing and the number of beater pegs had significant positive effects on threshing efficiency, whereas the millet panicle had significant negative effects. The speed of threshing and the number of beater pegs had considerable positive effects on threshing efficiency, whereas the millet panicle had large negative effects, according to the results of the studies. Also, a combination of a speed of 1590 rpm, 28 beater pegs, and a millet panicle moisture of 15% resulted in the maximum cleaning efficiency of 98.31%. The cleaning speed had a positive substantial effect on the cleaning efficiency, although the beater pegs and moisture content had small effects. The optimum speed of 1730 rpm, number of pegs of 35, and millet moisture content of 13.5 percent for threshing efficiency of 91.41 percent, cleaning efficiency of 97.87, and desirability of 0.997 were achieved using numerical optimization. The study's findings include standard input machines and processing variables that produce the best machine output.

The Effects of Some Mechanical Parameters of a Developed Millet Thresher on Millet Threshing and Cleaning Efficiencies

Some mechanical and process parameters of a developed millet thresher have been optimized using a numerical optimization technique. The machine threshes millet panicles and cleans the grains from the straw. The speed of threshing and the number of pegs attached to the threshing drum were mechanical parameters investigated, while the moisture content was the process parameter under investigation. Threshing efficiency, cleaning efficiency, and percentage losses were used as performance characteristics while investigating these parameters. A central composite rotatable design was used in the experiment (CCRD). The results of the experiments revealed that the speed of threshing and the number of beater pegs had significant positive effects on threshing efficiency, whereas the millet panicle had significant negative effects. The speed of threshing and the number of beater pegs had considerable positive effects on threshing efficiency, whereas the millet panicle had large negative effects, according to the results of the studies. Also, a combination of a speed of 1590 rpm, 28 beater pegs, and a millet panicle moisture of 15% resulted in the maximum cleaning efficiency of 98.31%. The cleaning speed had a positive substantial effect on the cleaning efficiency, although the beater pegs and moisture content had small effects. The optimum speed of 1730 rpm, number of pegs of 35, and millet moisture content of 13.5 percent for threshing efficiency of 91.41 percent, cleaning efficiency of 97.87, and desirability of 0.997 were achieved using numerical optimization. The study’s findings include standard input machines and processing variables that produce the best machine output.

Field Capacity and Efficiency of a Turmeric Rhizome Planter in Response to Machine Speeds and Some Selected Crop Parameters

This study present variation in field capacity and efficiency of a turmeric rhizome planter in response to the machine speed and some selected turmeric parameters (dimension); turmeric rhizome length and diameter. This was done with a view to ascertaining the best condition under which the planter could perform optimally. The land area covered in a specific duration by the planter depends largely on the field capacity. The turmeric rhizome planter consists of trapezoidal hopper, grooved cylindrical metering devise, ground wheels made of mild steel, chain/sprocket drive system, three linkage point and frame. The experiment was randomized in a factorial design of three levels of rhizome lengths of 30, 45 and 60 mm, diameter of 25, 30 and 35 mm and operational speeds of 8, 10, and 12 kmh-1. The result of the study shows that increase in planter operational speed resulted in an increase in field capacity and efficiency of the planter, and had a significant effect on them. The turmeric rhizome lengths and diameter were found to have insignificant effects on the field capacity and efficiency of the planter.