MIT-World Peace University (MIT-WPU) is a top educational institute located in Pune, India. It is recognized within&nbsp;UGC under Government of Maharashtra Act No. XXXV 2017.&nbsp;

It is part of the MIT group of institutions (established in 1983) which covers 10+ campuses across India and has more than 50,000+ students enrolled across various disciplines at a given point of time. The institute houses 15 schools ranging from Engineering &amp; Technology, Design, Pharmacy, Commerce, Governance among others. It offers undergraduate, postgraduate and PhD programs among different disciplines.&nbsp;

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MIT World Peace University

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School of Civil Engineering

Engineering and Technology

Lecture Notes in Civil Engineering

An Experimental Study on Flexural Strength of Corroded-Reinforced Concrete Beam with Fly Ash

Pune metro network is one of the major national projects in India. It aimed at developing an elevated andunderground transportation system to solve the severe traffic problems in Pune. The underground line includes 5 undergroundstations which are Shivajinagar, Civil court, Budhwar Peth, Mandai, Swargate and tunnels. The tunnel for Pune Metro Line 2 has acircular cross section of 5.8m internal diameter that consists of a precast segmental lining thickness of 0.275m. This reportpresents a parametric study on the effects of seismic waves on the tunnel structure through numerical modelling employing thefinite – element analysis. Full dynamic analyses were performed employing earthquake motion of maximum magnitude earthquakein Maharashtra which is Koyna earthquake in 1967 of 6.5 magnitude. The analysis of soil-structure interaction was done using thecommercial software Rocscience-RS2. The results proved that the 275 mm thick circular cross section can safely sustain theexpected static, dynamic and seismic stresses. This research work focuses on the behavior of Segmental lining used for the Punemetro tunnel under seismic loading. Detailed behavior of Pune metro tunnel, designing of Metro tunnel along with seismic loadingand its behavior have been studied. Finite element modelling by using software RS2 has been done for 6 cases.

International Research Journal of Engineering and Technology (IRJET)

Seismic Analysis and Design of Pune Metro Tunnel

Beam-column joint plays an important role in the response of a steel moment resisting framed structure.Generally, beam-column joint is the portion of the column that is common at the intersection to both the column and beam.Because of the poor performance of pre-Northridge moment connections, the researchers investigated the causes of failureand developed alternative connections for repair, rehabilitation and new construction. In this study, the behaviour of beamcolumnjoint with different modes of connections studied analytically using finite element analysis and experimentally usingloading frame with respect to ductility and plastic hinge formation. Four types of connections i.e. connection using weld, usingstiffeners like cleat angle and plate, using haunches and by using combination of both stiffeners and haunches were used withstandard ISMB steel section, plate forming I section and moreover with tube section. Modelling of the beam-column joint withdifferent connections were done in finite element software named ANSYS – WORKBENCH 2019. The aim of this study is towork out the best behaviour of connections. Experimentally total six specimens with and without stiffening are prepared fortesting. Quasi static test performed on the beam column joint using loading frame. Experimental work is validated withanalytical results obtained by FE analysis.

COMPARATIVE STUDY OF BEHAVIOUR OF STEEL BEAM-COLUMN JOINT WITH DIFFERENT MODES OF CONNECTIONS

Modern infrastructure activities are not possible without the use of reinforced concrete and thus the strength anddurability of these structures is important. Corrosion of reinforcing steel is been cited as the most detrimental effect and is thusendangering the structural performance in terms of load bearing capacity and durability. The corrosion affects the service life ofstructure. The bond between reinforcement and concrete is affected due to corrosion and thus the strength of RCC alsodeteriorates. Corrosion of reinforced concrete is a slow process. The concrete acts as a protective shield thus, it takes reasonablylong time for corrosion initiation and progress. The accelerated corrosion technique is a method to assess causes and extent ofcorrosion. The diffusion of chlorides in concrete is recognized as one of the major cause for initiation of corrosion phenomenon.This report presents study on effect of corrosion on compressive strength, flexural strength and torsional strength of reinforcedconcrete beams. In this experiment M25 grade of concrete is used for casting of RC beams. Universal testing machine (UTM) is usedfor compressive strength test and flexural strength test and specially prepared setup is used for torsional strength.

EFFECT ON ENERGY ABSORPTION IN TORSIONAL AND FLEXURAL MEMBER DUE TO CORROSION

In the development of infrastructure concreteplays a vital role, it is widely used as a building material.Concrete is a mixture of cement, water, coarse aggregate andfine aggregate. Over the last few years, the environment isgreatly affected due to the amount of energy consumed andCO₂ emitted during production of cement, these environmentaland economical issues related to materials production and usehave stimulated interest in the development of alternativematerials which would partially replace cement and improvethe performance of concrete. The materials which can used forpartial replacement could be naturally occurring, industrialwastes or by-products that are less energy intensive. Thesepozzolanic materials when combined with calcium hydroxide,exhibits cementetious properties. This work focuses oninvestigation of durability characteristics of M30 gradeconcrete with partial replacement of cement with groundgranulated blast slag (GGBS) by 20%, 40%, 60% and alccofineby 10%, 12%, 14%. The cubes and cylinders are tested forcompressive strength, water permeability and rapid chloridepenetration test.

INVESTIGATION OF DURABILITY OF CONCRETE BY INCORPORATING GGBS AND ALCCOFINE

Corrosion effect on reinforced concrete is one of major issue in construction industry. Reinforced concrete is widely used in construction industry due to its extensive accessibility. The outcome of steel corrosion includes damages cross section of steel area, cracks in concrete due to increasing expansive pressure, In coastal region due to effect of chloride deterioration of steel is cause which resulting into reinforcement corrosion which affects service and life of RCC structure. The bond strength between the steel reinforcing bar and concrete is thus reduced and the strength of the structure deteriorates. The objective of this study is to investigate the effect of corrosion on torsional strength, shear strength and flexural strength of reinforced concrete beams. We used accelerated corrosion technique to induced corrosion on reinforced concrete experimentally in laboratory. Using M20 grade with ordinary Portland cement, beam specimens are casted. Universal testing machine (UTM) is used flexural and shear strength and load and deflection behavior is analyzed. Specially prepared setup is used for torsional strength.

International journal of Engineering Research and Technology (IJERT)

Experimental investigation of effect of corrosion on reinforced concrete beam

International Journal of Emerging Technologies and Innovative Research

Design of Post Installed chemical anchorage for Concrete – Steel connection

Post installed rebar connections are being widely used in practice. The technology of post-installed reinforcing bars isgaining importance since these bars are being frequently used in horizontal, vertical, and overhead applications in retrofit andrehabilitation of structures. Systems for installation of post- installed reinforced bars using injectable adhesive are in used in concretestructure. This paper briefly discusses about post-installed rebar connections, its failure modes, Eurocode approach to design, postinstalledreinforcement approval and static effect of rebaring on concrete structure

Journal of Emerging Technologies and Innovative Research (JETIR)

An Overview and Analysis of Post Installed Rebar Connection on Concrete Structure

With increase in demand of construction industry, man has developed various techniques of construction. Post-installed connection is one of the techniques which allows to extend or strengthen the structure without affecting the existing structure. The technology of post-installed reinforcing bars is gaining importance since these bars are being frequently used in horizontal, vertical, and overhead applications in retrofit and rehabilitation of structures. Design of post-installed rebar connection is an issue as proper design guidelines are not yet provided in IS codes. Proper design of anchorage length is important parameter in post-installed connection. Post installed rebar connections, Eurocode approach to design, post-installed reinforcement approval and design method for static loads are discussed. The main aim of the study is to design post-installed rebar connections for existing structure. We have also carried out analytical investigation using finite element method to check the effect of post-installed connections by varying anchorage length as 10d, 15d, 20d and compared the effect with actual designed anchorage length for static loads. Behavior of structure after post-installed connection under static loading is studied. © 2019 IJSTR.

International Journal of Scientific and Technology Research

Effect of post-installed rebar connection on concrete structure

Design of Post-installed chemical anchors can be designed by referring European Guidelines. Evaluation of Service Report is done by ETA 16/0143. Design method is as per given in ETAG BOND (EOTA TR 029). Design and analysis of Chemical anchors are carried out by structural engineers. Newly developed Component Based Finite Element Analysis (CBFEM) method is used for determining the Anchor forces for Non Rigid Base plate. Rigid Base-plate assumption and non-rigid baseplate CBFEM methods are used for Anchor Calculation. Differences between results of these two methods are observed. Chemical Anchors are used for the study. Design is done on the Profis Engineering Software. © 2019 IJSTR.

Anchor forces under CBFEM and rigid base plate assumption methods

In this modern age, civil engineering constructions have their own structural and durabilityrequirements. Fiber Reinforced Concrete (FRC) is a composite material made primarily from hydrauliccements, aggregates and discrete reinforcing fibers. Fiber incorporation in concrete, mortar and cement pasteenhances many of the engineering properties of these materials such as fracture toughness, flexural strength,resistance to fatigue, impact, thermal shock and spalling.The FRC is a composite material made of cement, fineand coarse aggregates and discontinuous discrete steel fibers. Recently developed an analytical model topredict the shear, tensional strength and bending torsion behavior of fiber reinforced concrete beam withexperimental substantiation. However, very little work has been reported in combined torsion and shear.Similarly to beam with conversional reinforcement, the presence of shear may significance influence ontensional strength of fiber concrete beams. Present paper investigates the mechanical properties like as shearstrength, and torsion strength of concrete with different types of steel fiber with constant volume fractions anddifferent aspect ratio.A primary finding emerging from the experimental program was that the placement offibers, increased load carrying capacity of high strength fiber reinforced concrete [HSFRC] beam. Ductility,toughness significantly improved

Journal of Structural Engineering, International Institute of Information Technology, JoSE-CSIR-SERC, Hyderabad, India.

Experimental Study of Steel Fiber Pre-stressed Concrete Beam for Shear, Bending and Torsion

In this modern age, civil engineering constructions have their own structural and durabilityrequirements. Fiber Reinforced Concrete (FRC) is a composite material made primarily from hydrauliccements, aggregates and discrete reinforcing fibers. Fiber incorporation in concrete, mortar and cement pasteenhances many of the engineering properties of these materials such as fracture toughness, flexural strength,resistance to fatigue, impact, thermal shock and spalling.The FRC is a composite material made of cement, fineand coarse aggregates and discontinuous discrete steel fibers. Recently developed an analytical model topredict the shear, tensional strength and bending torsion behavior of fiber reinforced concrete beam withexperimental substantiation. However, very little work has been reported in combined torsion and shear.Similarly to beam with conversional reinforcement, the presence of shear may significance influence ontensional strength of fiber concrete beams. Present paper investigates the mechanical properties like as shearstrength, and torsion strength of concrete with different types of steel fiber with constant volume fractions anddifferent aspect ratio.A primary finding emerging from the experimental program was that the placement offibers, increased load carrying capacity of high strength fiber reinforced concrete [HSFRC] beam. Ductility,toughness significantly improved.

Experimental Study of Steel Fiber Concrete Beams for Shear, Bending and Torsion

The present study aims at improving the shear and flexural strength of the concrete bythe addition of steel fibres. Also the study investigates the effect of prestressing on the shear andflexural strength of concrete. In this research work, 20% of fly ash (class-C) is added as a replacementof binder to its weight and 1.5% steel fibres by weight of concrete. Based on the experimentalresults, it can be seen that the load carrying capacity of steel fibre increased by 30–50% than theplain beam for non-prestressed. And load carrying capacity is increased approximately by 30–90% than the plain prestressed concrete beam. The use of steel fibres in a concrete mix was foundto increase the crack resistance of the beams. Crack width was not more than 6 mm and 3 mm incase of the non-prestressed and prestressed steel fibre reinforced concrete beams respectively.Hence, based on experimental results it can be concluded that prestressed steel fibre reinforced concretebeams help to improve the shear strength, flexural strength, and crack resistance

Fulltext

Engineering Sciences-Journal of King Saud University, Elsevier Publication

Shear and Flexural Behavior of Pre-stressed and Non-Pre stressed Plain and SFRC Concrete Beams

The use of steel fibres in plain concrete helps in improving the mechanical properties of concrete structure. Thus the aim of present study is to investigate the effect of steel fibres on torsional strength improvement of concrete. The research evaluates the torsional strength and combined torsional-shear-bending strength. In this study, 20% of fly ash (class-C) is added as a replacement of binder to its weight and 1.5% steel fibres by weight of concrete. Experimental results show an improvement in torsional strength, combined torsional-shear-bending strength and crack resistance of concrete by addition of steel fibres in the concrete and a decrease in the deflection. Based on the experimental results the modified coefficient of the empirical formulae has been suggested to predict the torsional strength and torsional stress of steel fibre reinforced concrete.