Srinivasa Reddy Vempada
@griet.ac.in
Professor of Civil Engineering
GRIET
RESEARCH INTERESTS
concrete technology, structural engineering
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
M. Naveen, K. Hemalatha, and V. Srinivasa Reddy
Springer Nature Singapore
Mohammed Yasir Hussain, K. Hemalatha, and V. Srinivasa Reddy
Springer Nature Singapore
Kotte Sai Krishna, K. Hemalatha, and V. Srinivasa Reddy
Springer Nature Singapore
Mandala Naveen, K. Hemalatha, V. Srinivasa Reddy, and G. Jyothi Kumari
AIP Publishing
Mohammed Yasir Hussain, K. Hemalatha, V. Srinivasa Reddy, P. S. R. P. S. S. S. Vardhani, and A. Rama Krishna Rao
AIP Publishing
V. Srinivasa Reddy, Madhikuntla Shireesha, M. V. Seshagiri Rao, B. Narendra Kumar, and S. Shrihari
AIP Publishing
Kotte Sai Krishna, K. Hemalatha, V. Srinivasa Reddy, and E. Giri Prasad Goud
AIP Publishing
Jadav Pavan Kalyan, V. Srinivasa Reddy, M. V. Seshagiri Rao, B. Narendra Kumar, and S. Shrihari
AIP Publishing
K. Hemalatha, V. Srinivasa Reddy, J. Ajay, and C. Rajasekhar
AIP Publishing
Chiluka Rahul, Polisetty Saahas, V. Srinivasa Reddy, G. Jyothi Kumari Alawadi, and Ahmed Hussien Raide
EDP Sciences
Pile foundations are used to support both vertical and horizontal loads in many geotechnical projects, such as coastal and offshore engineering. In this project, the Finite Difference Method is proposed to solve the differential equation governing the lateral and axial pile response. Initially, the behaviour of the pile subjected to lateral load will be analysed. The effect of various parameters like pile head fixity, the cohesion of surrounding soil, pile diameter, and length of the pile on lateral pile response will be analysed. Finally with these conditions, the deflections profile of the pile subjected to both lateral and axial load is investigated. By using python code we can easily find out the increase in diameter of pile, cohesion of surrounding soil effect on pile head and effect of increase in combined load will be studied. The above stated parameters will be studied for combined loading also under the free and fixed head conditions.
Challa Madhavi, V. Srinivasa Reddy, M.V. Seshagiri Rao, S. Shrihari, Sokaina Issa Kadhim, and Sonal Sharma
EDP Sciences
Concrete’s thermal properties are more complex than for most materials because not only is the concrete a composite material whose constituents have different properties, but its properties also depend on moisture and porosity. Exposure of concrete to elevated temperature affects its mechanical and physical properties. In the current study, M40 and M80 grades of plain self-compacting concrete (SCC) mixes are developed using Nan Su mix design principles to investigate the effect of elevated temperatures on 1) weight and compressive strength 2) compressive strength of SCC when tested cool and hot 3) effect of 2, 4 and 6 hrs. exposure duration of elevated temperatures on compressive strength 4) modulus of elasticity 5) size of testing specimen and 5) effect of thermal cycles on SCC mixes. Results derived the following conclusions 1) the M80 specimens lose more strength than M40 SCC specimens when subjected to elevated temperatures ;2) specimens heated and then permitted to cool before testing lose more strength than those tested while hot; 3) the longer the duration of heating before testing, the larger the loss in strength; 4) The decrease in modulus of elasticity caused by elevated-temperature exposure is more pronounced than the decrease in compressive strength. 5) Small test specimens generally incur greater strength losses than larger ones and 6) Specimens subjected to several cycles of heating and cooling lose more strength than those not subjected to thermal cycling.
A. Rama Krishna Rao, N. Ruben, V. Srinivasa Reddy, Y. Rama Gnanendra Sai, M.V. Seshagiri Rao, Sokaina Issa Kadhim, and Meera Sharma
EDP Sciences
An experimental study was conducted to investigate the effectiveness of transverse reinforcing bars of self-compacting concrete mix (PSCC) and hybrid glass fiber reinforced self-compacting concrete mix (HFRSCC) grade M 40 under monotonically increasing axial compression. was performed for cylinders enclosed in . The behavior of SCC cylinders surrounded by a circular ring and having different volume ratios and clearances was compared under axial compression. In this work, we present a mathematical model developed to predict the stress-strain behavior of SCC and FRSCC under constrained and unconstrained conditions and validate the model using experimental results. To develop SCC, Nan Su blending method based on filling rate 1.12 and 1.14, S/A ratio 0.50 and 0.57 is applied. The steel and glass fiber usage in the hybrid fiber reinforced SCC mixture is assumed to be 1% and 0.05% of the concrete volume respectively. M 40 grade plain self-compacting concrete mixes (PSCC) and hybrid glass/steel fiber reinforced self-compacting concrete mixes (HFRSCC) constrained to different volume ratios, stresses, strains, elastic moduli, plasticity ratios, ductility ratios, and unlimited strength ratios ) has been evaluated experimentally. The following conclusions can be drawn from the stress-strain diagram: 1) Maximum load-bearing capacity and strain at peak stress are higher for his HFRSCC than for PSCC. 2) The presence of steel and fiberglass increases the strength bearing capacity and allows it to withstand greater loads at peak loads. 3) If the containment is in the form of a lateral ring boundary, the effect of fibers is almost negligible. This clearly shows that HFRSCC has a stronger containment effect compared to his PSCC. The strength confinement factor is lower for HFRSCC, suggesting that HFRSCC offers a superior confinement factor compared with his PSCC.
V. Srinivasa Reddy, G. Santhosh, M. Sai Neeraj, E. Manish Goud, C. Rajashekar, Sokaina Issa Kadhim, and Saurabh Dhyani
EDP Sciences
In this paper, it is proposed to study the static flexural performance of hybrid (glass and steel) fiber reinforced M30 grade self-compacting concrete (SCC) beams made with glass fiber reinforcement polymer (GFRP) re-bars. Nan Su mix design approach is adopted to develop the M30 grade plain SCC (PSCC) mixes. Glass fibre SCC (GFRSCC), steel fibre SCC (GFRSCC) and hybrid fibre SCC (HFRSCC) mixes are prepared using the optimum dosages of glass (0.05%) and steel fibres (1%) by volume fraction. HFRSCC reinforced beams of size 1200 *200*150 mm will be casted with steel and GFRB rebars and tested to study the flexural properties such as ultimate flexural strength, load at first crack, deflection at the center, crack width and crack patterns. For the above fibred beams, load-deflection relations will be established. The HFRSCC beam made with GFRP rebars have the load carrying capacity 37.03% more than HFRSCC beam made with steel rebars. The deflection for the HFRSCC beam made with GFRP rebars is 61.52% more than beam made with steel rebar HFRSCC beam made with GFRP rebars increases the load at first crack, ultimate flexural strength, and deflection at the centre at failure and the crack width for same HFRSCC beam made with steel rebars
Thota Harshavardhan, V. Srinivasa Reddy, P.S.R.P.S.S.S. Vardhani, S Shrihari, Ahmed Hussien Raide Alawadi, and Sameer Dev Sharma
EDP Sciences
For the purpose of minimising and managing project delays, effective planning and scheduling are essential elements of construction projects. Globalisation has led to an increase in the scale and complexity of construction projects. With the help of project management software, the quantity of paperwork and time required for such initiatives can be reduced. A warning system must be accessible throughout the project to alert the organisation to potential achievements and failures. Today's market offers a variety of computer software applications for project management, including MSP, Primavera P6, and others. Primavera has made it simple to assess the real progress of a construction project to the expected pace of the task. The project management tool Primavera P6 gathers, documents, monitors, regulates, and publishes data on project performance. Planning, allocating, and scheduling resources for a G+4 residential development are all part of this project. This study highlights the value of scheduling and interferes with the software by working on a construction project for a commercial building. This paper effectively demonstrates all the crucial steps, such as generating an EPS, developing a WBS, connecting tasks in accordance with their dependency and resource availability, and determining the Critical Path.
R. Venkata Suraj Reddy, V. Srinivasa Reddy, M.V. Seshagiri Rao, S. Shrihari, Sokaina Issa Kadhim, and Monisha Awasthi
EDP Sciences
This document provides design principles for concrete beams reinforced with glass fiber reinforced polymer (GFRP) bars per the ACI 440.1R-15 regulation. One of the main advantages of using glass fiber reinforced polymer rods instead of traditional steel reinforced rods is their lighter weight and higher corrosion resistance. However, the bending failure mode of FRP reinforced concrete (FRP-RC) beams is brittle rather than ductile because the elasticity of fiber reinforced polymer (FRP) bars is linear until failure and the elongation at break is small. For FRP-RC elements, concrete crushing compression failure, which gives various warnings before failure, is the preferred failure mode. In other words, unlike the usual design practice for reinforced concrete (steel-RC) beams, for FRP-RC beams, an over-reinforced structure is preferable to an under-reinforced structure. In addition, since the FRP RC member has low rigidity of the FRP rod, it bends more and cracks larger than the steel RC member. These factors limit the field of application of FRP. Here is a design example of a rectangular beam with tension reinforcement according to ACI regulations.
Bandi Sri Ram Gopal, V. Srinivasa Reddy, M.V. Seshagri Rao, Thirumala Sujatha, Ahmed Hussien Raide Alawadi, and Tushar Anthwal
EDP Sciences
The paper states the advantages of web-based Primavera P6 for structural planning and scheduling Bridge building framing the problems and difficulties experienced in the construction schedule and resource availability. Only Bridge Design and Plannings taken for the project consideration. After the detail creation of Bill of Quantities of the proposed bridge. Here the Bridge consists of four spans only. Each Span is of 10.4 m length. Bridge is located at Yellareddy Tank Bund Portion, Nizamabad district (Hyderabad-Medak-Bodhan). The Resource Planning is the creation of Organization Breakdown Schedule (OBS) and Enterprise Project Structure (EPS) of the project and also to create Work Breakdown Schedule (WBS) and to insert the corresponding activities and schedule them on the basis of created calendar and need to level/smoothen the resources and make effective use of them. Organization Breakdown Schedule (OBS) and Enterprise Project Structure (EPS) of the project has been created Work Breakdown Schedule (WBS) and the corresponding activities are created and need to schedule their resources to activities on the basis of created calendar and need to level/smoothen the resources. Resource Scheduling involves the Scheduling of Project and Activity Network Diagram. Resource allocation enables you to allocate equipment, labor, and material expenditures to your timetable. The reports in Primavera P6 may be used to track resource allocation and potential over-allocation of labor resources.
Shaik Feroz, P.V.V.S.S.R. Krishna, G.V.V. Satyanarayana, V. Srinivasa Reddy, Ahmed Hussien Raide Alawadi, and Abhishek Kumar Pathak
EDP Sciences
Ferrock is the commercial name given by the Dr Stone working with university of Arizona which holds the patent on this novel material. This is an alternative material developed for structural applications in place of concrete. In this paper, ferrock mortar is prepared with various solids such as iron powder, iron dust, cement and fly ash to establish the optimum combinations of solids for preparing the high strength ferrock systems. Iron dust in the form of powder (size less than 90 microns) and fine aggregate (size between 150 microns to 2.36mm) is used in the study to develop the iron carbonate matrix which is major binding material in ferrock. For the process of iron carbonation, carbon dioxide is prepared from the chemical reaction of sodium bicarbonate and acetic acid. Iron dust cubes are carbonated to form iron carbonation matrix upon fusion. This material has very high strength than the references cement mortar samples.
Kakara S.J. Kumar, M.V. Seshagiri Rao, V. Srinivasa Reddy, S. Shrihari, and Prashant Hugar
EDP Sciences
In the current study, effect of particle size of colloidal nano-silica on the properties of the SCM based concrete is studied. The nano-silica particle sizes adopted for the study are 30nm, 60nm and 90 nm. The M20 grade concrete system is made up of cement (C), fly ash (FA), micro-silica (mS) and nano-silica (nS). Compressive strength test at 60 days and pore structure analysis are carried out for C-FA-mS-nS system. The hydration of Portland cement is significantly influenced by the colloidal nanosilica (CNS) particle size. High doses of nS content boost the pozzolanic reaction and the creation of CSH and CASH gels, but they also have a negative impact on the strength development of the material by increasing microcracking due to the self-desiccation effect. The addition of nanosilica to concrete can significantly enhance its qualities after hardening because it ensures the pozzolanic reaction, the seeding effect, which both increase the degree of hydration, and the filling effect, which can fill the internal porosity defects. The cement-mS system's impermeability was greatly improved by the nS because it improved the microstructure, increased the complexity of the pore structure, and refined the pore structure.
V Saikrishna, V Srinivasa Reddy, M V Seshagiri Rao, and S Shrihari
EDP Sciences
In the current study the moment - curvature behavior of basalt fibred concrete beams made with basalt fibre reinforced polymer bars and normal beams with steel rebars are evaluated. Basalt fibred reinforced concrete beams of M30 grade were casted with steel and BFRP rebars separately to study the flexural properties of basalt fibre and BFRP bars. From the load –deflection plots, flexural characteristics such as load at first crack, ultimate flexural strength, deflection at the centre and crack width at failure are evaluated. Deflections were measured at the central point and under the load using the deflection meters. The values of moments and curvatures are obtained. Moment curvature relationships are very important to assess out ductility of the structure and the amount of possible redistribution of stresses. The deformations measured are divided by the gauge length (200mm) to obtain the strains at the particular level. From the top and bottom strains, the average curvatures were calculated. From these results, M-Ф diagrams are plotted.
K Ajay Kumar, A Venkat Sai Krishna, S Shrihari, and V Srinivasa Reddy
EDP Sciences
In the present study, the stress-stain behaviour of confined concrete made with basalt fibre reinforced polymer bars (BFRP) were taken up. The stress-strain behaviour was studied for the concrete mixes confined with steel rebars and BFRP rebars. The confinement was given in the form of steel hoops in the cylinders, 3 hoops (0.8%), 4 hoops (1.1%), 5 hoops (1.3%) and 6 hoops (1.6%). The addition of basalt fibres along with confinement of concrete with steel and BFRP hoops enhanced the compressive strength, indicating further confinement effect in the concrete. It is observed that the addition of fibres is helpful in lower confinements only. Beyond 1.1% confinement, the addition of any type of basalt fibres doesn’t show any effect on compressive strengths. From the stress-strain behaviour of all types of concrete mixes, it is concluded that the ultimate load-carrying capacity and strains at peak stresses are more in concrete with BFRP hoops for mixes up to 1.1% confinement. The addition of basalt fibres to concrete has increased the ductility in both confined and unconfined states
U Prashanth, S Shrihari, V Siva Prasad Raju, and V Srinivasa Reddy
EDP Sciences
The goal of this research is to better understand the stress-strain behaviour of plain and fibre reinforced M30 grade plain SCC mixtures. The experimental stress strain relationship of SCC revealed that all changes had a minor effect on the stress strain curve's first section. The stress-strain behaviour of M30 FRSCC mixtures has improved with the addition of fibres, resulting in lower stress values for the same stresses. At peak loads, all fibre reinforced SCC mixes, notably SFRSCC and HFRSCC mixes, showed an increase in strain values. Steel and hybrid fibres enhanced the post-peak stress-strain behaviour of SCC mixes compared to glass fibered SCC mixes. M30 grades’ modulus of elasticity When compared to other FRSCC mixes, HFRSCC mixes created with optimal combinations of PF and s/a ratios have high values. By dispersing deformation energy through fibres, HFRSCC mixtures have a better capacity to prevent fracture growth. HFRSCC mixtures with high toughness moduli have better shock resistance. Because of the dense and compact microstructure, the modulus of elasticity (E) of HFRSCC mixes shows improved performance.
Nutakki Sai Ketana, V Srinivasa Reddy, M V Seshagiri Rao, and S Shrihari
EDP Sciences
The focus of the study was to identify the stress strain behavior of geo polymer concrete and salient parameters that influence the mixture proportions and the properties of low calcium fly ash- based geo polymers concrete. To develop geopolymer concrete the chemical proportions are alkaline liquid solution/fly-ash ratio=0.5, Sodium silicate/sodium hydroxide ratio=2.5,16M NaOH and SiO2/Na2O ratio=2.0. The geopolymer concrete mixes have shown improved stress values for the same strain levels compared to that of controlled concrete mix. Normalized stress strain curves are used to compare the behaviours of geopolymer concrete. It can be observed that geopolymer concrete has improved strains for the same stress when compared to conventional concrete. Geopolymer concrete mixes have shown improved stress values for the same strain levels compared to that of controlled concrete mixes.
K Saiteja Chary, S Shrihari, V Siva Prasad Raju, and V Srinivasa Reddy
EDP Sciences
This work presents the effect of Ground granulated blast furnace slag (GGBS), fly ash (FA) and metakaolin (MK) on the strength properties of geopolymer concrete (GPC). Geopolymer concrete made with FA produces calcium aluminosilicate hydrate (C-A-S-H) product due to presence of alumina and sodium aluminosilicate hydrate (N-A-S-H) gel as main reaction product of polymerization. Geopolymer concrete made with FA and GGBS, calcium silicate hydrate (C-S-H) also gets produced additionally with calcium aluminosilicate hydrate (C-A-S-H) gel and sodium aluminosilicate hydrate (N-A-S-H) gel due to presence of high content of CaO in GGBS. This additional product imparts more strength performance in GPC. In geopolymer concrete made with FA and MK, the more amount of calcium aluminosilicate hydrate (C-A-S-H) is produced due to presence of high amount of alumina in metakaolin along with sodium aluminosilicate hydrates (N-A-S-H) giving more strength to GPC. Metakaolin is recommended to be used for the development of GPC because it has high amount of alumina.
Gorla Jayasri, V Siva Prasad Raju, V Srinivasa Reddy, and M Mounika
EDP Sciences
In the present study, the stress-stain behaviour of self-compacting concrete (SCC) and fibre reinforced self-compacting concrete (FRSCC) were taken up. The stress-strain behaviour was studied for the SCC and FRSCC mixes in unconfined and confined states. The confinement was given in the form of steel hoops in the cylinders, 3 hoops (0.8%), 4 hoops (1.1%), 5 hoops (1.3%) and 6 hoops (1.6%). The addition of fibres along with confinement of FRSCC with steel hoops enhanced the compressive strength, indicating further confinement effect in the FRSCC. It is observed that the addition of fibres is helpful in lower confinements only. Beyond 1.1% confinement, the addition of any type of fibres doesn’t show any effect on compressive strengths. From the stress-strain behaviour of all types of FRSCC, it is concluded that the ultimate load-carrying capacity and strains at peak stresses are more in SFRSCC and HFRSCC for mixes up to 1.1% confinement. The addition of fibres to SCC has increased the ductility in both confined and unconfined states
S V S Sankeerth, V Srinivasa Reddy, S Shrihari, and C Rajashekar
EDP Sciences
This paper presents the effect of packing factor and fine aggregate/total aggregate ratio on the performance of the self-compacting concrete (SCC). A higher PF value would imply a greater amount of the coarse and fine aggregates used, thus, decreasing the content of binders in SCC. In this paper M30 grade plain SCC mixes are developed with the different combinations of packing factors (PF) (varying from1.12 to 1.18) and fine to total aggregate ratios (s/a) (0.50 to 0.57) and found that the PF & s/a combinations of 1.12 & 0.53 and 1.14 & 0.57 are found to be optimum as these combinations gave maximum compressive strengths which can be attributed to high achievement of particle packing densities in SCC mixes. As PF increases powder content decreases and aggregate content increases requiring more paste to make the SCC mix workable. Less value PF will have high particle packing density yielding more strength due to improved microstructure of SCC mixes. At PF & s/a combinations of 1.12 & 0.53 and 1.14 & 0.57, the workability of SCC mixes is superior because of high paste volume and less aggregate content.