Seismic resistive design for tunnel approach – A case study of Rohtang region
Modernization demands enhanced infrastructural development in every corner of any nation. The integrated road network in the hilly area itself is a big challenge. Construction of tunneling projects tends to increase the road network connectivity in hilly terrain. This improves traffic capacity, which enables frequent mobility of transport systems. A case study of vulnerable tunnel approach passing through tectonically active multi-folded rock mass of young mountains in Rohtang region has been discussed. An estimated 8.8 km long Rohtang tunnel (NATM tunneling) was proposed passing through a diversified geological sequence of uniform dipping rocks having quartzite, quartzitic-schist, and quartz-biotite schist with a thin band of phyllites creating high-stress flow due to overburden. Deep-seated complex failure has been observed at this location. Tunnel squeezing and rock bursting occurred due to explosion, redistribution of elastoplastic pressure during tunneling works. The jointed rock is having an NW-SE joint strike with 220/35° dip direction having three joint sets. In this case study, stability of around 200 m of affected scarp zone has been addressed using the FEM technique. Mohr-coulomb and Generalized Hoek- Brown parameters have been defined for overlying mass and underlying weathered, jointed bedrock strata respectively. Squeezing and exceeding tangential stresses at the periphery of tunnel area as compared to unconfined strength of near lying disturbed rocks resulted in a high concentration of stresses at tunnel approach. Considering all these aspects, micro piles are used at intermediate levels below the road level with pre-stressed cable anchors at the tunnel passage level. Consequently, an increase in strength reduction factor of 98 percent and 80.9 percent has been observed under static and seismic conditions respectively. Control of massive displacement is a major concern for this critical location. FEM analysis shows that stress displacement vectors have been controlled up to 84 percent using stabilization techniques of cable anchors and micro piles.
Published by: Arghadeep Dasgupta
Author: Arghadeep Dasgupta
Paper ID: V7I2-1440
Paper Status: published
Published: April 26, 2021
Universalization of girls’ education– A case study on Keshpur Village of Paschim Medinipur district in West Bengal
Education particularly primary education needs to be stressed and special emphasis must be laid on girl’s education. It was brought out that to realize this goal no effort is being spared. Every care has to be taken to promote universalization of primary education by launching several schemes and programmes like setting of more number of primary schools, appointing more number of teachers, with due emphasis and equity of women teachers maintaining favourable teacher-pupil ratio etc., and programmes like operational blackboard, DEPEP etc., and in addition providing incentive, like free clothing, midday-meal etc., to offset the obstacle of poverty. However, their perception and attitudes with regard to "education", is different from that of the programmes that are being launched. We wish to examine this issue in the present study in the context of artisans (weavers) at a village setting in a chronically drought-prone district of West Bengal.
Published by: Pogati Aswini, P. Premanandam
Author: Pogati Aswini
Paper ID: V7I2-1488
Paper Status: published
Published: April 26, 2021
Billboards prediction using listeners’ perspective and audio features from top music platforms
Musichas been a form of entertainment for many years. The music industry is constantly putting forth the effort to improve the quality of our music. It would be an interesting exercise to predict that the song makes it into top charts from a mathematical perspective. The proposed model in this paper predicts the success of a song based on its audio features and listeners' perspective factors that will be of great help to music producers. Violating the features of the song to predict whether the song will be hit before it is released can greatly help producers to increase their profits and reduce the risks they take inproducing songs. The audio features can be processed using machine learning algorithms like Logistic Regression, Support Vector Machines, Random Forest, Naive Bayes Classifier and patterns may be identified in the processed data, which can finally be combined with listeners' perspective features to effectively predict hit songs.
Published by: Rishikesh Shinde, Abhishek Thorgule, Ashutosh Zaware, Rushikesh Bhujang, Deepali Londhe
Author: Rishikesh Shinde
Paper ID: V7I2-1499
Paper Status: published
Published: April 26, 2021
Peak-to-average power ratio and bit error reduction in OFDM system
Wireless communication is one of the significant features of modern communication systems. In next-generation wireless communication, orthogonal frequency division multiplexing (OFDM) is one of the most commonly used radio access schemes because of its low symbol rate and affinity to different transmission bandwidth arrangements. This system we are currently using as a radio access technique in the latest cellular communication system as long-term evaluation (LTE)in the 3 GPP (3rd Generation Partnership Project) wireless communication. Nevertheless, the peak-to-average power ratio of the OFDM signal is a significant drawback as it restricts the efficiency of the transmitter. high peak-to-average power ratio (PAPR) is the major drawback in the OFDM systems it causes a nonlinear distortion in transmitted OFDM signal when it travels through a nonlinear amplifier. In this paper, we are discussing problems in the OFDM system i.e. Peak to Average Power Ratio also called PAPR. It affects the performance and efficiency of power amplifiers, Different algorithms have been developed to overcome PAPR viz. clipping, SLM (Selective Mapping), PTS (Partial Transmit Sequence), and the overall analysis of different techniques.
Published by: Jyoti Hase, Sunil Gagare
Author: Jyoti Hase
Paper ID: V7I2-1344
Paper Status: published
Published: April 26, 2021
Effects of fly ash on the properties of self-compacting concrete
Worldwide, Concrete is one of the most popular construction materials, because its raw material can be easily available at different places around the world. These facts have not only led to many inventions in the field of concrete but have also led to many studies in order to improve its quality, reducing the cost of implementation, and make the concrete friendly with the environment. The problem with the accepted compaction of concrete and durability are the main subjects under consideration. To achieve both of these skilled labor and advances equipment are required. currently, It seems to be the lack of the numbers of skilled workers for the construction industry is the main reason for a decrease in the quality of construction work. One solution for the achievement of durable concrete structures is the use of self-compacting concrete, which can be compacted into every corner of a formwork, completely by means of its own weight and without the need for vibrating compaction. This means that it can be gained sustainable concrete structures and acceptable compaction by using the minimum number of workers and equipment. Moreover, the use of SCC is also implemented to provide economic, social, and environmental benefits over conventional vibrated concrete construction. Fly ash is the mineral admixtures means pozzolanic material. Pozzolanic materials are siliceous or siliceous and aluminous material, chemically reacts with calcium hydroxide liberated on hydration process at ordinary temperature to form compounds possessing cementitious properties. Fly ash is the most widely used pozzolanic material all over the world. Fly ash is a finely divided residue resulting from the combustion of powdered coal. The new Indian Standard on concrete mix proportions (IS 10262-2009) is already incorporated fly ash as supplementary material to cement, by replacing cement with a material of pozzolanic characteristics such as fly ash. It is used to partially replace Portland cement up to 60% by mass. Fly ash is waste from generated power plants. One of the practical solutions to economize cement is to replace cement with supplementary cementitious materials like fly ash. The use of fly ash as concrete admixtures not only extends technical advantages to the properties of concrete but also contributes to environmental pollution control. India is a resourceful country for fly ash generation with an annual output of over 110 million tonnes, but utilization is still below 20% in spite of the quantum jump in the last 3-4 years.
Published by: Ankit Rameshrao Ghodile, Mayur Banarase
Author: Ankit Rameshrao Ghodile
Paper ID: V7I2-1348
Paper Status: published
Published: April 26, 2021
Modeling, assembly, and static structural analysis of a cotter joint
The objective of this project is the calculation of dimensions, modeling, Assembly, and Static Structural analysis of the cotter joint. A theoretical method is used here to calculate the dimensions. The modeling and Assembly are done in Catia V5R20 and Static Structural analysis in Ansys 2020R1. While doing the static structural analysis more focus is given on generating the most efficient mesh and the comparison of results with respect to four different types of mesh is done. Here the parameters evaluated and compared are Equivalent (Von-Mises) Stress, Shear Stress, and Total Deformation. The analysis of the cotter joint is done for the tensile loading with one end kept as fixed support.
Published by: Ruturaj D. Bhosale
Author: Ruturaj D. Bhosale
Paper ID: V7I2-1409
Paper Status: published
Published: April 26, 2021
