Issue 3: Sep.-Dec. 2021

Vinay Kumar Singh, Puja Rav

Abstract: The culvert played an important role in the transportation system by allow the crossing of the barrier from one side to the other under the railways and roads. A three-dimension double cell RCC box culvert has been designed to complex nature of the box culvert and analysis of box culvert has been done for self-weight of box culvert (dead load) as well as live load (IRC Class 70R load) for maximum eccentricity at the mid span along with zero eccentricity. This paper shows design and analysis of double cell RCC box culvert by numerical modelling (MIDAS Gen and STAAD Pro V8i) using IRC code. The top, bottom and side wall were analyzed to maximum bending moment as well as shear force due to the dead load, live load as well as live load surcharge. Its design and analysis is based upon the finite element analysis.The results obtained from STAAD Pro V8i software is compared with MIDAS Gen software. The structural elements of RCC Box Culvert are designed to resist the bending moment and shear force values. It is concluded that using of MIDAS Gen and STAAD Pro V8i software gives best and accurate result in a very short time. As a result, design and analysis of double cell RCC box culvert was concluded and find with the reduction in the size of proposed RCC box culvert, the self weight of the RCC box culvert is significantly reduced. This paper is provided full discussion on provision in IRC code and consideration.

International Journal of Bridge Engineering, Vol. 9, No. 3, 2021: pp. 1-12

Milad Bahrami, Michel Guillot

Abstract: In this study, the comparison of the first pass of the V groove bevel joint with 45 degree angle, root pass 2 mm and different root gap has been compared for automatic robotic gas metal arc welding (GMAW) of Aluminum 6061-T6 and optimized welding parameters such as voltage, wire feed speed, travel speed and distance of the gun to weld for the best weld of 6.35 mm, 12.7 mm, 19.05 mm and 25.4 mm were found. Taguchi technique based Orthogonal Array is used for Design of Experiments (DOE) and artificial neural network (ANN) modeling is utilized to predict the penetration, distortion and quality of the weld, as well as ultimate tensile strength (UTS) has been measured for 6.35 mm thickness. Finally, the ideal range of process parameters such as voltage, wire feed speed, distance between nozzle to work piece and travel speed have been identified.

International Journal of Bridge Engineering, Vol. 9, No. 3, 2021: pp. 13-30

Vijay Shende, Girish Mehta, Pramod Belkhode, Sagar Shelare, Kalpana Lokhande, J.P. Modak, Ayaz Afsar

Abstract: The energy crisis is a prominent issue faced by today's world. The natural recourses are depleting faster, and many few repositories of natural resources are available by which one could fulfill the future demand of energy. People are on the prowl of finding new repositories of natural resources, but this also has limitations. Therefore, recent research has taken a keen interest in renewable energy sources. There are good renewable energy sources presently available; among them, human power seems to be an eco-friendly and cheaper energy source that is universally available. Human power can be stored in a Flywheel, and it could be used as a motor for driving machines and mechanisms. Several applications have been tried considering HPFM as an energy source. Through this paper, a concrete mixer energized by HPFM is presented. The main focus is given on its design and dynamics, along with its performance analysis.

International Journal of Bridge Engineering, Vol. 9, No. 3, 2021: pp. 31-50

Saman Mansouri

Abstract: In this paper, the strategies for seismic retrofit of the bridge located on Dogaz's highway interchange with the Tehran-Karaj freeway have been discussed. The conventional neoprene has been used between decks with abutments and cap beams of this bridge. Since the neoprene bearings do not have the high capacity of energy dissipation due to the earthquake, therefore, to this end, appropriate strategies for seismic retrofitting the bridge should be adopted. The method of the study is, first, the alternative effects of elastomeric bearings (the second model), lead rubber bearing (the third model) and friction pendulum bearing (the forth model) instead of neoprene have been evaluated and compared in three separate models and then when the deck with rigid connection is on the cap beams and abutments (the first model) have been evaluated in another model. The results of the Eigen vector analysis indicates that model the use of elastomeric bearings (EB), lead rubber bearing (LRB) and friction pendulum bearing (FPB) makes the most of the energy caused by vibration dissipate in modes where the structures have simple deformation compared with first model and also using the discussed seismic bearing makes to prevent the complicated warping of the bridges slightly than the first model. The results of non-linear time history analysis indicates that the displacement of deck, cap beams and abutment is equal in the first model and its value is very low and this seismic behavior makes considerable increase of shear base force in integrated bridge in comparison with isolated ones. While enjoying discussed seismic bearings make deck slide on seismic bearings under the effect of earthquake that this seismic behavior leads to increase the absorption and dissipation of energy in the isolated structure than integrated structure.

International Journal of Bridge Engineering, Vol. 9, No. 3, 2021: pp. 51-84