International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 08 | Aug 2022
p-ISSN: 2395-0072
www.irjet.net
BLAST ANALYSIS OF RC RETAINING WALL WITH SANDWICH PANEL Husna S.1, Liji A.2 1M.TECH.
(Structural Engineering) Student. Dept. of Civil Engineering, Younus College of Engineering and Technology, Kollam, Kerala, India 2Associate Professor, Dept. Of Civil Engineering, Younus College of Engineering and Technology, Kollam, Kerala, India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract – Blast loads are considerably affect the response of structure. The Retaining walls are the important structures that are used for various civilian and military applications. The blast action on retaining walls causes damages to property, personnels and adjacent structures. For the purpose reinforced concrete Retaining wall is modelled using CREO parametric software and imported to ANSYS 16.0 software to prefer Explicit analysis. Most common cantilever Retaining wall is choosed for the analysis. The construction of Retaining wall is changed from conventional method to advanced Sandwich method. Corrugated Kevlar is the material used for Sandwiching. A comparison of Normal Retaining wall and Sandwich Retaining wall is performed by Explicit analysis under low intensity blast of 1kg and high intensity blast of 1500kg TNT.
Fig -1: Model of Normal Retaining wall with Dimensions in mm
Key Words: Sandwich technique, Explicit Analysis, Normal Retaining wall, Sandwich Retaining wall, Kevlar, TNT Blast
1. INTRODUCTION Protection of civilian structures from the threat of terrorist activities is one among the foremost essential challenges for structural engineers currently. Reinforced concrete are used currently for residential, industrial and mass structures. The mass structures includes Retaining wall, dams, water tanks etc. A Retaining wall is a structure designed to sustain the earth or any other material behind it. Retaining walls are encountered and constructed in various fields of engineering such as dams and water way structures, military fortifications, Railways, Residential areas, Roads, Harbours, Subways, Tunnels, Mines etc. There are different Types of loads were acting on Retaining walls. One of the important load is impact load such as blast loads. The blast behaviour of Retaining wall by using a sandwich material between the retaining wall is necessary to study. In this paper, the Blast analysis of Retaining walls with and without Sandwich panel was performed under TNT blast.
Fig -2: Model of Normal Retaining wall with Dimensions in mm
3. EXPLICIT ANALYSIS Dynamic analysis can be used to find dynamic displacements, time history, and modal analysis. Dynamic loads include people, wind, waves, traffic, earthquakes, and blasts. Dynamic analysis for simple structures can be carried out manually, but for complex structures finite element analysis can be used to calculate the mode shapes and frequencies. In this thesis finite element analysis were done by ANSYS software. For explicit analysis TNT explosive is used. It is a standard high explosive which is chemically safe and easy to cast. TNT mass were set at 1Kg and 1500kg to
2. NUMERICAL MODELLING The modeling and analysis of reinforced concrete Retaining wall is done in this thesis using CREO parametric software and ANSYS 16.0 software. The model is a Retaining wall having 3000mm Height. The blast load (TNT) of 1kg and 1500kg is placed at a standoff distance 1m away from the Retaining wall.
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