Variation of Energy and Principal Stress Components in Underground Structures Due to Seismic Action of Surface Accidental Explosion

Olarewaju, A.J. (2019) Variation of Energy and Principal Stress Components in Underground Structures Due to Seismic Action of Surface Accidental Explosion. International Journal of Advanced Modeling and Analysis in Engineering, 1 (1). pp. 1-6. ISSN 2550-7206

Text IJAMAE-19-01-001.pdf Download (712kB)

Abstract

This study examines the principal stress components and variation of total energy generated in pipes buried loose sand, dense sand and undrained clay in different embedment rations due to seismic action of accidental explosion above the ground surface. In this study, pipes buried in infinite elastic, homogeneous and isotropic soil media was study using ABAQUS numerical code and accidental explosion above the ground surface was assumed to take place far away from the buried pipes. As a result, the material property was assumed to be linear, elastic, homogeneous and isotropic and therefore the two elastic constants as revealed by various researchers and pipe manufacturers were used in the study. Load parameters from accidental explosions above the ground surface but very close to the ground surface were estimated using Unified Facilities Criteria (2008) and pipes were laid horizontally with no joint. The contact between the soil and pipe was defined for ‘no slip’ condition and therefore it is assumed that perfect bond exist between the soil and the pipe. Boundary conditions were defined with respect to global Cartesian axis and time integration technique in ABAQUS/Explicit was used to solve the equation of motion with initial conditions Parameters observed are stress components and variation of total energy generated in pipes buried in different soil media. The increase in total energy and principal stress components at integrated points, from the results, are higher in pipes buried in undrained clay than pipes buried in loose sand and dense sand, indicative of the fact that undrained clay is likely to be problematic with respect to the seismic action of surface accidental explosion.

Item Type:	Article
Uncontrolled Keywords:	Stress, Components, Total, Energy, Explosion, Surface
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) T Technology > TG Bridge engineering
Divisions:	Faculty of Engineering, Science and Mathematics > School of Civil Engineering and the Environment
Depositing User:	Joy Oluwabukola Olayiwola
Date Deposited:	28 May 2021 09:02
Last Modified:	28 May 2021 09:02
URI:	http://eprints.federalpolyilaro.edu.ng/id/eprint/1362

Actions (login required)

View Item