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Friday, November 6, 2020 | History

3 edition of Centrifugal modeling of underground structures subjected to blast loading found in the catalog.

Centrifugal modeling of underground structures subjected to blast loading

  • 166 Want to read
  • 6 Currently reading

Published .
Written in English

    Subjects:
  • Underground construction -- Testing.,
  • Military engineering.

  • Edition Notes

    Statementby Habibollah Tabatabai.
    The Physical Object
    Paginationviii, 312 leaves :
    Number of Pages312
    ID Numbers
    Open LibraryOL23685759M
    OCLC/WorldCa17416937

    J. t and N. M. New mark studied The Design of Underground Structures to Resist Nuclear Blast. In this project the experimental results from explosion a set of recommendations for the design of underground structures was prepared. Einar Broch, Muir Wood Lecture , Tunnels and Underground Works For Hydropower. Dynamic Analysis of Subway Structures under Blast Loading Huabei Liu Assistant Professor, Department of Civil Engineering, City College of New York/CUNY Convent Ave. ST , New York, NY , USA Email: [email protected] Abstract: Public transit system has become one of the targets of terrorist attacks using explosives, examples of. The system uses impact loading to produce a 2 ms pulse with a typical peak pressure loading of 35 MPa and an impulse of 14 kPa-s over the surface of the column. The system allows observation of the test in person and by high-speed video, as well as successful instrumentation of the by:   When the shock wave caused by explosion in geotechnical medium encountered buried pipeline, the buried pipeline may be destroyed. Use the LS-DYNA program to describe the deformation of buried pipelines under explosion ground shock. The results indicate that the process of the stress on pipe is instantaneous, and the back of buried pipelines against explosion center suffers greater Cited by: 3.


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Centrifugal modeling of underground structures subjected to blast loading by Habibollah Tabatabai Download PDF EPUB FB2

A series of tests at high-gravity and low-gravity environments were performed on 1/60 and 1/scale models of an underground protective structure subjected to a scaled blast loading. Centrifugal Modeling of Underground Structures Subjected to Blast Loading [Tabatabai, Habibollah] on *FREE* shipping on qualifying offers.

Centrifugal Modeling of Underground Structures Subjected to Blast LoadingAuthor: Habibollah Tabatabai. " Centrifugal Modeling of the Effects of Blast Loading on Tunnels ", Addendum to the Proceedings of 2nd Symposium on the Interaction of Non-Nuclear Munitions with Structures, U.S.

Air Force. The tests were carried out with a centrifugal acceleration of 50 g to simulate the effect of blast loading from kg trinitrotoluene (TNT) inside a transit tunnel of 5-m diameter.

Exploded bridgewire (EBW) charges were employed as the model explosives, and the model tunnel was simulated by thin-wall aluminum tube.

The response of underground structures subjected Centrifugal modeling of underground structures subjected to blast loading book blast loading is generally discussed in protective Centrifugal modeling of underground structures subjected to blast loading book.

Usually example structures are box shaped concrete structures, partially or fully buried in soil medium. The loading and response of the underground structure involves different mechanisms as compared to the above-ground structures.

In the current technical guide, an overview of a design procedure for structures under blast loading is provided.

The material presented has been collected from various sources and mainly from references []. The analysis focuses on ways to estimate blast loading on structures and, to a lesser extent, on their response under such types of. @article{osti_, title = {Centrifugal and numerical modeling of buried structures.

Volume 3. A centrifuge study of the behavior of buried conduits under airblast loads. Final report}, author = {Whittaker, J.P.}, abstractNote = {The principal object of the research was to provide a better understanding of the behavior of the soil-structure interaction phenomena associated with buried.

RESPONSES OF UNDERGROUND STRUCTURES SUBJECTED TO BLAST LOADING A THESIS IN Civil Engineering Submitted in partial fulfillment of The requirements for the degree of MASTERS OF CIVIL ENGINEERING at The City College of New York of the City University of New York by Soufiane Nezili _____ _____Author: Soufiane Nezilli.

Joint Advanced Materials & Structures Center of Excellence aircraft fuselage, i.e., Airbus A, Boeingand Airbusthere is a need to investigate the structural response of modern composite structures to an IED blast to ensure, at least, the same level of structuralFile Size: 2MB.

In the design of structures to resist the effects of air blast loading or other severe dynamic loads it is vital to have large energy absorbing capabilities, and structural subjected to air blast loading, Proc. of the 8th Int. Symp. on Structures Under Shock and Impact, 53–62, Crete, Greece, Drag exerted by the blast winds required to form the blast wave [11].

These winds push, tumble and tear objects. Blast pressure can create loads on buildings that are many times greater than normal design loads (Fig 3), and blast winds can be much more severe than hurricanes. Buildings with relatively weak curtain walls and interior partitions.

Blast Loading & Its Effect on Structures 1. demonstrated the need for examination of behavior of members subjected to blast loading. • Structures should be protected from the blast effects, which are likely to be the targets of terrorist attacks. Concrete Structures at Chalmers University of Technology.

The work was performed within the research project entitled "Blast and fragment impact: Reinforced and concrete and bre concrete structures".

The research project is a continuation of earlier work on concrete structures subjected to severe dynamic loading conducted at Chalmers by.

Akshaykumar Sanaki, Rakshitha J, Sanket Desai, Post Graduation Student, N. Munirudrappa, Professor, Department of Civil Engineering, Dayananda Sagar College of Engineering, Shavige Malleshwara Hills, Kumarswamy Layout, Bengaluru, India.

The present study aims at providing an overview on the blast loading and blast effects on engineering structures. In the past few years, a structure subjected to blast load gained importance due to accidental events or natural events.

Generally conventional structures are not designed for blast load due to the reason that the magnitude of load caused by blast is huge and, the cost of design and construction is very : Umesh Jamakhandi, S. Vanakudre. The present study treats concrete structures subjected to fragment impacts.

The work presented in this thesis was carried out from February to October at the Department of Structural Engineering and Mechanics, Concrete Structures, Chalmers University of Technology, Sweden. Financial support for this work was provided by.

Numerical study on underground structures subjected to shock loading Hareena Ch.B.V et al., International Journal of Civil and Structural Engineering Volume 5 Issue 2 assembly into regions.

These regions can be used to gain finer control over the meshing process. Impact or blast loading is generally idealized through a load pattern, multiplied by some time varying function. The objective of this paper is to present infor- mation on modelling of airblast loading histories on structures due to unconfined explosions in a math- ematical form readily adaptable to structural re- sponse by: Dynamic soil-structure interaction: centrifugal modeling JEAN H.

PREVOST and ROBERT H. SCANLAN Department of Civil Engineering, Princeton University, Princeton, NJUSA In this paper, the dynamic response of soil-structure interacting systems is studied using the centri- Cited by: The authors, Peter Smith and John Hetherington, are staff members at the Royal Military College of Science in Shrivenham and have been instrumental in establishing an active group comprising lecturing and research staff concerned with the response of structures to blast and ballistic by:   The effects of surface blasts on underground structures were studied through centrifuge model tests.

Centrifuge scaling relationships make it possible to model the effects of large explosions, using a relatively small quantity of explosives under a high by: Abstract - In the past few years, structures subjected to blast load gained importance due to accidental events or natural events.

Generally, conventional structures are not designed for blast load due to the reason that the magnitude of load caused by blast is huge, and. Protective design of concrete buildings under blast loading Mir M.

Ali School ofArchitecture, Structures Division University of Illinois at Urbana-Champaign, USA Abstract Designing buildings to resist failure due to blast loads is an extremely complex procedure. His a process that has been investigated for many years, yet it warrants tluther.

Blast Analysis of Column SB Subjected to kg of TNT Explosion W= kg of TNT, R=6,16m. and Z=0,78 (m/kg1/31/3)) P so=1,54 Mpa P r=9, Mpa t o=0, sec. Blast loading of column SB 0 2 4 6 8 10 0 0, 0,01 Time (sec.) Average pressure (Mpa) Outsidepressure inside pressureFile Size: KB.

This research aims to investigate the dynamic response of box shaped underground structures buried in dry sand. For this purpose, a series of centrifuge tests were carried out under harmonic sinusoidal motions by considering the nonlinear behavior of both structure and surrounding by: 3.

TOWARDS THE MODELLING OF BLAST LOADS ON STRUCTURES. Master of Applied Science Philip Miller Department of Civil Engineering University of Toronto This research examines the physics behind blast waves and their interaction with structures.

A computer program, VecTor-Blast, is developed based on the blast wave characteristics of Size: 5MB. The response of concrete and other structures subjected to blast loading is very different from other dynamic loading events such as earthquake and gust wind loading due to the extreme high pressure and short duration of the application of loading.

This topic will introduce you to the nature of blast loads and how the structural elements such. Modelling of a Reinforced Concrete Panel Subjected to Blast Load by Explicit Non-linear FE Code Ganchai Tanapornraweekit1, Nicholas Haritos2, Priyan Mendis3, Tuan Ngo4 1.

PhD student, Dept of Civil and Environmental Engineering, The University of Melbourne, Parkville, VICAustralia. Email: [email protected] Size: KB. Dynamic response of a space framed structure subjected to blast load Jayashree.S.M International Journal of Civil and Structural Engineering Volume 4 Issue 1 5.

Conclusion This study deals with the theoretical and analytical investigation on dynamic response of File Size: KB. Computational Blast Load Predictions 31 Problem Statement 35 CHAPTER 2: EXPERIMENTAL PROGRAM 37 Instrumentation 41 Charge Data and Blast Chamber Construction 49 Charge and Blast Chamber Description — A1 49 Charge and File Size: 8MB.

@article{osti_, title = {Dynamic soil-structure interaction}, author = {Shin, C.J.}, abstractNote = {Soil-structure interaction under blast loading was investigated both experimentally in a 10 g-ton centrifuge and analytically by finite element simulation. In the centrifuge experiments, circular pipes made of micro-concrete were buried in a dry sand and tested in the centrifuge to.

1 Modelling blast loads on buildings in complex city geometries Alex M. Remennikov 1 and Timothy A. Rose 2 1School of Civil, Mining and Environmental Engineering, Faculty of Engineering, University of Wollongong, Wollongong NSWAustralia Phone: (61 -2)fax: (61 -2)email: [email protected] Blast Design & Analysis.

Using Extreme Loading ® for Structures (ELS) software, structural engineers can design and analyze a structure subjected to blast loads with full 3-D nonlinear dynamic analysis. The results allow users to visualize in 3D how the building or different structural components inside the building will behave under the prescribed conditions.

Modeling Blast Loading on Buried Reinforced Concrete Structures with Zapotec Greg C. Bessette Sandia National Laboratories P.O. Box Albuquerque, NM A coupled Euler-Lagrange solution approach is used to model the response of a buried reinforced concrete structure subjected to a close-in detonation of a high explosive charge.

protective structures. One of the purposes of this project is to study the non-linear response of reinforced concrete structures when subjected to impact and blast loading. The study is conducted at two levels: material level and structural level.

At the material level, the strength enhancement of three material models of LS-DYNA. Model study of a buried arch subjected to dynamic loading Robert Kinley Tener Iowa State University structures subject to nuclear blast loading.

The necessity for a reliable underground structures is feasible (2, l8, 19). Purpose and Scope of Investigation. The existence of various types of joints, one of the typical characteristics of prefabricated lining structures, makes the mechanical performance of shield tunnel linings quite different from that of monolithic linings.

A simplified calculation method for the dynamic elastic-plastic analysis of segment lining subjected to explosive loads is proposed.

The lining is composed of a number of rigid Author: Yang Liu, Mingyang Wang, Derong Wang. Study of Simpli–ed Models of Aircraft Structures Subjected to Generalized Explosive Loading by Jason R.

Florek Dissertation Director: Dr. Haym Benaroya This dissertation develops a simple methodology for estimating the maximum elastic-plastic deformation of thin, rectangular plates due to an exponentially decaying pressure pulse.

The response of concrete structures subjected to blast load can be studied numerically using commercial finite element programs. The complexity of reinforced concrete makes modeling and simulation of large structures time and computer power consuming.

Consequently, The. Public transit systems have become one of the targets of terrorist attacks using explosives, examples of which are the attack on Paris subway and the attack on Moscow subway.

Considering the intense threats of terrorist attacks on subway systems in metropolitan areas, explicit three-dimensional Finite Element method was used to investigate the dynamic response and Cited by:. Please cite this article as: Zakrisson B, Wikman B, Häggblad Hans-Åke. Numerical Simulations of Blast Loads and Structural Deformation from Near-Field Explosions in Air, International Journal of Impact Engineering (), doi: /ng This is a PDF file of an unedited manuscript that has been accepted for publication.Blast loading response of reinforced concrete panels reinforced with externally bonded GFRP laminates A.

Ghani Razaqpur a,*, Ahmed Tolba b, Ettore Contestabile c a Centre for Effective Design of Structures, Department of Civil Engineering, McMaster University, Hamilton, Ont., Canada L8S 4L7 b MTC, Cairo, Egypt c Canadian Explosives Research Laboratory, Ot, Canada.

An explosion is defined as a large-scale, rapid and sudden release of energy. Explosions, such as a bomb explosion within or immediately nearby a building and a gas-chemical explosion, can cause catastrophic damage on the building's frames, collapsing of walls, blowing out of large expanses of windows, and shutting down of critical life-safety by: 4.