ADVANCED COMPUTATION DYNAMICS SIMULATION OF Advanced Computation Dynamics Simulation of Protective Structures

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  • AFRL-RX-TY-TR-2013-0005

    ADVANCED COMPUTATION DYNAMICS SIMULATION OF PROTECTIVE STRUCTURES RESEARCH

    Daniel G. Brannon and James S. Davidson Department of Civil Engineering Auburn University 238 Harbert Engineering Center Auburn, AL 36849

    For Universal Technology Corporation 1270 North Fairfield Road Dayton, OH 45432-2600

    Contract No. FA8650-07-D-5800-0044 February 2013

    DISTRIBUTION A. Approved for public release; distribution unlimited. 88ABW-2013-2703, 6 June 2013.

    AIR FORCE RESEARCH LABORATORY MATERIALS AND MANUFACTURING DIRECTORATE

     Air Force Materiel Command  United States Air Force  Tyndall Air Force Base, FL 32403-5323

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    01-FEB-2013 Final Technical Report 08-JAN-2009 -- 31-JAN-2013

    Advanced Computation Dynamics Simulation of Protective Structures Research

    FA8650-07-D-5800-0044

    0909999F

    GOVT

    F0

    X00H (QF101007)

    Brannon, Daniel G.; Davidson, James S.

    Conducted by: Auburn University, Department of Civil Engineering, 238 Harbert Engineering Center, Auburn, AL 36849 Conducted for: Universal Technology Corporation, 1270 North Fairfield Road. Dayton, OH 45432-2600

    Air Force Research Laboratory Materials and Manufacturing Directorate Airbase Technologies Division 139 Barnes Drive, Suite 2 Tyndall Air Force Base, FL 32403-5323

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    AFRL-RX-TY-TR-2013-0005

    DISTTRIBUTION A: Approved for public release; distribution unlimited.

    Ref Public Affairs Case # 88ABW-2013-2703, 6 June 2013. Document contains color images.

    This report presents the results of an investigation involving finite element simulation of partially grouted concrete masonry walls subjected to blast loading and the development of an engineering design equation to address the potential for breaching between grouted cells. Tests performed by the Air Force Research Laboratory were used to verify finite element modeling approach. Input parameter studies were carried out to understand the mechanisms and causes of the breaching shear in concrete masonry walls. Based upon the mechanism findings, a design shear equation was formulated, and a maximum pressure for partially grouted construction was defined.

    concrete masonry units, masonry construction, direct shear, partially grouted, finite element modeling, breaching, quasi-static

    U U U UU 95

    Jason P. Lowery

    Reset

  • i DISTRIBUTION STATEMENT A. Approved for public release; distribution unlimited.

    88ABW-2013-2703 6 Jun 2013.

    TABLE OF CONTENTS

    LIST OF FIGURES ....................................................................................................................... iii LIST OF TABLES ...........................................................................................................................v 1. SUMMARY .........................................................................................................................1 2. INTRODUCTION ...............................................................................................................2 2.1. Overview ..............................................................................................................................2 2.2. Objective ..............................................................................................................................2 2.3. Scope and Methodology ......................................................................................................3 2.4. Report Organization .............................................................................................................3 2.5. Literature Overview .............................................................................................................3 2.6. Concrete Masonry Units ......................................................................................................4 2.6.1. Flexural Behavior.................................................................................................................4 2.6.2. Shear Behavior .....................................................................................................................5 2.7. Mortar Properties .................................................................................................................6 2.8. Blast Loading .......................................................................................................................7 2.9. Finite Element Modeling .....................................................................................................8 2.9.1. Constitutive Models for CMU .............................................................................................8 2.9.2. CMU Models .......................................................................................................................9 3. METHODS, ASSUMPTIONS, AND PROCEDURES .....................................................11 3.1. Overview ............................................................................................................................11 3.2. Dynamic Testing Overview ...............................................................................................11 3.2.1. Test