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Design And Development Of A Seismic Isolation System For Commercial Storage Rack

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Design And Development Of A Seismic Isolation System For Commercial Storage Rack

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Author : Robert Joseph Michael
language : en
Publisher:
Release Date : 2013

Design And Development Of A Seismic Isolation System For Commercial Storage Rack written by Robert Joseph Michael and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.

During the past forty years, the number of large retail stores (often referred to as big-box stores) has grown significantly. These stores incorporate steel pallet storage racks loaded with heavy merchandise which pose a life-safety risk to the exposed general public during a seismic event. A base isolation system compatible with conventional racks is designed and developed which provides seismic isolation primarily in the cross-aisle direction. The new patented base isolation system provides seismic isolation by incorporating heavily damped elastomeric bearings (referred to here as seismic mounts) and low-friction bearing plates. The objective of the base isolation system is to reduce horizontal accelerations of the rack to eliminate product shedding and structural damage during a major earthquake without interfering with normal, day-to-day material handling operations. Full scale shake table testing show the new base isolation system meets the performance objectives recommended in the FEMA-460 document zSeismic Considerations for Steel Storage Racks Located in Areas Accessible to the Publicy for both life safety under the Design Earthquake (DE) and for collapse prevention under the Maximum Considered Earthquake (MCE). Special heavily damped (HD) butyl compounds are developed and utilized in the seismic mounts. These compounds are statically and dynamically characterized which provides input data for numerical studies. Non-linear hyperelastic material models are developed and used with finite element analysis to design various base isolation systems. Several of these new base isolation systems are optimized to achieve characteristics that expand their use from lightly loaded racks to heavily loaded racks. Designs are further optimized based on feedback from shake table testing and transient structural analysis. The new base isolation system is evaluated by uniaxial and triaxial shake table tests performed at the Structural Engineering and Earthquake Simulation Laboratory (SEESL) at the University of Buffalo (UB). Three phases of testing were performed on steel pallet storage racks both directly anchored (conventional) and with the new base isolation system. Tests were performed with both simulated and real merchandise. The results of the seismic tests demonstrate the improved structural performance of rack structures incorporating the new base isolation system. Cross-aisle absolute accelerations and inter-story drifts of the base isolated rack structure are reduced by more than 70% compared to the same rack conventionally anchored at its base. Numerical simulations (transient structural, finite element analysis) are presented comparing storage rack response against tests performed on the tri-axial shake table. The simulations agree with experimental test results within 20%. The simulation model is used to determine optimal seismic isolation parameters that satisfy the practical range of rack shelf loads and configurations expected in typical warehouse and store installations.

Dynamics Of Civil Structures Volume 2

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Author : Juan Caicedo
language : en
Publisher: Springer
Release Date : 2015-05-08

Dynamics Of Civil Structures Volume 2 written by Juan Caicedo and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-05-08 with Science categories.

Dynamics of Civil Structures, Volume 2. Proceedings of the 33rd IMAC, , A Conference and Exposition on Balancing Simulation and Testing, 2015, the second volume of ten from the Conference brings together contributions to this important area of research and engineering. The collection presents early findings and case studies on fundamental and applied aspects of Structural Dynamics, including papers on: Modal Parameter Identification Dynamic Testing of Civil Structures Human Induced Vibrations of Civil Structures Correlation & Updating Operational Modal Analysis Damage Detection of Structures Bridge Structures Damage Detection Models Experimental Techniques for Civil Structures

Current Perspectives And New Directions In Mechanics Modelling And Design Of Structural Systems

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Author : Alphose Zingoni
language : en
Publisher: CRC Press
Release Date : 2022-09-02

Current Perspectives And New Directions In Mechanics Modelling And Design Of Structural Systems written by Alphose Zingoni and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-09-02 with Technology & Engineering categories.

Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems comprises 330 papers that were presented at the Eighth International Conference on Structural Engineering, Mechanics and Computation (SEMC 2022, Cape Town, South Africa, 5-7 September 2022). The topics featured may be clustered into six broad categories that span the themes of mechanics, modelling and engineering design: (i) mechanics of materials (elasticity, plasticity, porous media, fracture, fatigue, damage, delamination, viscosity, creep, shrinkage, etc); (ii) mechanics of structures (dynamics, vibration, seismic response, soil-structure interaction, fluid-structure interaction, response to blast and impact, response to fire, structural stability, buckling, collapse behaviour); (iii) numerical modelling and experimental testing (numerical methods, simulation techniques, multi-scale modelling, computational modelling, laboratory testing, field testing, experimental measurements); (iv) design in traditional engineering materials (steel, concrete, steel-concrete composite, aluminium, masonry, timber); (v) innovative concepts, sustainable engineering and special structures (nanostructures, adaptive structures, smart structures, composite structures, glass structures, bio-inspired structures, shells, membranes, space structures, lightweight structures, etc); (vi) the engineering process and life-cycle considerations (conceptualisation, planning, analysis, design, optimization, construction, assembly, manufacture, maintenance, monitoring, assessment, repair, strengthening, retrofitting, decommissioning). Two versions of the papers are available: full papers of length 6 pages are included in the e-book, while short papers of length 2 pages, intended to be concise but self-contained summaries of the full papers, are in the printed book. This work will be of interest to civil, structural, mechanical, marine and aerospace engineers, as well as planners and architects.

Lessloss

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Author : Gian Michele Calvi
language : en
Publisher:
Release Date : 2004

Lessloss written by Gian Michele Calvi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Technology & Engineering categories.

Radioactive Waste Management

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Author :
language : en
Publisher:
Release Date : 1981

Radioactive Waste Management written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Radioactive waste disposal categories.

Jsme International Journal

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Author :
language : en
Publisher:
Release Date : 1991

Jsme International Journal written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Combustion engineering categories.

Energy Research Abstracts

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Author :
language : en
Publisher:
Release Date : 1994

Energy Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Power resources categories.

Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.