Elastomeric Bearing Research
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Rotation Limits For Elastomeric Bearings
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Author : National Cooperative Highway Research Program
language : en
Publisher: Transportation Research Board
Release Date : 2008
Rotation Limits For Elastomeric Bearings written by National Cooperative Highway Research Program and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Bridges categories.
At head of title: National Cooperative Highway Research Program.
Elastomeric Bearing Research
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Author : John C. Minor
language : en
Publisher: Highway Research Board
Release Date : 1970-01-01
Elastomeric Bearing Research written by John C. Minor and has been published by Highway Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970-01-01 with Bridges categories.
The design and development of elastomeric bridge bearings has been almost entirely empirical, and many conflicts exist regarding current specifications and practices. An effort was made to define and separate those parameters that significantly affect the behavior and performance of elastomeric bridge bearings, toward the end of improving current designs and establishing design criteria. The research included a survey of the literature and available test data, an evaluation (testing) program, and the analysis of data generated.
Elastomeric Bridge Bearings
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Author : J. A. Yura
language : en
Publisher:
Release Date : 2001
Elastomeric Bridge Bearings written by J. A. Yura and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Science categories.
Evaluation Findings For Skellerup Base Isolation Elastomeric Bearings
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Author : Highway Innovative Technology Evaluation Center (U.S.)
language : en
Publisher: ASCE Publications
Release Date : 1998-01-01
Evaluation Findings For Skellerup Base Isolation Elastomeric Bearings written by Highway Innovative Technology Evaluation Center (U.S.) and has been published by ASCE Publications this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998-01-01 with Technology & Engineering categories.
Prepared by the Highway Innovative Technology Evaluation Center (HITEC), a CERF Service Center. This report summarizes the results of a detailedØevaluation of base isolation elastomeric bearings,Ømanufactured by Skellerup. The report is part of a program to test the performance of 11 seismic isolators and dampers produced by several manufacturers. The devicesØwere tested for stability, response during earthquake simulations, and fatigue and weathering effects.
Elastomeric Bearings Design Construction And Materials
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Author :
language : en
Publisher:
Release Date : 1964
Elastomeric Bearings Design Construction And Materials written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with Bridges categories.
Comparison Of Two Design Philosophies For Elastomeric Bearings
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Author : P. Ray Chaudhuri
language : en
Publisher:
Release Date : 1984
Comparison Of Two Design Philosophies For Elastomeric Bearings written by P. Ray Chaudhuri and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Bridges categories.
Elastomeric Bearings In High Demand Applications
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Author : Liwei Han
language : en
Publisher:
Release Date : 2016
Elastomeric Bearings In High Demand Applications written by Liwei Han and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Pot and disk bearings are typically used in high-demand bridge applications where significant demands are imposed on bearings at the supports to accommodate rotations and complex bridge movements from both environmental thermal loads and vehicular traffic. However, past bridge research, design, and installation experience demonstrates that less costly elastomeric bearings are not only easy to install, inspect, and replace, but also more forgiving of installation errors. The use of elastomeric bearings in high-demand applications results in much less structural restraint against bridge thermal deformation than other more sophisticated sliding bearings. Although past bridge design practice includes applications of elastomeric bearings in two steel trapezoidal box girder systems in Central Texas, the use of elastomeric bearings in high-demand application is nevertheless largely impeded by historical and current bearing design provisions at national and state levels that are unduly restrictive for large-sized elastomeric bearings as well as the scantiness of field, laboratory, and numerical investigations on them. This investigation reported in this dissertation is part of a research project including material study, full-scale testing, field monitoring, and finite-element studies, with a focus primarily on finite-element studies of elastomeric bearings in comparison with laboratory and field measurements. A three-dimensional finite-element model capable of simulating the behavior of elastomeric bearings in full-scale compression, shear, and rotation testing was first developed and validated by experimental results from the full-scale testing. More comprehensive parametric finite-element studies of elastomeric layers under axial load and rotational deformation were then carried out leading to the development of a reliable elastomeric bearing design with improved economy and serviceability, based on total shear strain approach. A three-dimensional finite-element study of a continuous curved steel trapezoidal box girder system (IH-35 NB & US-290 EB direct connector) was carried out to investigate the translational movements and rotations imposed on elastomeric bearings under thermal loads with 100-year return period, and validated by instrumentation measurements from field monitoring. Design suggestions were put forward with regard to determining demands on elastomeric bearing s under thermal loads in high-demand applications. A field investigation was finally carried out on elastomeric bearings on the instrumented bridge, two of which were found to be damaged to different extents. The results reveal that the two damaged bearings are subjected to excessive amount of transverse rotation. Further analyses by calculating the maximum shear strain of all bearings using the proposed design approach confirmed that the observed bearing damage is the direct result of the excessive transverse angle of inclination on the concrete bearing seat surface.
High Load Multi Rotational Bridge Bearings
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Author : John F. Stanton
language : en
Publisher: Transportation Research Board
Release Date : 1999
High Load Multi Rotational Bridge Bearings written by John F. Stanton and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Technology & Engineering categories.
An Experimental Study Of Elastomeric Bridge Bearings With Design Recommendations
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Author : Joseph Vincent Muscarella
language : en
Publisher:
Release Date : 1995
An Experimental Study Of Elastomeric Bridge Bearings With Design Recommendations written by Joseph Vincent Muscarella and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Bridges categories.
The purpose of this study was to analyze elastomeric bearing performance on the basis of elastomer hardness, shape factor, reinforcing shim orientation, degree of taper and compressive stress level with the goal of developing a simple design procedure which standardizes as many of those parameters as possible. Particular emphasis was placed on comparing the behavior of flat and tapered bearings. Experimentation included shear, compressive, and rotational stiffness tests, shear and compression fatigue loading, long-term compressive loading, and tests to determine compressive stress limits.
Expanding The Use Of Elastomeric Bearings For Higher Demand Applications
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Author : Konstantinos Victor Belivanis
language : en
Publisher:
Release Date : 2017
Expanding The Use Of Elastomeric Bearings For Higher Demand Applications written by Konstantinos Victor Belivanis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017 with categories.
Elastomeric bearings have been widely used in short-span bridge systems as they provide a reliable and cost-effective means of accommodating translations compared to the pot bearing alternatives. However, in higher demand applications pot and disk bearings are commonly used to accommodate significant forces and rotations and complex bridge movements from both thermal loads and daily truck traffic. Although elastomeric bearings have been designed for and utilized in twin steel trapezoidal box girder systems in Texas, classifying as higher demand applications, the lack of experimental and numerical research on such bearings, as well as some occasions of poor performance, dictate the need of further investigating their design requirements and performance. The research presented in this dissertation is part of a broader research project including material-level studies, field monitoring of bridge bearings, large-scale experimental testing, and finite element simulations. This dissertation focuses on the large-scale experimental testing and investigates the effect of several parameters on the compression and shear stiffness of elastomeric bearings. Specifically, bearing tests demonstrated the poor prediction ability current AASHTO axial stiffness prediction equations as well as a shear stiffness dependence on the level of axial load and, in some cases, on the shearing direction of the bearing. However, it was shown that both AASHTO Method A and B produce safe elastomeric bearing designs. The finite element studies demonstrated that shim misalignment and cover friction can cause a reduction in the axial stiffness of an elastomeric bearing. In addition, an extensive finite element parametric study was performed to show variations in elastomeric bearings shear stiffness with different axial loads and shearing directions with a wide range of aspect ratios and height to width ratios.