Download or read book Experimental and Analytical Study of the XY friction Pendulum XY FP Bearing for Bridge Applications written by and published by . This book was released on 2007 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: The XY-FP bearing is a modified Friction Pendulum TM (FP) bearing that consists of two perpendicular steel rails with opposing concave surfaces and a connector. The connector resists tensile forces, slides to accommodate translation and provides rotation capacity about a vertical axis. Numerical and experimental studies on an isolated truss-bridge model were conducted to study both the behavior of an XY-FP isolated system under three-directional excitation and the potential uses of XY-FP bearings for the seismic isolation of bridges. Two of the key features of these bearings for the isolation of bridges are their resistance to tensile axial loads and the opportunity to provide a different period of isolation in each principal direction of the isolated structure. A 1/4-length-scale truss-bridge model with a clear span of 10.67 m and a total weight of 399 kN supported on XY-FP bearings was tested on a pair of earthquake simulators. Testing included acceleration orbits and near-field earthquake histories. The experimental results demonstrated the effectiveness of the XY-FP bearings as an uplift-prevention isolation system. The construction detail of the small-scale connector of the XY-FP bearings and misalignment of the isolators on the test fixture did not permit fully uncoupled orthogonal responses. Numerical analyses on an XY-FP isolated bridge with different isolation periods in the principal directions subjected to near field ground motions demonstrated the effectiveness of the XY-FP bearings to limit displacements in either the longitudinal or the transverse direction. Numerical analyses that investigated the sensitivity of the XY-FP isolation system response to differences in the coefficients of friction of the bearings demonstrated that bounding analysis using uniform upper and lower estimates of the coefficient of friction will generally provide conservative estimates of displacements and shear forces for isolation systems with non-uniform isolator properties.

Download or read book Experimental and Analytical Study of the XY friction Pendulum XY FP Bearing for Bridge Applications written by Claudia C. Martin-Artieda and published by . This book was released on 2007 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Research in Earthquake Engineering written by Fabio Taucer and published by Springer. This book was released on 2015-04-20 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this volume, top seismic experts and researchers from Europe and around the world, including the George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES) in the USA, present the most recent outcome of their work in experimental testing, as well as the results of the transnational access activities of external researchers who have used Europe's seven largest and most advanced seismic testing facilities in the framework of the Seismic Engineering Research Infrastructures for European Synergies (SERIES) Project financed by the European Commission in its 7th Framework Programme (2007-2013). This includes EU’s largest reaction wall facility, EU's four largest shaking table laboratories and its two major centrifuges. The work presented includes state-of-the-art research towards the seismic design, assessment and retrofitting of structures, as well as the development of innovative research toward new fundamental technologies and techniques promoting efficient and joint use of the research infrastructures. The contents of this volume demonstrate the fruits of the effort of the European Commission in supporting research in earthquake engineering.

Download or read book Analytical and Experimental Investigation of a Controlled Rocking Approach for Seismic Protection of Bridge Steel Truss Piers written by Michael Pollino and published by . This book was released on 2008 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Report written by and published by . This book was released on 2009 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanical Behavior of Multi spherical Sliding Bearings written by Daniel M. Fenz and published by . This book was released on 2008 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental and Analytical Study of a Friction Pendulum System FPS written by M. C. Constantinou and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Statistical and Mechanistic Fragility Analysis of Concrete Bridges written by Masanobu Shinozuka and published by . This book was released on 2007 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2007 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fragility Considerations in Highway Bridge Design written by Masanobu Shinozuka and published by . This book was released on 2007 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Evaluation of the Seismic Performance of Hospital Piping Subassemblies written by Elliott Richard Goodwin and published by . This book was released on 2007 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Centrifuge Modeling of Permeability and Pinning Reinforcement Effects on Pile Response to Lateral Spreading written by Lenart Luis Gonzalez Lagos and published by . This book was released on 2007 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Seismic Performance Evaluation of Isolation restraint Systems for Mechanical Equipment Light equipment study written by Saeed Fathali and published by . This book was released on 2007 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Linking Lifeline Infrastructure Performance and Community Disaster Resilience written by and published by . This book was released on 2008 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance Assessment of Conventional and Base isolated Nuclear Power Plants for Earthquake and Blast Loadings written by Yin-Nan Huang and published by . This book was released on 2008 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modeling of Seismic Wave Scattering for Large Pile Groups and Caissons written by Ignatius Po Lam and published by . This book was released on 2007 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents practical modeling procedures adopted in the bridge engineering community involving seismic dsigns and retrofits of long span bridges relative to treatment of wave propagation problems. It also discusses wave scattering issues arising from irregular foundation boundaries affecting seismic loading of the bridges, which is not explicitly considered in th current design practice. Wave scattering is generally implemented in the nuclear power plant industry for seismic designs of various containment systems often using frequency domain computer programs. To examine the subject of wave scattering for application to long span bridge foundations, systematic modeling is exercised using a time domain based computer program and verification is made against a frequency domain computer program. For present day seismic designs of major bridges, nonlinear time history analysis is a common procedure to examine seismic loading of the structure permitting plastic hinging and ductility to be implemented. Thus, the current trend is to adopt time domain based computer programs for performing wave scattering analyses which can also serve as a common platform to be used by both geotechnical and structural engineers for the global bridge model. A major benefit is to minimize the amount of work for data transfer and potential error arising from two different groups (geotechnical and structural engineers) working on different computer codes requiring different input/output. By using the same computer code by both geotechnical and structural engineers, many problems are eliminated. Typically, wave scattering analyses are conducted in the frequency domain. This report presents studies of wave scattering using a time domain computer program. The same computer program can be used by structural engineers to proceed with coding the superstructure model, directly using the results from the wave scatterings analysis. The report presents various sensitivity analyses in order to minimize wave reflection and refraction at the model's side boundaries. Numerical integration schemes and implementation of Rayleigh parameters are discussed. Careful examination of waves traveling the bottom boundary allows proper modeling of the half-space below the region of interest. The studies explore the effects from wave scattering on large pile groups and soft ground conditions, and findings on the frequency ranges where significant scattering is observed are reported. Large caissons are know to affect seismic wave scattering due to the large wave length implied by the dimensions of the foundation embedded in soil. Parametric studies are performed to examine the shaking level that is altered by the wave scattering mechanism. From the current findings, it appears that the wave scattering tends to reduce the shaking level, especially in the high frequency range, and hence is beneficial to the bridge design

Download or read book Seismic Evaluation and Rehabilitation of Critical Components of Electrical Power Systems written by and published by . This book was released on 2008 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: