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Author : Patrick Laplace
Publisher :
ISBN 13 :
Total Pages : 174 pages
Book Rating : 4.:/5 (318 download)
Download or read book Shake Table Testing of Flexure Dominated Reinforced Concrete Bridge Columns written by Patrick Laplace and published by . This book was released on 1999 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Patrick N. Laplace
Publisher :
ISBN 13 :
Total Pages : 882 pages
Book Rating : 4.:/5 (578 download)
Download or read book Experimental Study and Analysis of Retrofitted Flexure and Shear Dominated Circular Reinforced Concrete Bridge Columns Subjected to Shake Table Excitation written by Patrick N. Laplace and published by . This book was released on 2003 with total page 882 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Brett A. McElhaney
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (1 download)
Download or read book Shake Table Testing of Flared Bridge Columns with Steel Jacket Retrofit written by Brett A. McElhaney and published by . This book was released on 2001 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Pardeep Kumar
Publisher :
ISBN 13 :
Total Pages : 187 pages
Book Rating : 4.:/5 (919 download)
Download or read book Shaking Table Evaluation of Reinforced Concrete Bridge Columns Repaired Using Fiber Reinforced Polymer Jackets written by Pardeep Kumar and published by . This book was released on 2014 with total page 187 pages. Available in PDF, EPUB and Kindle. Book excerpt: After an earthquake event it is the responsibility of the engineers to decide if the bridge structure is safe for the traffic flow, requires repair or needs to be replaced completely depending on the damage level. Effective, economical and timely repair of Reinforced Concrete (RC) bridges after a seismic event is crucial to avoid traffic congestion and lengthy detours. Fiber Reinforced Polymer (FRP) composite laminates are one of few options with several advantages. Use of FRP jackets in structural engineering is gaining interest in applications such as strengthening weak structural elements, improving the existing structure capacity to resist increased loads due to change in use of structure and retrofitting structural elements for seismic upgrades. The study presents shaking table experimental investigation to evaluate the use of FRP for repairing RC bridge columns with circular cross-sections. Two 1/4-scale RC columns were tested in as-built configuration. Both tests had identical geometry and reinforcement details except for the spacing of the transverse reinforcing bars. One column had closely spaced hoops satisfying code requirements and the other had larger spacing, representing a shear-critical column. The test specimens were subjected to a series of horizontal and vertical excitations on a shaking table and experienced moderate to high damage. The damaged columns were subsequently repaired with unidirectional FRP composite laminates and subjected to the same set of earthquake excitations. The obtained experimental data showed that the repaired columns achieved higher strength and ductility with lower residual displacements compared to the as-built ones contributing to the resiliency of the bridge system. A three-dimensional (3D) Finite Element (FE) model was developed and calibrated using the experimental test results. A bilinear confined concrete model was adopted to model the constitutive relationship of the FRP confined concrete without explicitly modeling the FRP composite jacket. Due to variability of the material properties, several calibration parameters were studied to develop a reliable FE model. The results of the dynamic FE analysis showed great potential for 3D modeling of the repaired test specimens. From this study, it is concluded that the used FRP composite laminates represent a viable solution for the effective and rapid repair of damaged RC bridge columns. A parametric study was conducted to evaluate the horizontal force, deformation, and confining strain response of the retrofitted RC bridge columns using the computational model. The response of the FE models with different number of FRP plies in the jacket was investigated. The analytical results suggested that increasing the number of FRP plies in the jacket significantly changed the confining strains response of the confined cross-section but the global force-deformation was not significantly affected.
Author : Roland Nimis
Publisher :
ISBN 13 :
Total Pages : 626 pages
Book Rating : 4.E/5 ( download)
Download or read book Proceedings of the Third National Seismic Conference and Workshop on Bridges and Highways written by Roland Nimis and published by . This book was released on 2002 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hyung IL. Jeong
Publisher :
ISBN 13 :
Total Pages : 376 pages
Book Rating : 4.:/5 (268 download)
Download or read book Shaking Table Tests and Numerical Investigation of Self-centering Reinforced Concrete Bridge Columns written by Hyung IL. Jeong and published by . This book was released on 2008 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Patrick Laplace
Publisher :
ISBN 13 :
Total Pages : 468 pages
Book Rating : 4.:/5 (1 download)
Download or read book Experimental Study and Analysis of Retrofitted Flexure and Shear Dominated Circular Reinforced Concrete Bridge Columns Subjected to Shake Table Excitation written by Patrick Laplace and published by . This book was released on 2001 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mervyn Kowalsky
Publisher :
ISBN 13 :
Total Pages : 292 pages
Book Rating : 4.F/5 ( download)
Download or read book Shake Table Testing of Lightweight Concrete Bridges written by Mervyn Kowalsky and published by . This book was released on 1997 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lightweight concrete has been used frequently in the past for building structures, however, its limited use in bridges as well as questionable past earthquake performance have pointed towards the need to investigate the dynamic behavior. The research presented here represents the third phase of the lightweight concrete testing program at the University of California, San Diego, where the dynamic behavior of the material is considered. The results of the first two phases of testing indicated that lightweight concrete performs well with little decrease in shear and flexural strength under cyclic loading. The testing described here encompasses two test units subjected to earthquake time histories on the Shake Table. The objective of testing is to further verify the results of the first two phases of cyclic testing where shear and flexural response were considered, as well as to investigate the overall dynamic behavior. Results are presented in the form of a qualitative assessment of dynamic response as well as further verification of the recommendations presented during the first two stages of testing. Additionally, a steel jacket repair of the prestressed unit allowed investigation of the dynamic behavior of lightweight concrete after a damaging event and subsequent repair.
Author :
Publisher :
ISBN 13 :
Total Pages : 66 pages
Book Rating : 4.:/5 (1 download)
Download or read book A Preliminary Study of Shake Table Response of a Two-column Bridge Bent on Flexible Footings written by and published by . This book was released on 2002 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Frank M. Martinovic
Publisher :
ISBN 13 :
Total Pages : 176 pages
Book Rating : 4.:/5 (1 download)
Download or read book Dynamic Testing and Analysis of Non-prismatic Reinforced Concrete Bridge Columns Retrofitted with FRP Jackets written by Frank M. Martinovic and published by . This book was released on 2001 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Konstantinos G. Megalooikonomou
Publisher : Cambridge Scholars Publishing
ISBN 13 : 9781527527850
Total Pages : 387 pages
Book Rating : 4.5/5 (278 download)
Download or read book Seismic Assessment and Retrofit of Reinforced Concrete Columns written by Konstantinos G. Megalooikonomou and published by Cambridge Scholars Publishing. This book was released on 2019-05 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reinforced concrete columns play a very important role in structural performance. As such, it is essential to apply a suitable analytical tool to estimate their structural behaviour considering all failure mechanisms such as axial, shear, and flexural failures. This book highlights the development of a fiber beam-column element accounting for shear effects and the effect of tension stiffening through reinforcement-to-concrete bond, along with the employment of suitable constitutive material laws.
Author : Mostafa Tazarv
Publisher :
ISBN 13 :
Total Pages : 406 pages
Book Rating : 4.:/5 (318 download)
Download or read book Next Generation of Bridge Columns for Accelerated Bridge Construction in High Seismic Zones written by Mostafa Tazarv and published by . This book was released on 2014 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Longitudinal bar debonding allowed spread of yielding and prevented premature failure of reinforcements in UHPC-filled duct connections and grouted coupler column pedestal. The SMA-reinforced ECC column showed superior seismic performance compared to a conventional column in which the plastic hinge damage was limited to only ECC cover spalling even under 12% drift ratio cycles. The column residual displacements were 79% lower than CIP residual displacements on average due to the superelastic NiTi SMA longitudinal reinforcement, and higher base shear capacity and higher displacement capacity were observed. The analytical modeling methods were simple and sufficiently accurate for general design and analyses of precast components proposed in the present study. The proposed symmetrical material model for reinforcing NiTi superelastic SMA was found to be a viable alternative to the more complex asymmetrical model.
Author : Nathan W. Harrison
Publisher :
ISBN 13 : 9781124682358
Total Pages : 542 pages
Book Rating : 4.6/5 (823 download)
Download or read book Preliminary Seismic Analysis and Design of Reinforced Concrete Bridge Columns for Curved Bridge Experiments written by Nathan W. Harrison and published by . This book was released on 2011 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of a Federal Highway Administration (FHWA) sponsored research project to study highway system resilience, a 40 percent scale curved steel plate girder bridge is to be constructed and subjected to earthquake simulation at the Large Scale Structures Laboratory on the University of Nevada, Reno (UNR) campus. The 145 foot long bridge model is to have three-spans, supported on two single-column bents with hammer-head pier caps, and have a subtended angle of 104°. The purpose of the shake table testing is to study the seismic system behavior of the bridge as well as additional bridge components including; conventional columns, isolation, ductile-cross frames, abutment behavior, and the seismic behavior of bridges including the effects of live load. Ultimately design recommendations will be developed from this research. The research presented in this document is the results of preliminary analysis and design of conventional reinforced concrete bridge columns and substructure elements as part of the larger project to examine global seismic behavior of the scaled bridge model. In order to prepare for seismic testing of the scaled bridge model, extensive pre-experimental numerical analysis was performed. Finite element models were developed using SAP2000 and non-linear time-history analysis was performed to investigate the seismic response of the bridge model. Analytical bridge models were analyzed using both 16-inch and 20-inch column diameters and various abutment support conditions. The models were subjected to two levels of horizontal bidirectional earthquake excitation representing a design level earthquake and a large amplitude earthquake intended to cause column failure. Using the results from the analysis, preliminary construction plans were prepared for one set of columns and the adjacent substructure components using the provisions from the AASHTO Guide Specifications for LRFD Seismic Bridge Design. In addition to the investigation into column performance, a parametric study was performed to determine axial response of the bearings at both the abutments and piers when subjected to seismic loading. The numerical analysis showed that system effects due to superstructure-substructure interaction can cause column flexural response that is typically not observed with stand-alone column tests. The effects of bridge horizontal curvature was shown to have a significant impact on the axial performance of the bearings in which the response was not uniform for all bearing at one support location. As a component of the analysis and design, two strut-and-tie models were developed to provide adequate joint detailing in order to ensure capacity protection of the column-to-bentcap connection under multiple cycles of seismic loading.
Author : Gordon P. Warn
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.:/5 (892 download)
Download or read book Estimating the Residual Axial Load Capacity of Flexure-dominated Reinforced Concrete Bridge Columns written by Gordon P. Warn and published by . This book was released on 2014 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 566 pages
Book Rating : 4.:/5 (1 download)
Download or read book Seismic Performance and Retrofitting of Reinforced Concrete Bridge Bents written by and published by . This book was released on 2002 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary available via the World Wide Web as of 8/29/2002 from the Bridge Research and Information Center web site,
Author :
Publisher :
ISBN 13 :
Total Pages : 868 pages
Book Rating : 4.3/5 (197 download)
Download or read book California State Publications written by and published by . This book was released on 2002 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gregory L. Orozco
Publisher :
ISBN 13 :
Total Pages : 194 pages
Book Rating : 4.:/5 (318 download)
Download or read book The Effects of a Large Velocity Pulse on Reinforced Concrete Bridge Columns written by Gregory L. Orozco and published by . This book was released on 2001 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
