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Preliminary Seismic Analysis And Design Of Reinforced Concrete Bridge Columns For Curved Bridge Experiments
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Book Synopsis Preliminary Seismic Analysis and Design of Reinforced Concrete Bridge Columns for Curved Bridge Experiments by : Nathan W. Harrison
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.
Book Synopsis Seismic Design and Assessment of Bridges by : Andreas J Kappos
Download or read book Seismic Design and Assessment of Bridges written by Andreas J Kappos and published by Springer Science & Business Media. This book was released on 2012-04-17 with total page 233 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book focuses on the use of inelastic analysis methods for the seismic assessment and design of bridges, for which the work carried out so far, albeit interesting and useful, is nevertheless clearly less than that for buildings. Although some valuable literature on the subject is currently available, the most advanced inelastic analysis methods that emerged during the last decade are currently found only in the specialised research-oriented literature, such as technical journals and conference proceedings. Hence the key objective of this book is two-fold, first to present all important methods belonging to the aforementioned category in a uniform and sufficient for their understanding and implementation length, and to provide also a critical perspective on them by including selected case-studies wherein more than one methods are applied to a specific bridge and by offering some critical comments on the limitations of the individual methods and on their relative efficiency. The book should be a valuable tool for both researchers and practicing engineers dealing with seismic design and assessment of bridges, by both making the methods and the analytical tools available for their implementation, and by assisting them to select the method that best suits the individual bridge projects that each engineer and/or researcher faces.
Book Synopsis Seismic Behavior of Circular Reinforced Concrete Bridge Columns Under Combined Loading Including Torsion by : Suriya Prakash Shanmugam
Download or read book Seismic Behavior of Circular Reinforced Concrete Bridge Columns Under Combined Loading Including Torsion written by Suriya Prakash Shanmugam and published by . This book was released on 2009 with total page 634 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Reinforced concrete (RC) columns of skewed and curved bridges with unequal spans and column heights can be subjected to combined loading including axial, flexure, shear, and torsion loads during earthquakes. The combination of axial loads, shear force, and flexural and torsional moments can result in complex failure modes of RC bridge columns. This study carried out experimental and analytical studies to investigate the seismic performance of circular RC columns under combined loading including torsion. The main variables considered here were (i) the ratio of torsion-to-bending moment (T/M), (ii) the ratio of bending moment-to-shear (M/V) or shear span (H/D), and (iii) the level of detailing for high and moderate seismicity (high or low spiral ratio). In particular, the effects of the spiral reinforcement ratio and shear span on strength and ductility of circular RC columns under combined loading were addressed. In addition, the effects of torsional loading on the bending moment-curvature, ductility, and energy dissipation characteristics were also considered. The analytical investigation examined the development of existing models for flexure and pure torsion. Interaction diagrams between bending, shear and torsional loads were established from a semi-empirical approach. A damage-based design approach for circular RC columns under combined loads was proposed by decoupling damage index models for flexure and torsion. Experimental and analytical results showed that the progression of damage was amplified by an increase in torsional moment. An increase in the transverse spiral reinforcement ratio delayed the progression of damage and changed the torsional-dominated behavior to flexural-dominated behavior under combined flexural and torsional moments"--Abstract, leaf iii.
Book Synopsis Seismic Performance of Circular Reinforced Concrete Bridge Columns Under Bidirectional Earthquake Loading by : Mahmoud Mohamad Hachem
Download or read book Seismic Performance of Circular Reinforced Concrete Bridge Columns Under Bidirectional Earthquake Loading written by Mahmoud Mohamad Hachem and published by . This book was released on 2002 with total page 570 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Design Aids for Nonlinear Pushover Analysis of Reinforced Concrete and Steel Bridges by : Jeffrey Ger
Download or read book Seismic Design Aids for Nonlinear Pushover Analysis of Reinforced Concrete and Steel Bridges written by Jeffrey Ger and published by CRC Press. This book was released on 2016-04-19 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear static monotonic (pushover) analysis has become a common practice in performance-based bridge seismic design. The popularity of pushover analysis is due to its ability to identify the failure modes and the design limit states of bridge piers and to provide the progressive collapse sequence of damaged bridges when subjected to major earthq
Book Synopsis Nonlinear Seismic Analysis and Design of Reinforced Concrete Bridge Structures by : Robert K. Dowell
Download or read book Nonlinear Seismic Analysis and Design of Reinforced Concrete Bridge Structures written by Robert K. Dowell and published by . This book was released on 1998 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Experimental and Computational Evaluation of Reinforced Concrete Bridge Beam-column Connections for Seismic Performance by : Clay Joshua Naito
Download or read book Experimental and Computational Evaluation of Reinforced Concrete Bridge Beam-column Connections for Seismic Performance written by Clay Joshua Naito and published by . This book was released on 2001 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Response of Columns in Horizontally Curved Bridges by : Michael John Levi
Download or read book Seismic Response of Columns in Horizontally Curved Bridges written by Michael John Levi and published by . This book was released on 2011 with total page 1290 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of a FHWA sponsored research project to study highway system resilience, a two-fifths scale curved steel plate girder bridge was constructed and subjected to earthquake simulation at the Large Scale Structures Laboratory at the University of Nevada, Reno (UNR). The objective of this simulation was to study the seismic system behavior of the bridge as well as additional components including reinforced concrete columns, effects of live load, isolation systems, ductile-cross frames, and abutment behavior. Ultimately design recommendations will be developed from this research. The research that is presented in this document is the results of the design, analysis, and experimental results of the conventional bridge columns and substructure elements as part of the research being conducted at UNR. The design of the substructure elements was completed according to the requirements of the AASHTO Guide Specifications for LRFD Seismic Bridge Design. In addition, the column design was based on the typical column sizes used by the local departments of transportation. The Sylmar recording of the 1994 Northridge, California earthquake was used as the input ground motion in the system. Analytical modeling using SAP2000 was performed on the scaled bridge model to estimate the seismic response of the bridge using non-linear time-history analysis. Numerical analysis was used to check the system at the design level earthquake and at a large amplitude motion intended to cause column failure. In addition, the analytical models were subjected to the testing protocol, ten ground motions with increasing amplitudes, to determine the effect of the loading protocol on the system. The response of the columns during experimental testing met all performance requirements at the design level and maximum considered earthquakes. The effects of shear keys in the system were shown to have an impact on the torsional loads in the system. At the end of the last test, longitudinal reinforcement started buckling in the columns, however; columns had not reached the maximum lateral capacity. Testing was stopped at this point due to shake table limitations.
Book Synopsis Seismic Performance of Well-confined Concrete Bridge Columns by : Dawn Ellen Lehman
Download or read book Seismic Performance of Well-confined Concrete Bridge Columns written by Dawn Ellen Lehman and published by . This book was released on 2000 with total page 330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Response of Concrete Bridges by : Kosalram Krishnan
Download or read book Seismic Response of Concrete Bridges written by Kosalram Krishnan and published by . This book was released on 1999 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Retrofit and Repair of Existing Reinforced Concrete Bridge Columns by Transverse Prestressing by : Majid Sadoughi Yarandi
Download or read book Seismic Retrofit and Repair of Existing Reinforced Concrete Bridge Columns by Transverse Prestressing written by Majid Sadoughi Yarandi and published by . This book was released on 2007 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Dynamic Testing and Analysis of Non-prismatic Reinforced Concrete Bridge Columns Retrofitted with FRP Jackets by : Frank M. Martinovic
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:
Book Synopsis Planning and Design of Bridges by : M. S. Troitsky
Download or read book Planning and Design of Bridges written by M. S. Troitsky and published by John Wiley & Sons. This book was released on 1994-10-28 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Timely, authoritative, extremely practical--an exhaustive guide tothe nontheoretical aspects of bridge planning and design. This bookaddresses virtually all practical problems associated with theplanning and design of steel and concrete bridge superstructuresand substructures. Drawing on its author's nearly half-century as abridge designer and engineer, it offers in-depth coverage of suchcrucial considerations as selecting the optimum location andlayout, traffic flow, aesthetics, design, analysis, construction,current codes and government regulations, maintenance andrehabilitation, and much more. * Offers in-depth coverage of all the steps involved in performingproper planning and design with comparative analyses of alternativesolutions * Includes numerous examples and case studies of existing bridgesand important projects underway around the world * Features a time-line history of bridge building from pre-Romantimes to the present * Summarizes key technical data essential to bridgeengineering * Supplemented with 200 line drawings and photos vividlyillustrating all concepts presented * Comprehensive coverage of CAD planning, design, and analysistechniques and technologies
Book Synopsis Next Generation of Bridge Columns for Accelerated Bridge Construction in High Seismic Zones by : Mostafa Tazarv
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 :Konstantinos G. Megalooikonomou Publisher :Cambridge Scholars Publishing ISBN 13 :1527530361 Total Pages :387 pages Book Rating :4.5/5 (275 download)
Book Synopsis Seismic Assessment and Retrofit of Reinforced Concrete Columns by : Konstantinos G. Megalooikonomou
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 2019-02-27 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.
Book Synopsis Development of a Seismic Design Method for Reinforced Concrete Two-way Bridge Column Hinges by : Zhiyuan Cheng
Download or read book Development of a Seismic Design Method for Reinforced Concrete Two-way Bridge Column Hinges written by Zhiyuan Cheng and published by . This book was released on 2006 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Retrofit of Circular Reinforced Concrete Bridge Columns by :
Download or read book Seismic Retrofit of Circular Reinforced Concrete Bridge Columns written by and published by . This book was released on 1990 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inadequate flexural strength and ductility or shear strength of concrete bridge columns has resulted in collapse or severe damage of a number of California bridges in recent moderate earthquakes. In general, these bridges were designed prior to the new seismic design methods which were implemented in the mid-seventies. Bridges constructed in accordance with the new design methods have performed well in recent earthquakes. However, the large number of older bridges that are in service, particularly freeway overpasses designed and constructed in the 1950s and 1970s, are now recognized to have substandard design details and to constitute a cause for major concern. This paper reports the results of a theoretical and experimental program investigating retrofit techniques for circular columns by encasing the critical regions within a steel jacket. The jacket is bonded to the column using grout. Results from six large-scale column tests show that the casing acts efficiently as confinement reinforcement, enabling a displacement ductility factor of greater than 6 to be achieved. The casing also inhibits bond failures at the laps of longitudinal reinforcement in the critical regions of the column by restraining the dilation and spalling of the cover concrete which degenerates into bond failure. Comparisons of 'as-built' and retrofitted columns are presented, and experimental strengths and ductilities are compared with analytical predictions. For the covering abstract of the Conference see IRRD Abstract no. 807839.
