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Research Project Work Plan For Seismic Performance Design Criteria For Existing Bridge Bent Plastic Hinge Regions
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Book Synopsis Research Project Work Plan for Seismic Performance Design Criteria for Existing Bridge Bent Plastic Hinge Regions by : Peter Dusicka
Download or read book Research Project Work Plan for Seismic Performance Design Criteria for Existing Bridge Bent Plastic Hinge Regions written by Peter Dusicka and published by . This book was released on 2016 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Performance Design Criteria for Bridge Bent Plastic Hinge Regions by : A. K. M. Golam Murtuz
Download or read book Seismic Performance Design Criteria for Bridge Bent Plastic Hinge Regions written by A. K. M. Golam Murtuz and published by . This book was released on 2020 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this research was to quantify the material strain limits for seismic assessment of existing sub-standard reinforced concrete bridge bents considering operational performance design criteria. Limited confidence exists in the current material strain limit state for operational performance criteria due to lack of experimental results considering the typical detailing of Oregon bridges and the cumulative damage effect resulting from an anticipated long-duration Cascadia Subduction Zone (CSZ) event. Component details for bridge bents such as geometry and reinforcing details were determined through a statistical analysis of available bridge drawings built prior to 1990 in the State of Oregon. Three full-scale bridge bent column-footing subassembly specimens were constructed and subjected to reverse cyclic lateral deformations utilizing a traditional loading protocol and a protocol representing the demands expected from a CSZ earthquake. The tests were designed so that variable axial loading could be applied in order to simulate the secondary effects experienced in a column that is part of a multi-column bent during an earthquake event. Material strains along with global and local deformation quantities were measured with a suite of external and internal sensors mounted to and embedded in the specimens. Despite having sub-standard seismic detailing, all three specimens exhibited ductile behavior under reverse cyclic lateral loading, achieving a minimum displacement ductility of 8.0. The obtained results also suggest that the material strain limits currently used for the seismic evaluation of existing bridges in Oregon considering operational performance criteria are conservative, but may still require further experimental validation. Finally, strain limits based on previous research at Portland State University (PSU) were compiled and combined with the results from this study to propose recommended strain limit values.
Book Synopsis Seismic Performance Design Criteria of Existing Bridge Bent Plastic Hinge Region and Rapid Repair Measures of Earthquake Damaged Bridges Considering Future Resilience by :
Download or read book Seismic Performance Design Criteria of Existing Bridge Bent Plastic Hinge Region and Rapid Repair Measures of Earthquake Damaged Bridges Considering Future Resilience written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main objective of this research was to evaluate the seismic performance of existing sub-standard reinforced concrete (RC) bridge column-spread footing subassemblies and to quantify the material strain limits through a full-scale experimental program. A total of six column-footing test specimens with pre-1990 construction details were subjected to reverse cyclic lateral loading, utilizing a conventional three-cycle symmetric loading protocol and a protocol representing the demands expected from a CSZ earthquake. Additionally, the tests were designed so that variable axial loading could be applied to simulate the secondary load effects experienced during an earthquake in a column that is part of a multi-column bent. A rapid repair method incorporating semi-permanent installation was also developed, anticipating the need for quick measures following the Cascadia Subduction Zone (CSZ) earthquake, which is expected to damage the existing bridges in the Pacific Northwest and spread geographically throughout the region. The proposed repair methodology uses capacity design principles to protect the remainder of the bridge from future earthquakes and eradicates the need for establishing rebar continuity, resulting in a less labor-intensive repair method. The adopted concept is to utilize U-shaped metallic plates as externally attached ductile fuses to be anchored to the non-damaged part of the column, hence bypassing the damaged zone to restore the lateral capacity.
Author :National Cooperative Highway Research Program Publisher :Transportation Research Board ISBN 13 :0309067537 Total Pages :55 pages Book Rating :4.3/5 (9 download)
Book Synopsis Comprehensive Specification for the Seismic Design of Bridges by : National Cooperative Highway Research Program
Download or read book Comprehensive Specification for the Seismic Design of Bridges written by National Cooperative Highway Research Program and published by Transportation Research Board. This book was released on 2002 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Performance and Failure Behavior of Plastic Hinge Regions in Flexural Bridge Columns by : Yael D. Hose
Download or read book Seismic Performance and Failure Behavior of Plastic Hinge Regions in Flexural Bridge Columns written by Yael D. Hose and published by . This book was released on 2001 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :José Ignacio Restrepo Publisher :Transportation Research Board National Research ISBN 13 : Total Pages :124 pages Book Rating :4.3/5 (555 download)
Book Synopsis Development of a Precast Bent Cap System for Seismic Regions by : José Ignacio Restrepo
Download or read book Development of a Precast Bent Cap System for Seismic Regions written by José Ignacio Restrepo and published by Transportation Research Board National Research. This book was released on 2011 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report explores the development and validation of precast concrete bent cap systems for use throughout the nation's seismic regions. The report also includes a series of recommended updates to the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Bridge Design Specifications, Guide Specification for LRFD Seismic Bridge Design, and AASHTO LRFD Bridge Construction Specifications that will provide safe and reliable seismic resistance in a cost-effective, durable, and constructible manner. A number of deliverables are provided as attachments to NCHRP Report 681, including design flow charts, design examples, example connection details, specimen drawings, specimen test reports, and an implementation plan from the research agency's final report. These attachments are only available online at http://www.trb.org/Publications/Blurbs/Development_of_a_Precast_Bent_Cap_System_for_Seism_164866.aspx.TRB's National Cooperative Highway Research Program (NCHRP) Report 681: Development of a Precast Bent Cap System for Seismic Regions explores the development and validation of precast concrete bent cap systems for use throughout the nation's seismic regions. The report also includes a series of recommended updates to the American Association of State Highway and Transportation Officials (AASHTO) Load and Resistance Factor Design (LRFD) Bridge Design Specifications, Guide Specification for LRFD Seismic Bridge Design, and AASHTO LRFD Bridge Construction Specifications that will provide safe and reliable seismic resistance in a cost-effective, durable, and constructible manner. A number of deliverables are provided as attachments to NCHRP Report 681, including design flow charts, design examples, example connection details, specimen drawings, specimen test reports, and an implementation plan from the research agency's final report. These attachments, which are only available online.
Book Synopsis Seismic Performance and Retrofit of Multi-column Bridge Bents by : David I. McLean
Download or read book Seismic Performance and Retrofit of Multi-column Bridge Bents written by David I. McLean and published by . This book was released on 1998 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Performance of Prestressed Pile-to-bent Cap Connections by : Mark Eli Cukrov
Download or read book Seismic Performance of Prestressed Pile-to-bent Cap Connections written by Mark Eli Cukrov and published by . This book was released on 2012 with total page 790 pages. Available in PDF, EPUB and Kindle. Book excerpt: A portion of the bridge structures in South Carolina use a pile-to-bent cap connection detail in their bridge bents which relies completely on mechanical bond to develop a load path from the superstructure of the bridge to the foundation. Typical construction practices involve driving precast prestressed concrete piles to a specified depth and leaving a portion of the pile above ground to be used for an intermediate superstructure support. The portions of the piles above ground are leveled within tolerance, and a bent cap cage is constructed around them with a specified pile embedment depth into the bent cap. Once this is completed, the bent cap is cast-in-place. No dowel bars or brooming of prestressing strands are used in the pile-to-bent cap connection. As part of a SCDOT sponsored research project to study the seismic performance of precast prestressed concrete piles plainly embedded into cast-in-place bent caps, a full scale 3-pile bridge bent was constructed based on typical SCDOT designs and subjected to earthquake loading at the Large Scale Structures Laboratory at the University of Nevada, Reno (UNR). The objective of the simulation was to study the seismic behavior of the pile-to-bent cap connection within an axial load range of 100 kips of compression to 50 kips of tension. This axial load range was specified by the SCDOT as previous tests investigating the pile-to-bent cap connections were performed at unrealistically high compressive axial loads. Additionally, the seismic performances of two conventional bent cap reinforcing details were investigated. One bent cap design was based on typical details used by the SCDOT, and the other was a heavier reinforcing detail proposed by UNR. Several analytical models were created in SAP200012 in an attempt to accurately capture the response of the 3-pile bent observed during the experiment. Three main inelastic model types were explored: the fiber hinge, the coupled P-M hinge, and the multi-linear plastic link element. Of these three types, the nonlinear plastic link element produced the closest correlation between observed and calculated results. Based on observations made during the 3-pile bent experiment, it was determined that bridge bent designs using prestressed concrete piles plainly embedded into cast-in-place bent caps can be used in seismic areas. Reasonable axial tension forces do not adversely affect the performance of the connections. Both of the bent cap reinforcing details were shown to be conservative, and the choice between either detail should be left to the bridge designer.
Book Synopsis Design Guidelines for Assessment Retrofit and Repair of Bridges for Seismic Performance by : M. J. N Priestley
Download or read book Design Guidelines for Assessment Retrofit and Repair of Bridges for Seismic Performance written by M. J. N Priestley and published by . This book was released on 1992 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guide Specifications for Seismic Isolation Design by :
Download or read book Guide Specifications for Seismic Isolation Design written by and published by AASHTO. This book was released on 2010 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: This edition is based on the work of NCHRP project 20-7, task 262 and updates the 2nd (1999) edition -- P. ix.
Book Synopsis AASHTO Guide Specifications for LRFD Seismic Bridge Design by :
Download or read book AASHTO Guide Specifications for LRFD Seismic Bridge Design written by and published by AASHTO. This book was released on 2011 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work offers guidance on bridge design for extreme events induced by human beings. This document provides the designer with information on the response of concrete bridge columns subjected to blast loads as well as blast-resistant design and detailing guidelines and analytical models of blast load distribution. The content of this guideline should be considered in situations where resisting blast loads is deemed warranted by the owner or designer.
Book Synopsis Seismic Performance of a Two-column Bridge Bent with Offset Plastic Hinges and Innovative CFRP Composite on Flexible Footings by : Erik W. Reinhardt
Download or read book Seismic Performance of a Two-column Bridge Bent with Offset Plastic Hinges and Innovative CFRP Composite on Flexible Footings written by Erik W. Reinhardt and published by . This book was released on 2003 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Seismic Design of Pipe-pin Connections in Concrete Bridges by : Arash Esmaili Zaghi
Download or read book Seismic Design of Pipe-pin Connections in Concrete Bridges written by Arash Esmaili Zaghi and published by . This book was released on 2010 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Telescopic pipe-pin two-way hinges are used in concrete bridges to eliminate moments while transferring shear and axial loads from integral bridge bent caps to reinforced concrete columns. The hinges consist of a steel pipe that is anchored in column with a protruded segment that extends into the bent cap. In the absence of experimental and analytical studies, design of pipe-pin hinges has been based on pure shear capacity of the steel pipe. The primary objective of this research was two folds: (1) to investigate the seismic performance of the current detail of pipe-pin hinges and propose necessary modifications and (2) to develop a reliable design method for pipe-pin hinges that reflects their actual behavior. This research was comprised of comprehensive experimental and analytical studies of pipe-pin connections and their components including a shake table study of a two-column pier model. The experimental component of the study included three sets of test models: (1) six push-off specimens to evaluate the bearing strength of concrete against the steel pipe, (2) six pure shear specimens to determine the yielding and ultimate shear capacities, and (3) a two-column 0.2-scale bridge pier model incorporating pipe-pin hinges that were designed based on the proposed guideline. The pier model was used to evaluate the new design method under earthquake excitation. The experiments showed that the lateral failure mechanism is typically controlled by concrete diagonal tensile cracking of the column in combination with flexural yielding of the steel pipe as opposed to pure shear, although the pure shear failure mode should be considered when a large amount of lateral steel is used in the column. Another possible mode of failure is bearing failure of the concrete around the pipe in heavily reinforced columns. The shake table experiment of the pier model confirmed that the proposed design method meets the safety and performance requirements under seismic loading. The analytical studies consisted of (1) a stick model in SAP2000 that was developed for pipe shear key subassemblies, (2) detailed nonlinear FE models using ABAQUS that were used to performed an extensive parametric study in order to shed light on different aspects of the behavior and generate the required data for the design guideline, and (3) a model in OpenSees that utilized a macro model for the pipe-pin hinges. The experimental and analytical results helped identify the means to improve the performance of current pipe-pin hinge details. The pipe studs and spiral around the can proved to be unnecessary and were eliminated in the proposed standard detail. A thicker tapered hinge throat was suggested to solve the problem of local concrete damage to the throat and column edges. As a possible extension of pipe-pin application, a study was conducted on pipe-pins combined with isolation and damping systems. The analytical modeling of these details showed that modified connections can reduce the demands on the structure by dissipating a major portion of the earthquake energy.
Book Synopsis Research Project Work Plan for Bridge Seismic Retrofit Measures Considering Subduction Zone Earthquakes by : Peter Dusicka
Download or read book Research Project Work Plan for Bridge Seismic Retrofit Measures Considering Subduction Zone Earthquakes written by Peter Dusicka and published by . This book was released on 2011 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research Project Work Plan for Bridge Column Footing Performance and Seismic Retrofit Evaluation Considering Soil-structure Interaction by : Armin Wilhelm Stuedlein
Download or read book Research Project Work Plan for Bridge Column Footing Performance and Seismic Retrofit Evaluation Considering Soil-structure Interaction written by Armin Wilhelm Stuedlein and published by . This book was released on 2019 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Highway Research Abstracts written by and published by . This book was released on 1993 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Plastic Hinge Models and Inelastic Analysis Tools for Performance-based Seismic Design of RC Bridge Columns by : Lauren Kimberly Fedak
Download or read book Evaluation of Plastic Hinge Models and Inelastic Analysis Tools for Performance-based Seismic Design of RC Bridge Columns written by Lauren Kimberly Fedak and published by . This book was released on 2012 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt:
