Seismic Testing Of Precast Segmental Bridges Phase Iii
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Seismic Testing Of Precast Segmental Bridges
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Author :
language : en
Publisher:
Release Date : 2005
Seismic Testing Of Precast Segmental Bridges written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Concrete bridges categories.
Seismic Testing Of Precast Segmental Bridges
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Author :
language : en
Publisher:
Release Date : 2005
Seismic Testing Of Precast Segmental Bridges written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Concrete bridges categories.
Seismic Performance Of Precast Segmental Bridge Superstructures
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Author :
language : en
Publisher:
Release Date : 2002
Seismic Performance Of Precast Segmental Bridge Superstructures written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Bridges categories.
Seismic Analysis And Design Of Precast Concrete Segmental Bridges
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Author : Petros Sideris
language : en
Publisher:
Release Date : 2012
Seismic Analysis And Design Of Precast Concrete Segmental Bridges written by Petros Sideris and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
In this dissertation, the concept of hybrid sliding-rocking (HSR) precast concrete post-tensioned segmental members for seismic applications in bridges is introduced and investigated experimentally and numerically. The HSR members lie into the framework of accelerated bridge construction techniques (ABC) and are primarily intended for applications in moderate and high seismicity areas. The HSR members combine two fundamental components, namely the HSR segmental joints, and the internal unbonded post-tensioning. The HSR joints utilize relative segment-to-segment sliding (joint sliding) and gap opening (joint rocking) to mitigate the applied seismic loading. Joint sliding offers high energy dissipation with minor structural damage as well as moderate self-centering. On the other hand, joint rocking offers low energy dissipation and high self-centering capabilities that deteriorate at larger rocking rotations due to the resulting concrete crushing.^The response of HSR joints is affected by the geometry of the post-tensioning (PT) system along the member length. Hence, linear or nonlinear PT geometry may be used to control joint and member response properties. Two distinct types of HSR members were further studied: (i) HSR members with slip-dominant joints and linear PT geometry (abbreviated as HSR-SD members), and (ii) HSR members with rocking- dominant joints and nonlinear PT geometry (abbreviated as HSR-RD members). The concept of HSR bridges was evaluated through a two-stage experimental study. The first stage included shake table testing of a large-scale (~ 1:2. 39) single-span bridge specimen incorporating a HSR-RD superstructure and two HSR-SD single-column piers. Nearly 150 seismic tests were conducted including far-field and near-fault input motions scaled to different seismic hazard levels.^The second stage included quasi-static testing of the HSR-SD piers with a sequence of displacement-controlled loading cycles of increasing amplitude that eventually reached a drift ratio of approximately 15%. The experimental findings from the large-scale seismic and quasi-static testing programs were complemented by two additional experimental studies; one focusing on the identification of the frictional properties of the HSR joint interface, and another investigating the response of the strand-anchor systems (i.e., unbonded monostrands with their anchorage setups at their ends). Numerical predictions for the quasi-static testing were provided by a model of the HSR-SD pier generated with the ABAQUS general-purpose finite element software, while numerical predictions for the seismic testing were provided by a model of the HSR bridge specimen generated in SAP2000. Comparisons between numerical and experimental results are presented.^This dissertation is concluded with an investigation of the response properties of flexibility-based (or force-based) beam-column elements in the presence of softening section constitutive relations. This study identified and explained critical numerical instability problems observed during the development of force-based elements for HSR members.
Seismic Proof Testing Of Precast Segmental Bridge Superstructures With Lightly Stressed Continuity Tendons
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Author : Jeffrey Warren Densley
language : en
Publisher:
Release Date : 2003
Seismic Proof Testing Of Precast Segmental Bridge Superstructures With Lightly Stressed Continuity Tendons written by Jeffrey Warren Densley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Seismic Performance Of Precast Segmental Bridge Superstructures
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Author : Manu Garg
language : en
Publisher:
Release Date : 2002
Seismic Performance Of Precast Segmental Bridge Superstructures written by Manu Garg and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Precast Segmental Post Tensioned Concrete Bridge Columns For Seismic Regions
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Author : Yu-Chen Ou
language : en
Publisher:
Release Date : 2007
Precast Segmental Post Tensioned Concrete Bridge Columns For Seismic Regions written by Yu-Chen Ou and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
A simplified analytical model for static pushover analysis and a three-dimensional detailed finite element model for cyclic analysis of the proposed bridge columns are developed in this research. In addition, a stiffness degrading hysteretic model is proposed for response-history analysis. With the analytical models, a parametric study is conducted to examine the seismic performance of the proposed columns with different design parameters.
Seismic Response Of Precast Segmental Bridge Superstructures
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Author : Marc John Veletzos
language : en
Publisher:
Release Date : 2006
Seismic Response Of Precast Segmental Bridge Superstructures written by Marc John Veletzos and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Bridges categories.
Seismic Design And Performance Of Precast Concrete Segmental Bridge Columns
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Author : Joshua T. Hewes
language : en
Publisher:
Release Date : 2002
Seismic Design And Performance Of Precast Concrete Segmental Bridge Columns written by Joshua T. Hewes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Bridges categories.
Seismic Design And Analysis Of A Precast Segmental Concrete Bridge Model
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Author : Myrto Anagnostopoulou
language : en
Publisher:
Release Date : 2011
Seismic Design And Analysis Of A Precast Segmental Concrete Bridge Model written by Myrto Anagnostopoulou and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Concrete bridges categories.
"The primary objective of this study is to investigate the response of precast segmental concrete bridge structures, designed according to Accelerated Bridge Construction (ABC) techniques, when subjected to earthquake loading. A large-scale model of a single-span segmental bridge was designed to be tested on the dual six-degree of freedom shake tables of the Structural Engineering and Earthquake Simulation Laboratory (SEESL) at the University at Buffalo. The AASHTO LRFD Bridge Design Specifications and the PCI Bridge Design Manual were used for the design of the bridge model. A key concept incorporating post-tensioned internal unbounded tendons acting as the only continuous reinforcement between adjacent segments of both the superstructure and substructure was introduced in the design. Unbonded tendons can allow the triggering of a gap opening mechanism between adjacent segments and the system's self-centering response when subjected to seismic loads. In a companion effort, a two-dimensional numerical model of the segmental bridge superstructure was developed to verify its behavior under vertical seismic loads. The numerical model was analyzed under a series of vertical seismic excitations using nonlinear time-history dynamic analysis methods and its seismic response was evaluated considering different seismic intensities. The development and design of the segmental bridge model as well as the response of the superstructure's numerical model under vertical seismic loads are presented in this report"--Pages iii-iv.