Seismic Design and Assessment of Bridges: Inelastic Methods of Analysis and Case Studies

ISBN-13: 9789400739420 / Angielski / Twarda / 2012 / 224 str.

Andreas J Kappos;M. Saiid Saiidi;M. Nuray Aydinoglu

Opis

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.

Spis treści

Preface 

Contributors 

1  Introduction
Andreas J. Kappos 

2  Modelling of Bridges for Inelastic Analysis
M. Saiid Saiidi, Antonio Arêde, Donatello Cardone, Pedro Delgado, Mauro Dolce, Matej Fischinger, Tatjana Isaković, Stavroula Pantazopoulou, Gokhan Pekcan, Rui Pinho, and Anastasios Sextos

2.1  Introduction

2.2  Superstructure (Deck)
2.2.1  Deck Types, Sectional Layouts and Properties
2.2.2  The Role of Deck Modelling in Seismic Assessment
2.2.3  Effects of Skew and Curvature in Plan
2.2.4  Verification of Deck Deformation Demands

2.3  Bearings and Shear Keys
2.3.1  Modelling of Bearings
2.3.2  Mechanical Bearings (Steel Bearings)
2.3.3  Modern Bearing Types
2.3.4  Modelling of Shear Keys

2.4  Isolation and Energy Dissipation Devices

2.5  Piers
2.5.1  Modelling for Seismic Response of Columns in Reinforced Concrete Bridges
2.5.2  Finite Length Plastic Hinge Model
2.5.3  Distributed Flexibility Based Element Model
2.5.4  Two and Three-Dimensional FEM Discretizations
2.5.5  Example 1 on Fiber Model Application
2.5.6  Example 2 on Fiber Model Application
2.5.7  Analytical Modelling of Hollow Box Columns

2.6  Modelling of dynamic interaction between piers, foundation and soil
2.6.1  Pseudo-static Winkler approach
2.6.2  Linear Soil-Foundation-Bridge Interaction Analysis in the Time Domain
2.6.3  Nonlinear Soil-Foundation-Bridge Interaction Analysis in the Time Domain

2.7  Modelling of Abutment-Embankment-Superstructure Interaction
2.7.1  Simple P-y Relationships for Modelling Embankment-abutment Systems
2.7.2  Typical Bridges Studied
2.7.3  Modelling of the Abutment-Foundation-Backfill-Embankment Systems
2.7.4  Proposed P-y Relationships for Typical Abutment-Embankment Systems and Comparison with Caltrans Guidelines

3  Methods for Inelastic Analysis of Bridges
M. Nuray Aydınoğlu, Matej Fischinger, Tatjana Isaković, Andreas J. Kappos, and Rui Pinho

3.1  Introduction

3.2  Nonlinear Response History Analysis (NRHA) procedure

3.3  Nonlinear analysis procedures based on pushover analysis
3.3.1    General
3.3.2    Historical vs. contemporary implementation of pushover analysis

3.4  Single-mode pushover analysis procedures
3.4.1  Single-mode pushover analysis procedure with invariant load patterns: The N2 Method
3.4.2  Single-mode pushover analysis procedure with adaptive load or displacement patterns

3.5  Multi-mode pushover analysis procedures
3.5.1  Multi-mode procedure based on independent modal pushover analyses with invariant load patterns: The MPA (Modal Pushover Analysis) Method
3.5.2  Simultaneous multi-mode pushover procedure with modal adaptive displacement patterns: The Incremental Response Spectrum Analysis (IRSA) Method
3.5.3  Multi-mode procedures based on single-run pushover analysis with modal combined adaptive load or displacement patterns

4  Case studies and comparative evaluation of methods
Tatjana Isaković, Antonio Arêde, Donatello Cardone, Pedro Delgado, Matej Fischinger, Andreas J. Kappos, Nelson Vila Pouca, Rui Pinho, and Anastasios Sextos

4.1  Introduction

4.2  Basic parameters that influence the applicability of pushover methods

4.3  Case studies – comparison of alternative methods
4.3.1  Case study 1: Single-mode and multimodal pushover, and dynamic response history, analyses of bridges
4.3.2  Case study 2: Pushover and dynamic response history analyses of bridges
4.3.3  Case study 3: Comparison of four different NSPs in the assessment of continuous span bridges
4.3.4  Case study 4: Performance-based seismic assessment of simply supported
deck bridges

4.4  Experimental evaluation of analytical methods
4.4.1  Applicability of analytical methods to the seismic analysis of RC bridge, experimentally tested on three shake tables
4.4.2  Numerical studies of RC bridge, supported by hollow box columns, which was tested pseudo-dynamically

5  Conclusions and Recommendations
Andreas J. Kappos and Tatjana Isaković 

Index