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Suspension Bridge (suspension + bridge)

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Engineering100%

Selected Abstracts

Performance-based seismic analysis and design of suspension bridges

EARTHQUAKE ENGINEERING AND STRUCTURAL DYNAMICS, Issue 4-5 2005
Serafim Arzoumanidis
Abstract This paper presents a performance-based seismic analysis and design of a large suspension bridge, the new Tacoma Narrows Parallel Crossing in the State of Washington. The scope of the project included establishment of design criteria, extensive analysis and validation of the design. The analysis was performed using detailed three-dimensional models that included geometric and material non-linearity. The target post-earthquake level of service was verified using stress, deformation and ductility criteria. In the absence of well-established criteria, which relate the structural response of tower shafts to specific levels of performance, capacity analyses were performed to demonstrate that the design fulfills the performance objectives. The seismic analysis and design of this bridge was reviewed throughout the design process. An independent check team also performed separate analysis and validation of the design. Thus, this bridge constitutes an example of a large-scale design project where the performance-based seismic design procedures underwent rigorous assessment. This work demonstrated that the performance-based approach for seismic design is an appropriate way for designing earthquake-resistant structures. Further data that relate the structural response with the performance objectives are necessary. Copyright © 2005 John Wiley & Sons, Ltd. [source]

A simplified method for lateral response analysis of suspension bridges under wind loads

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING, Issue 8 2006
Jin Cheng
Abstract A simplified method for analysing lateral response of suspension bridges under wind loads is proposed in this paper. The geometric non-linearity in the deflection theory and the three components of displacement-dependent wind loads are taken into account in the method. The analytical formulas for calculating the torsional, vertical, and lateral responses of suspension bridges under wind loads are derived. An iterative procedure, which has a high convergence rate for solving the problem, is developed. The proposed method is sufficient and simple to use. Wind-induced lateral response analysis of a long-span suspension bridge demonstrates the proposed method's efficiency and accuracy. Copyright © 2006 John Wiley & Sons, Ltd. [source]

Die Geschichte der San Francisco,Oakland Bay Bridge

BAUTECHNIK, Issue 4 2004
Johannes Springer Dipl.-Ing.
Die Bay Bridge zwischen San Francisco und Oakland ist ein herausragendes Beispiel des amerikanischen Großbrückenbaus. Sie besteht aus einer Zwillingshängebrücke und einer Fachwerkauslegerbrücke, die durch einen Tunnel auf der Insel Yerba Buena verbunden sind. Dieser Artikel beschreibt den Weg von den ersten Vorstudien bis zur heutigen Zeit. Auf die Besonderheiten bei Konstruktion und Bau, z. B. die Stahlbauarbeiten sowie die Gründung des Ankerblocks, welcher die beiden Hängebrücken miteinander verbindet, wird ausführlich eingegangen. Der Beitrag beschreibt außerdem aktuelle Verstärkungsmaßnahmen sowie das geplante Ersatzbauwerk für den östlichen Fachwerkbrückenteil, der aus Gründen der Erdbebensicherheit z. Z. durch eine einhüftige, selbstverankerte Hängebrücke ersetzt wird. The history of the San Francisco,Oakland Bay Bridge. The San Francisco-Oakland Bay Bridge is an eminent example of american bridge engineering. It consists of a twin suspension bridge and a cantilever truss bridge which are connected by a tunnel through Yerba Buena Island. This article describes the way from the feasibility studies to the present time. In addition, it details some specific design and construction features, for example the steel construction work and the foundation of the central anchorage which connects the two suspension bridges. Recent reinforcement measures, and the plans for the replacement of the East Bay Crossing by a self-anchored single tower suspension bridge to improve earthquake safety, are also discussed. [source]

A simplified method for lateral response analysis of suspension bridges under wind loads

INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN BIOMEDICAL ENGINEERING, Issue 8 2006
Jin Cheng
Abstract A simplified method for analysing lateral response of suspension bridges under wind loads is proposed in this paper. The geometric non-linearity in the deflection theory and the three components of displacement-dependent wind loads are taken into account in the method. The analytical formulas for calculating the torsional, vertical, and lateral responses of suspension bridges under wind loads are derived. An iterative procedure, which has a high convergence rate for solving the problem, is developed. The proposed method is sufficient and simple to use. Wind-induced lateral response analysis of a long-span suspension bridge demonstrates the proposed method's efficiency and accuracy. Copyright © 2006 John Wiley & Sons, Ltd. [source]

Die Geschichte der San Francisco,Oakland Bay Bridge

BAUTECHNIK, Issue 4 2004
Johannes Springer Dipl.-Ing.
Die Bay Bridge zwischen San Francisco und Oakland ist ein herausragendes Beispiel des amerikanischen Großbrückenbaus. Sie besteht aus einer Zwillingshängebrücke und einer Fachwerkauslegerbrücke, die durch einen Tunnel auf der Insel Yerba Buena verbunden sind. Dieser Artikel beschreibt den Weg von den ersten Vorstudien bis zur heutigen Zeit. Auf die Besonderheiten bei Konstruktion und Bau, z. B. die Stahlbauarbeiten sowie die Gründung des Ankerblocks, welcher die beiden Hängebrücken miteinander verbindet, wird ausführlich eingegangen. Der Beitrag beschreibt außerdem aktuelle Verstärkungsmaßnahmen sowie das geplante Ersatzbauwerk für den östlichen Fachwerkbrückenteil, der aus Gründen der Erdbebensicherheit z. Z. durch eine einhüftige, selbstverankerte Hängebrücke ersetzt wird. The history of the San Francisco,Oakland Bay Bridge. The San Francisco-Oakland Bay Bridge is an eminent example of american bridge engineering. It consists of a twin suspension bridge and a cantilever truss bridge which are connected by a tunnel through Yerba Buena Island. This article describes the way from the feasibility studies to the present time. In addition, it details some specific design and construction features, for example the steel construction work and the foundation of the central anchorage which connects the two suspension bridges. Recent reinforcement measures, and the plans for the replacement of the East Bay Crossing by a self-anchored single tower suspension bridge to improve earthquake safety, are also discussed. [source]