American Society of Civil Engineers

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Structural identification methods for full-scale bridges

Ian Smith, James-Alexandre Goulet, Irwanda Laory

Results of two doctoral theses, one using a model-based approach and the other using model-free methods, are summarized. Both included case studies of full-scale bridges. While model-based approaches are appropriate for individual infrastructure-management ...

2013

Advanced Numerical Modeling of Cracked Tubular K Joints: BEM and FEM Comparison

Alain Nussbaumer, Luís Costa Borges

A critical aspect in the design of tubular bridges is the fatigue performance of the structural joints. The estimation of a fatigue crack life using the linear elastic fracture mechanics (LEFM) theory involves the calculation of stress intensity factors (S ...

American Society of Civil Engineers2012

Multiresolution Information Mining for Pavement Crack Image Analysis

Rafael Eduardo Carrillo Rangel

Empirical mode decomposition (EMD) is a multiresolution data analysis method recently developed to cater to the inherent nonstationarity in real-world signals. A two-dimensional (2D) extension of EMD is used in this paper as a pavement distress image analy ...

American Society of Civil Engineers2012

Mechanism-Based Approach for the Deployment of a Tensegrity-Ring Module

Ian Smith, Landolf-Giosef-Anastasios Rhode-Barbarigos, Nizar Bel Hadj Ali, Costanza Schulin, René Motro

Tensegrity structures are spatial systems composed of tension and compression components in a self-equilibrated prestress stable state. Although the concept is over 60 years old, few tensegrity-based structures have been used for engineering purposes. Tens ...

2012

The new Swiss Codes for engineering of existing structures

Eugen Brühwiler

The new Swiss Codes for engineering of existing structures. The Schweizerische Ingenieur- und Architektenverein (Swiss Society of Engineers and Architects) introduces the series of Codes SIA 269 as a tool that will provide guidance for their members to sig ...

2011

Das neue Schweizer Normenwerk zum Umgang mit bestehenden Tragwerken

Eugen Brühwiler

Mit der Normenreihe SIA 269 stellt der Schweizerische Ingenieurund Architektenverein seinen Mitgliedern ein Hilfsmittel zur Verfügung, das den Umgang mit bestehenden Tragwerken wesentlich verbessern wird und dabei die Kreativität der Ingenieure herausforde ...

Wiley-Blackwell2011

Fire performance of water-cooled GFRP columns. Part I: Fire endurance investigation

Thomas Keller, Yu Bai, Christian Ludwig

Structural fire endurance experiments were conducted on full-scale cellular glass fiber-reinforced (GFRP) columns under axial compression and subjected to ISO834 fire exposure from one side. Unprotected columns can resist fire for more than 30 min, which i ...

American Society of Civil Engineers2011

Fire Performance of Water-Cooled GFRP Columns. Part II: Postfire Investigation

Thomas Keller, Yu Bai

The postfire mechanical performances of water-cooled full-scale GFRP cellular columns subjected to axial compression were evaluated after exposure to an ISO-834 fire from one side for periods of 60 and 120 mins. The elastic modulus and postfire buckling lo ...

American Society of Civil Engineers2011

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