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American Society of Civil Engineers

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Battle of the Water Networks II

Qi Wang, José Pedro Gamito de Saldanha Calado Matos, Marco Franchini

The Battle of the Water Networks II (BWN-II) is the latest of a series of competitions related to the design and operation of water distribution systems (WDSs) undertaken within the Water Distribution Systems Analysis (WDSA) Symposium series. The BWN-II pr ...

American Society of Civil Engineers2014

Hydraulics, Air Entrainment, and Energy Dissipation on a Gabion Stepped Weir

Davide Wüthrich

In the last decades the design of stepped spillways regained some interest because of their suitability with new construction methods including gabions. The hydraulic performances of gabion stepped weirs were investigated experimentally in terms of the flo ...

American Society of Civil Engineers2014

Bio- and Chemo-Mechanical Processes in Geotechnical Engineering

In recent years, substantial advances have been made in understanding the coupling between chemical and biological processes and mechanical and hydraulic behaviours in soils and rocks. At the same time, experimentation and modelling capabilities have progr ...

ICE Publishing2014

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

Dynamic Response of a Chevron Concentrically Braced Frame

Dimitrios Lignos

Large-scale shake table tests were conducted at E-Defense, Japan, to examine the dynamic response of a steel concentrically braced frame. The specimen was a single-bay, single-story frame with a pair of square hollow structural section braces placed in a c ...

American Society of Civil Engineers2013

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

Two-Dimensional DDA Contact Constitutive Model for Simulating Rock Fragmentation

Jian Zhao

Due to the difficulties of fracture mechanics in dealing with multicrack problems, the continuum-based numerical methods always encounter mathematical problems when modeling rock fragmentation, so the alternative discontinuum-based numerical approaches are ...

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