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American Society of Civil Engineers

Publications associées (18)

Cyclic Load-Transfer Approach for the Analysis of Energy Piles

Lyesse Laloui, Melis Sütman

Energy piles, due to their unique roles of coupling the structural support and heat exchange with the surrounding ground, are subject to temperature cycles during their lifetime. Although their behaviour during individual temperature increase or decrease h ...

ASCE-AMER SOC CIVIL ENGINEERS2019

Particle-Based Numerical Manifold Method to Model Dynamic Fracture Process in Rock Blasting

Jian Zhao, Qianbing Zhang, Xing Li

A particle-based numerical manifold method (PNMM) is developed to investigate rock fracturing behavior under dynamic loading. The basic idea of PNMM is to represent the microstructure of rock with a group of particles and to simulate the macroscopic behavi ...

Asce-Amer Soc Civil Engineers2017

Pull-Out Behavior of CFRP Single-Strap Ground Anchors

Thomas Keller, Anastasios Vassilopoulos, Haifeng Fan

Pull-out experiments were performed on four carbon fiber-reinforced polymer (CFRP) ground anchors simulating their applications in rock and soil. The CFRP tendons used in these anchors comprise a single-strap end on both ground and air sides. On the ground ...

American Society of Civil Engineers2017

Recent development in the multiphysical analysis and design of energy piles

Lyesse Laloui, Alessandro Francesco Rotta Loria

This study proposes an analysis of the multiphysical phenomena governing the thermo-mechanical behaviour of energy piles. The analysis is based on the results of a series of full-scale in-situ tests, laboratory experiments and numerical analyses. First, th ...

2017

Approaches to reduce friction losses in headrace waterways of hydropower plants

Anton Schleiss, Michael Pfister, Helena Isabel Dos Santos Nogueira

Forum papers are thought-provoking opinion pieces or essays founded in fact, sometimes containing speculation, on a civil engineering topic of general interest and relevance to the readership of the journal. The views expressed in this Forum article do not ...

Asce-Amer Soc Civil Engineers2016

Redesigning Water Distribution Networks Using a Guided Evolutionary Approach

Anton Schleiss, José Pedro Gamito de Saldanha Calado Matos

The paper describes and discusses the application of a guided evolutionary approach for the optimization of water distribution networks. Initially developed for the Battle of the Water Networks II (BWN-II), the approach was adapted and improved for competi ...

American Society of Civil Engineers2016

Microstructural Modeling of Early-Age Creep in Hydrating Cement Paste

Karen Scrivener

This paper presents a new approach to model the creep behavior of cement paste at early ages. The creep behavior is simulated by applying a time-varying generalized Maxwell model on the individual elements of a finite-element mesh of a simulated three-dime ...

Asce-Amer Soc Civil Engineers2016

Geotechnical analysis of energy piles

Lyesse Laloui, Alessandro Francesco Rotta Loria

This study proposes an analysis of the multiphysical phenomena and mechanisms governing the thermo-mechanical behaviour of energy piles. The analysis is based on the results of a series of full-scale in-situ tests, laboratory experiments and numerical anal ...

2016

Sediment Evacuation from Reservoirs through Intakes by Jet-Induced Flow

Anton Schleiss, Giovanni De Cesare, Jolanda Maria Isabella Jenzer Althaus

Reservoir sedimentation is considered as a sustainability problem. A concept getting down to the root of the cause was developed and tested in laboratory experiments. The idea is to maintain sediment in suspension, i.e., avoiding its settling near the dam ...

American Society of Civil Engineers2015

Deployment of a tensegrity footbridge

Ian Smith, Nicolas Willy Veuve, Seif Dalil Safaei

Deployable structures are structures that transform their shape from a compact state to an extended in-service position. Structures composed of tension elements that surround compression elements in equilibrium are called tensegrity structures. Tensegritie ...

Asce-Amer Soc Civil Engineers2015

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

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

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

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

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

Thomas Keller, Christian Ludwig, Yu Bai

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