Christian Viau

Christian Viau
Carleton University · Department of Civil and Environmental Engineering

Doctor of Philosophy
www.cviau.ca

About

34
Publications
10,765
Reads
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192
Citations
Citations since 2016
30 Research Items
190 Citations
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
20162017201820192020202120220102030405060
Introduction
I am an assistant professor at Carleton University, in Ottawa, Ontario. My research focuses on the blast effect on structures, as well as force-protection design. Visit my website! www.cviau.ca
Additional affiliations
June 2020 - June 2021
Royal Military College of Canada
Position
  • Professor (Assistant)
July 2017 - April 2020
University of Ottawa
Position
  • Research Assistant
July 2017 - April 2020
University of Ottawa
Position
  • Professor
Education
January 2016 - April 2020
University of Ottawa
Field of study
  • Civil Engineering
January 2014 - December 2015
University of Ottawa
Field of study
  • Civil Engineering
September 2009 - December 2013
University of Ottawa
Field of study
  • Civil Engineering

Publications

Publications (34)
Article
Full-text available
Presented in this paper are the results of an experimental program investigating the out-of-plane behavior of CLT panels under static and blast loading. A total of 18 CLT panels, with panel thicknesses of 105 and 175 mm corresponding to a 3-ply and 5-ply panel, respectively, were investigated with the aim to determine the dynamic increase factor (D...
Article
Full-text available
An experimental program investigating the behavior of glued laminated timber (glulam) assemblies with various bolted connections subjected to simulated blast loading was undertaken. A total of 14 full-scale tests on 137×267-mm glulam members with idealized and realistic boundary conditions were carried out using a shock tube apparatus capable of si...
Article
Full-text available
This paper presents the procedure for the development of energy-absorbing connections (EACs) in glued-laminated timber (glulam) and cross-laminated timber (CLT) assemblies to resist the effects of blast explosions. A probabilistic approach, which ensures that energy dissipation occurs in the ductile connections prior to brittle flexure failure of t...
Article
This paper presents the theoretical development and experimental validation of a two-degree-of-freedom (TDOF) blast analysis software for the purpose of modelling timber assemblies subjected to blast loads. A total of fifty dynamic full-scale experimental tests on various timber assemblies amalgamated from five published studies are summarized and...
Article
Full-text available
Current blast design provisions for wood members are limited and may unintentionally lead to designs that are too conservative or not sufficiently safe. Novel methodologies for the design of light-frame wood stud walls, glulam members, as well as cross-laminated timber (CLT) panels subjected to blast loads are proposed and verified with published e...
Article
Full-text available
This paper presents the results of an experimental and analytical investigation into the behaviour of full-scale glued-laminated timber (glulam) beams and cross-laminated timber (CLT) panels subjected to consecutive shock-tube-simulated blast loads. Superficial crack development was observed in the glulam specimens even when loaded within their ela...
Conference Paper
This study presents the preliminary results of a research program investigating the application of energy-absorbing connections (EAC) in timber assemblies for the purpose of enhancing their energy dissipative capabilities when subjected to blast loading. Different configurations of potential EACs were designed and investigated experimentally under...
Conference Paper
Dynamic analytical methods establishing the behaviour of heavy timber members subjected to blast loads are evaluated and presented in this paper. Simplified models were used to predict the dynamic behaviour in terms of displacement-time history and failure mechanism of full-scale glued laminated timber and cross-laminated timber elements. The input...
Conference Paper
An increase in the exposure of structures to accidental and intentional blast explosions over the last three decades has led to a desire to increase our understanding of blast load effects on structures. High magnitude, short duration loading events, such as blast explosions and impacts, have the potential to generate catastrophic effects on infras...
Conference Paper
This paper presents the results of an experimental program investigating the effects of repeated dynamic blast loading on the behaviour of glued laminated timber (glulam) beams and cross-laminated timber (CLT) panels. The specimens were subjected to a total of eight dynamic four-point bending tests using the University of Ottawa Shock Tube Test Fac...
Article
An experimental program was undertaken to investigate the flexural performance of forty-eight unreinforced and glass fibre-reinforced polymer (GFRP) reinforced Spruce-Pine-Fir No. 2 grade individual wood studs. In general, it was found that the GFRP contributed to reducing the damage region, especially when both reinforcement and confinement were u...
Conference Paper
Full-text available
The paper presents an investigation of the behaviour of glulam assemblies with bolted connections when subjected to simulated blast loading. Static characterization of the bolted joints as well as dynamic testing of the glulam members in isolation was undertaken prior to the dynamic testing of the assemblies. The investigation consisted of varying...
Conference Paper
Full-text available
The results of an experimental program, designed to investigate the influence of high strain rate effects on the yield strength and stiffness of slender bolted connections, are presented in this paper. Single bolt connections were tested under static and simulated blast loading. Connections in both parallel and perpendicular to the grain directions...
Conference Paper
Full-text available
The preliminary results of an experimental program investigating the flexural blast performance of unretrofitted and glass fibre reinforced polymer (GFRP) retrofitted individual studs and light-frame wood stud walls are presented in this paper. Two retrofit configurations were investigated, namely a simple tension laminate and a U-shaped laminate e...
Conference Paper
Full-text available
This paper presents the results of a study investigating the use of energy-absorbing connections designed as part of mass-timber assemblies to help resist a potential blast loading. Cross-laminated timber and glued laminated timber assemblies, including connections developed specifically to optimize the energy-absorbing capabilities of the system,...
Thesis
Full-text available
The majority of research on high strain-rate effects in timber structures has been limited to the study of the load-bearing members in isolation. Limited work has been conducted on timber connections and full-scale timber assemblies under blast loading, and these have generally been constrained to qualitative observations. In North America, the inc...
Article
This paper presents the experimental findings from a research program investigating the blast performance of cross-laminated timber (CLT) panels with idealized and realistic boundary conditions. A total of twenty-seven static and simulated blast tests were undertaken on 5-ply CLT panels with the aim to quantify the high strain-rate effects in the c...
Conference Paper
Full-text available
This paper reports on the experimental results from a research program investigating the blast performance of cross-laminated timber wall panels with idealized and realistic boundary conditions. Quasistatic and dynamic testing on component-level specimens was conducted in order to quantify the effects of simulated blast loads. Dynamic testing was c...
Conference Paper
Full-text available
Several existing studies, investigating the performance of heavy timber assemblies with realistic boundary conditions, have concluded that using simplified modelling tools such as single-degree-of-freedom (SDOF) modelling may not be sufficient to adequately describe their behaviour and predict the level of damage observed during blast events. A two...
Conference Paper
Full-text available
The results of an experimental program designed to investigate the influence of high loading rates on the dowel embedment strength and stiffness of bolted connections are presented in this paper. A total of seventeen single bolt connections were tested under static and blast loading. Connections both parallel and perpendicular to the grain were tes...
Conference Paper
Full-text available
This paper presents the results from an experimental program investigating the out-of-plane behaviour of cross-laminated timber (CLT) panels under static and simulated blast loading. A total of eighteen CLT panels were investigated with the aim to determine the dynamic behaviour of CLT panels. Dynamic testing was conducted through the use of simula...
Conference Paper
Full-text available
This paper presents a recent study which investigated the effects of realistic boundary conditions on the behaviour of cross-laminated timber (CLT) panels when subjected to out-of-plane blast loads. Experimental testing was conducted at the University of Ottawa Blast Research Laboratory, where shock waves were generated and applied through the use...
Conference Paper
Full-text available
An experimental program investigating the behaviour of glulam beams and columns under high strain rates subjected to simulated blast loading was undertaken. Key observations from the full-scale tests such as the dynamic increase factor (DIF) and failure modes are presented in this paper. A DIF of 1.14 was found to be present only in the absence of...
Article
Full-text available
Currently, no systematic approach exists for damage evaluation of light-frame wood structures subjected to blast loading. This paper presents a detailed assessment of the behaviour of thirty-three full-scale light-frame wood stud walls subjected to a total of forty-eight shots of simulated blast loading. Detailed documentation of the observed damag...
Conference Paper
Full-text available
This paper presents the findings from a comprehensive study aiming to investigate possible failure modes in light-frame wood stud walls subjected to simulated blast loads. Prior to construction and testing of the full-scale wall specimens, material properties were determined and used as input in a proposed material predictive model. The model takes...
Conference Paper
Full-text available
This paper presents the results of a study with focus on the performance of typical North American light-frame wood stud walls including the effect of wall-to-floor/wall-to-roof connections when exposed to simulated blast loads. Prescriptive detailing in the design code as well as four different types of connection options deemed suitable to resist...
Article
Full-text available
An understanding of the behavior of wood stud walls in a region corresponding to hazardous-blowout damage levels is currently lacking. The focus of the current study is on investigating the flexural response of full-scale wood stud walls subjected to pressure-impulse combinations that would yield severe damage levels. Static material properties wer...
Article
Full-text available
The performance of light-frame wood stud walls under simulated blast loading has so far been limited to investigating the behaviour of structural elements with idealized boundary conditions. The current study investigates, experimentally and analytically, whether walls with prescriptive connection detailing for low and high seismic and wind regions...
Thesis
Full-text available
Most of the research on high strain rate effects on wood since the 1950s has been on impact loading. Very limited work has been conducted on full-scale wood specimens under blast loading. In North America, the prevalence of these structures makes them susceptible to unintended blast effects. The question on how to retrofit and protect these structu...
Conference Paper
Full-text available
The question on how to retrofit and protect light-frame wood structures against blast loads remains unanswered and design provisions for new wood structures against blast are not yet comprehensive. Far-field explosion effects were simulated using the University of Ottawa shock tube in order to investigate stud wall response for hazardous and blowou...
Conference Paper
Full-text available
Damage level descriptions reflective of the behaviour of light-frame wood stud walls subjected to blast loading were proposed. The experimental investigation and documentation of the damage levels show that ductility ratios currently published in the blast design code for wood structures may not be appropriate. Ductility ratios of 1, 1.5, and 2 wer...
Poster
Full-text available
Summarizes the experimental program of my MASc research work.
Conference Paper
Full-text available
An extensive body of research is currently available on the behaviour of concrete and steel structures when subjected to blast threats, however, little to no details on how to address the design or retrofitting of wood structures are available. In this paper, preliminary results, both experimental and analytical, are presented on the flexural behav...

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Cited By

Projects

Projects (2)
Project
Develop material predictive models to allow effective blast design and retrofitting of heavy timber assemblies, with emphasis on maximizing system ductility.
Project
Understanding the behaviour of light-frame wood stud walls when exposed to simulated blast loading.