Dynamic performance of timber buildings is a very important issue from both safety and serviceability aspects. Due to their inherent lightweight nature timber buildings attract lower seismic forces than their steel or concrete counterparts. While this is generally a positive aspect from the seismic performance point of view, timber buildings could experience larger dynamic oscillations when excited by strong winds. Consequently, dynamic performance of timber buildings is a complex topic that needs to be properly addressed during the design process. Participants of the workshop will have the opportunity to be informed and discuss the latest research and technical innovations related to dynamic performance of timber buildings with a number of world-renowned experts in this field. The workshop consists of a total of nine presentations of either a standard type (20-minute presentation followed by a 10-minute question period) or a condensed type (10-minute presentation followed by a 5-minute question period).

The workshop begins with a summary on the experimental performance and codification of post tensioned mass timber rocking wall systems in the US. This will be followed by a presentation on low-damage seismic technologies used on a full-scale 2 storey experimental timber structure. Both presentations have a standard duration. Next three presentations deal with the performance of mass timber buildings subjected to wind motions. The first one is on modelling and measurements of wind-induced vibrations in tall timber buildings, while the second focuses on experimental modal analysis on a seven-storey timber building. The third one deals with optical identification and modeling of timber buildings that were part of a research project in France. First two wind-related presentations will be condensed, while the third one will have a standard duration.

The sixth presentation in this session is a standard one, and summarizes the main aspects of the performance-based seismic design of steel and reinforced concrete frames with CLT infill walls. The workshop continues with a session of three condensed presentations related to the seismic performance of balloon mass timber walls. The first one deals with experimental investigation on different balloon-framed CLT shear wall designs, while the second provides information on the seismic performance of balloon CLT walls with high-capacity screwed hold-downs. The final presentation provides information on steel-timber composite walls with high-performance shear connectors.

Participants

Marjan Popovski, Lead Scientist, Building Systems, FPInnovations

Moderator

14:00 – 14:10

Marjan is a Lead Scientist in the Building Systems Group at FPInnovations. He is also an Adjunct Professor at the Department of Wood Science at the University of British Columbia, and at the Centre for Integrated Wood Design, at the University of Northern British Columbia.

Marjan has 35 years of research and technical experience in seismic performance of buildings, specializing in mass timber buildings. He is an author and co-author of over 200 scientific and technical publications, textbook chapters, and special publications such as the Canadian Technical Guide for the Design of Tall Wood Buildings, two editions of the Canadian CLT Handbook, and the Canadian Technical Guide for Mid-rise Wood Frame Construction. He has been on the forefront of the introduction of CLT as structural material and system in Canada.

Over the years Marjan has been member of several Canadian and International Technical Committees (TCs), including CSAO86, the Canadian TC on Engineering Design in Wood, the National Building Code of Canada Standing Committee on Earthquake Design, and the Canada-Japan-USA Building Experts Committee.

Hiroshi Isoda, Professor, Kyoto University

Moderator

14:00 – 14:10

Dr. Hiroshi Isoda received his PhD in the Faculty of Engineering from the University of Tokyo in 1995. From 1990 to 1995, he was a Faculty member and an Assistant Professor in Architecture and Civil Engineering at Shinshu University where he taught Structural Engineering. He moved to the Building Research Institute (BRI), National Institute of Japan, as a Senior Researcher in 1995, where he was involved in the revision of the Japanese Building Standard Law. In 2000-2001, he was also a Visiting Researcher in the Department of Structural Engineering at the University of California in San Diego, where he analyzed the seismic response of four index wood buildings within the FEMA-funded CUREE-Caltech Woodframe Project. In 2006, He was a Visiting Researcher in the Department of Civil, Structural, and Environmental Engineering at the State University of New York at Buffalo where he was involved in the shaking table tests of the NEESWood Project. He moved to Shinshu University as an Associate Professor in 2006 and was elevated to a Professor in 2011. He moved to Kyoto University in 2013. He is now a Professor in the Laboratory of Timber Science and Engineering at the Research Institute for Sustainable Humanosphere of Kyoto University.

Shiling Pei, Colorado School of Mines

Experimental Performance and Codification of Post-Tensioned Mass Timber Rocking Wall Lateral System

14:10 – 14:40

Dr. Shiling Pei received his Ph.D. in Civil Engineering from Colorado State University in December 2007 and joined the faculty of Civil and Environmental Engineering at Colorado School of Mines in Fall 2013. His research focused on traditional and innovative timber systems, performance-based engineering, structural dynamics, and large-scale testing. Dr. Pei received the 2012 ASCE Raymond C. Reese Research Prize for his work on a full-scale 7-story wood-steel hybrid building test at Japan’s E-defense shake table. He led the NHERI TallWood Project and completed shake table test of a full-scale 10-story mass timber building, which earned him recognition by Engineering News-Record as one of the 25 News Makers in 2023. Dr. Pei currently chairs the ASCE Technical Committee on Wood Design, and manages an Open Forum for timber engineering at https://timberengineering.org

Pierre Quenneville, University of Auckland

Low-Damage Seismic Technologies and Test Results on a Full-Scale 2-Storey Timber Structure

14:40 – 15:10

Pierre is Professor of Timber Design at the University of Auckland and Chief Technical Officer at Tectonus. He served as the Head of the Department of Civil and Environmental Engineering from 2011 to 2017. A structural engineer specializing in timber structures, Pierre’s expertise is with timber connections. His work on timber connections under earthquake loads led his research group to develop a resilient damper that re-centres buildings, reducing the need to demolish buildings following an earthquake event. He co-founded Tectonus in 2016 to commercialise the resilient damper and conducted R&D to demonstrate the damper advantages in steel, concrete and timber buildings (for new builds and retrofits). The resilient damper is in use in buildings in New Zealand, in Canada and under consideration for building projects in the USA and Japan.

Marie Johansson, Researcher, RISE Research institute of Sweden

Wind-Induced Vibrations in Tall Timber Buildings: Modelling and Measurements

15:10 – 15:25

Marie Johansson has been working as a researcher at RISE since 2014. Her research areas at RISE have mainly been timber engineering, such as tall timber buildings, connections, prefabrication and material properties. Marie was the project coordinator for the international project DynaTTB – Dynamic Response of Tall Timber Buildings under Service loads as well as several national projects regarding Tall Timber buildings. She has a PhD from Chalmers University of Technology, Sweden and has been Professor in Building Technology at Linnaeus University.

Andreas Linderholt, Engineer, Linnaeus University

Experimental Modal Analysis on a Seven-Storey Timber Building

15:25 – 15:40

Andreas Linderholt has been working at the Department of Mechanical Engineering at Linnaeus University since 2010. His research area is numerical and experimental structural dynamics. Except for applications within mechanical engineering, Linderholt’s research has also been on wind induced vibrations of timber buildings. Andreas holds a PhD from Chalmers University of Technology, and has been working in the industry for several years.

Thomas Catterou, Institut Technologique FCBA

Optical Identification and Modeling of the Nonlinear Dynamics of Timber Buildings – DYNATIMBEREYES Project

16:10 – 16:40

For more than six years, I have worked at the FCBA as a research engineer and research coordinator of the timber construction department. Specialising in civil engineering and structural mechanics, my doctoral thesis focused on dynamics and finite element analysis. At the FCBA, I lead projects on seismic behaviour of buildings, non-destructive testing, vibrations in lightweight floors and modelling of timber structures.

Hiroshi Isoda, Professor, Kyoto University

Performance-Based Seismic Design of Steel and Reinforced Concrete Frames with CLT Infill Walls

16:40 – 17:10

Thomas Tannert, Professor, University of Northern British Columbia

Experimental Investigation of Different Balloon-Framed CLT Shear Wall Designs

17:10 – 17:30

Thomas Tannert joined the University of Northern British Columbia in 2016 as BC Leadership Chair in Tall and Hybrid Wood Construction. He received his Ph.D. from UBC, a Master’s degree in Wood Science and Technology from the University of Bio-Bio in Chile, and a Civil Engineering degree from the Bauhaus-University Weimar in Germany. Before going to UNBC, he worked in multi-disciplinary teams in Germany, Chile, and Switzerland and at UBC Vancouver. Dr. Tannert holds a Canada Research Chair and is a member of the executive of the technical committee for CSA O86 “Engineering Design in Wood”.

Minghao Li, Associate Professor, University of British Columbia

Seismic Performance of Balloon-Type CLT Shear Walls with High Capacity Screwed Hold-Downs

17:30 – 17:50

Dr. Li was trained as a structural timber engineer. Before joining UBC Wood Science, he was an associate professor at the University of Canterbury in New Zealand. He has researched extensively on high-performance engineered wood products and connection systems, multi-storey mass timber and timber-steel hybrid structures. He has a strong interest in developing robust and innovative timber building solutions via experimental, analytical and numerical techniques.