WIND SERVICEABILITY DESIGN OF TALLER TIMBER BUILDINGS
Presentation of a large in-situ testing campaign of tall timber buildings, their dynamic response and finite element modelling & updating. Dissemination of new design guidelines
Project: Dynamic Response of Tall Timber Buildings under Service Load (DynaTTB)
The Dynamic Response of Tall Timber Buildings under Service Load (Dyna-TTB) project is supported under the umbrella of ERA-NET Cofund ForestValue. Its aim is to quantify the structural damping in as-built tall timber buildings (TTB), identify and quantify the effects of connections and non-structural elements on the stiffness, damping and wind-induced dynamic response of TTBs, develop a bottom-up numerical finite element model for estimating the dynamic response of multi-storey timber buildings, validate the predicted response with in-situ measurements on TTBs and disseminate findings via a TTB Design Guideline for design practitioners.
STATE OF THE ART IN TIMBER SEISMIC DESIGN
Presentation of the most relevant timber seismic design endeavours in USA, Canada and Europe, including the ongoing biggest full scale shaking table test in history.
Project: NHERI Tallwood, Seismic Performance of Mass Timber Systems
The first talk will present the NHERI Tallwood project, an NSF-funded research effort to develop and validate a resilient-based seismic design methodology for tall wood buildings. The project started in September 2016 and will last through 2022. This presentation will begin with a project overview including past testing, analysis, and design of a full-scale 10-story building with post-tensioned rocking wall lateral systems to serve as the seismic force resisting systems and provide re-centering capabilities. The test building will be subject to multiple earthquakes including more than six earthquakes having mean recurrence intervals of 2500 years.
The second talk will introduce the audience to the latest research related to mass timber seismic force resisting systems (SFRSs) at FPInnovations and Canada in general. The efforts in code implementation of various mass timber systems in Canada will also be discussed. Details of a new Canadian Wood Construction Research Network will also be presented.
The third talk will present the two aspects that mainly influence the mechanical behaviour of CLT shear walls: connections and openings. The results of experimental projects recently conducted by CNR-IBE timber research group will be presented and discussed, namely:
1.biaxial connectors; 2. shear-key connectors and 3. mechanical behaviour of CLT shear walls with door or window openings.
VISIBLE MASS TIMBER IN BUILDINGS AND FIRE SAFETY CHALLENGES
Presentation of three recent fire safety project dealing with issues of visible timber during fire situations, the challenges it brings and how to overcome them.
Project: Fire safety challenges of tall wood buildings, Glue line integrity in fire, Fire Safe Implementation of visible mass timber in tall buildings.
New mass timber materials such as CLT have significantly increased the possibilities and popularity of timber as a structural material. Among other things, mass timber materials are often cited for their aesthetic qualities, which is confirmed by strong architectural demands for having visible timber surfaces in buildings. The visible mass timber, however, is a combustible material which introduces new fire safety challenges. This workshop will discuss these challenges, which include the possible influence of mass timber on fire development, burnout resistance and façade exposure. Also, less studied aspects such as fire-fighting challenges and structural damage after a fire will be discussed. The workshop will finally discuss recent research that created knowledge to overcome some of these challenges. An interactive part of the workshop is planned, in which the opinion and background from the audience will be asked anonymously and on voluntary basis. Questions in this interactive section will mostly concern opinions regarding suitable performance goals for buildings of different types.
SERVICE LIFE PERFORMANCE SPECIFICATION OF WOOD
Presentation of a performance-based specification protocol to enable a software tool for architects, specifiers and the public to embed service life performance specification for wood.
Project: Delivering fingertip knowledge to enable service life performance specification of wood (CLICKdesign)
CLICKdesign will develop a performance-based specification protocol to enable provision of a software tool for architects and specifiers to embed service life performance specification for wood. The expected major breakthrough of CLICKdesign is the development of a performance-based specification protocol for wood in construction and enables provision of a software tool for service life performance specification for planners and architects. This major innovation will expand the reach of wood products to new users beyond the small proportion of specifiers who are xylophiles and ‘wood aware’, increasing market confidence with users for wood as a reliable product and expand possibility for new product innovations. This supports the forest sector’s vision to triple market share for wood products and services in construction by 2030. The CLICKdesign tool will facilitate reaching this goal by combining an easy-to-use tool with pedagogic background information.