Open Collections

Ernewein, Benjamin

University of British Columbia

In recent years, the popularity of mass timber buildings has increased in Canada and around the world. Among the types of mass timber elements that are being used to construct these buildings are cross-laminated timber (CLT) panels. This research explores the application of CLT panels as balloon-type shear walls. Balloon-type shear walls extend through multiple storeys and offer potential benefits over platform-type walls. Despite this potential, there are currently no provisions for balloon-type CLT shear walls in CSA O86 or the National Building Code of Canada (NBCC). This thesis proposes a seismic design procedure for balloon-type CLT shear walls using the Equivalent Static Force Procedure (ESFP) in NBCC. An equation to calculate the moment capacity of a wall has been developed as part of the procedure. The study encompasses 24 archetypes which use mixed-angle self-tapping screw hold-downs. The archetypes vary in wall length (3 m and 6 m) and building height (6 to 12 storeys), and are located in three Canadian cities (Montreal, Vancouver, and Victoria). The archetypes were designed with a range of R values ranging from 1 to 4. The archetypes were modelled in OpenSees. To determine which R value results in acceptable performance, the Canadian Construction Materials Center (CCMC) procedure was used. The results from this research provide valuable insights into the seismic performance of balloon-type CLT shear walls and offer guidance to the development of design provisions in CSA O86 and the NBCC.

Text

2024-07-08

Attribution-NonCommercial-NoDerivatives 4.0 International

http://hdl.handle.net/2429/88591

Civil Engineering

University of British Columbia

UBCV

http://creativecommons.org/licenses/by-nc-nd/4.0/