In the quest for sustainable and resilient construction materials, mass timber has emerged as a strong contender, particularly in the face of climate change adaptation policies and net zero carbon targets. However, its application in seismically active regions has been hampered by uncertainties surrounding its seismic behavior and the limited ductility of conventional connections. A recent study published in the journal *Resilient Cities and Structures* (which translates to English as “Resilient Cities and Structures”) sheds light on how innovative friction connections could revolutionize the seismic performance of mass timber buildings, offering a promising solution for the energy sector and beyond.
The study, led by Ashkan Hashemi from the Department of Civil and Environmental Engineering at the University of Auckland, New Zealand, delves into the performance of mass timber buildings equipped with both conventional and self-centering friction devices. Conventional timber connections often suffer from stiffness and strength degradation under cyclic loads, making them less than ideal for earthquake-prone areas. “The use of friction connections can be an efficient way to mitigate these issues,” Hashemi explains. “They are economical and provide a high level of reliable and continuous energy dissipation.”
The research highlights that friction connections can significantly enhance the seismic performance of timber structures. These connections offer a superior alternative by providing self-centering behavior, which allows the structure to return to its original position after an earthquake. This is a game-changer for the construction industry, particularly in regions with high seismic activity. “Friction connections can provide a superior seismic performance for timber structures,” Hashemi notes. “However, they may need to be combined with a parallel system to avoid residual displacements.”
The study compares the seismic performance of mass timber buildings equipped with both conventional and self-centering friction connections, focusing on key indicators such as base shear, response drifts, and response accelerations. The findings suggest that while friction connections offer numerous advantages, they may need to be complemented with additional systems to ensure optimal performance.
The implications of this research are far-reaching for the energy sector, where sustainable and resilient construction materials are increasingly in demand. As the world shifts towards net zero carbon targets, the use of mass timber in construction is expected to grow. The adoption of innovative friction connections could not only enhance the seismic resilience of these structures but also contribute to the overall sustainability of the built environment.
This study provides valuable insights into the future of mass timber construction, particularly in seismically active regions. As the construction industry continues to evolve, the integration of advanced technologies and materials will be crucial in meeting the challenges posed by climate change and seismic activity. The research by Hashemi and his team offers a promising path forward, paving the way for more resilient and sustainable buildings.