New Timber Technology Paves Way for More Earthquake Resilient Buildings
Engineers at the University of Auckland have successfully tested a new modular timber building system designed to be more earthquake resilient. Utilizing cross-laminated timber, this technology allows structures to withstand extreme shaking and self-centre, offering a sustainable way to minimize post-quake damage.
Highlights
- •Researchers at the University of Auckland successfully tested a timber-based modular structure against earthquake-like forces.
- •The tested cross-laminated timber (CLT) design features a self-centring system that helps buildings recover from seismic shaking.
- •Engineered timber is being explored as a sustainable, low-carbon alternative to traditional construction materials like concrete and steel.
- •The research aims to reduce post-earthquake repair costs and structural displacement in medium-density housing.
Recent seismic activity, including the magnitude 7.8 earthquake that impacted the Philippines, has once again underscored the urgent need for earthquake resilient buildings. While modern construction codes focus heavily on life safety, the aftermath of major tremors often reveals a sobering reality: many structures are rendered unusable due to significant damage, leading to costly repairs or complete demolition.
For structural engineers, the priority is shifting toward designs that not only protect occupants but also ensure the infrastructure can withstand extreme forces with minimal disruption. Addressing this challenge is crucial, especially as the global construction industry faces mounting pressure to reduce its carbon footprint and adopt sustainable practices.
Innovative Timber Technology for Seismic Resilience
A promising solution involves the use of engineered mass timber, such as cross-laminated timber (CLT). This material offers a renewable, low-carbon alternative to traditional concrete and steel. Beyond its environmental benefits, recent research from the University of Auckland highlights its potential for creating earthquake resilient buildings that can effectively bounce back after intense shaking.
The research team developed a unique system that allows different storeys of a building to move independently during an earthquake. This controlled movement dissipates energy and reduces the overall strain on the structure. Crucially, the system features a self-centring capability, helping the building return to its original position once the seismic activity concludes.
To validate this technology, researchers conducted a full-scale test on a two-storey modular CLT structure using a specialized shake table. By applying weights to simulate a three-storey building, they subjected the model to a series of rigorous tests replicating various earthquake scenarios. The results were highly encouraging: the connection system successfully absorbed energy, protecting the main timber frame from structural damage.
Furthermore, the building successfully returned to its original position post-simulation, indicating a significantly higher likelihood of continued occupancy and reduced repair requirements following a real-world event. This advancement represents a meaningful step toward developing sustainable, modular urban housing that prioritizes both environmental goals and long-term structural integrity.
The next phase of this development will focus on integrating this technology into complete building systems and evaluating its long-term viability. As urban areas continue to face both seismic risk and the necessity of sustainable development, such innovations provide a pathway toward creating cities that are safer, more resilient, and better prepared for the future.
