Why this matters now
Under the theme “Structural Concrete 2050: Towards Carbon Neutrality, AI Design, and Robotic Construction”, the congress aimed to foster discussion on sustainability and on the opportunities offered by emerging technologies for the future of structural concrete, while strengthening the bridge between research and practice. In fact, the technical program covered the main topics in the field, such as materials for structural concrete, construction and prefabrication, design and analysis, existing concrete structures, codes, standards, and guidelines.
The problem we explored
The presented paper discussed the results of the research program on HELKA® Column Shoe and HPM® Anchor Bolts for seismic applications. Seismic is a global risk that sets an increasing demand for design requirements for bolted connections. Despite precast construction technology is recognized by the standards, comprehensive design guidelines are still lacking, especially when it comes to seismic loading.
Our core insight
Full-scale tests were carried out on column-foundation subassemblies with Peikko connections to assess the compliance with the current seismic design approaches as well as to highlight the differences between overdesigned and energy dissipating precast connections, which evidence of the behavior has not been investigated thoroughly so far.
Key takeaways
- The experimental investigation showed that HELKA® Column Shoe and HPM® Anchor Bolts can offer suitable solutions for both overdesigned and energy dissipating connections, as per existing design codes
- While both satisfying the requirements for seismic capacity design, the alternative design methods showed differences in construction detailing as well as in the overall performance
- The results set the basis for further investigation aimed at developing system-specific guidelines for a more efficient use of precast construction technology in seismic applications
What this means beyond the event
Peikko confirmed to be a forerunner for bolted connections. The technical manual of HELKA® Column Shoe is now updated according to the outcome of the experimental research so to provide guidance to the designers in the use of overdesigned connections, which is currently the most accepted design method. Basically, the connection shall possess greater strength than the column so that no brittle failures occur and the desired performance is achieved.
Looking ahead
fib Congress represents an event of relevance for professionals and researchers willing to discuss the latest advancements in structural concrete. More than 1000 participants attended the technical sessions, actively discussed and shared experiences during five intense and inspiring days. Following the resonance of such event, Peikko can contribute to the future of concrete structures shaped by the ability to deliver sustainable and efficient precast structures while facing the challenges in seismic areas.
