Recent research led by Mostafa Farajian from the Faculty of Civil Engineering at Semnan University in Iran sheds light on a critical yet often overlooked aspect of modular construction: the inter-connections that bind prefabricated units. As the construction industry increasingly embraces modular buildings for their efficiency and speed, understanding the nuances of these inter-connections could significantly impact their seismic performance and overall structural integrity.
Modular construction has gained traction for mid to high-rise buildings, where factory-produced units are transported to the site and assembled. However, the unique inter-connections that form the backbone of these structures have not been extensively studied, particularly regarding their influence on lateral performance during seismic events. Farajian’s study aims to fill this gap by investigating how variations in the stiffness of these connections affect the lateral capacity of braced-frame modular buildings.
Through nonlinear static analysis of three different frame heights—four, eight, and twelve stories—Farajian and his team evaluated various inter-connection stiffness properties. The results are telling: a decrease in the stiffness of these inter-connections can lead to a reduction in lateral capacity and an increase in the structure’s period, which may range from 3.63% to 10.35% depending on the height of the building. Furthermore, the analysis revealed that increased flexibility in inter-connections could reduce base shear by 1.9%, a crucial factor in designing buildings that can withstand seismic forces.
“This research highlights the importance of considering inter-connection characteristics in the design process of modular buildings,” Farajian stated. “As modular construction becomes more prevalent, understanding these dynamics can lead to safer and more resilient structures.”
The implications of this research extend beyond academic discourse; they resonate within the commercial realm of the construction industry. As developers and contractors strive for efficiency and safety in their projects, insights into inter-connection performance could inform better design practices, potentially leading to reduced costs and enhanced safety measures. The findings could also influence regulatory standards, prompting a shift toward more rigorous testing and evaluation of modular building components.
As the demand for sustainable and efficient construction methods rises, this research published in the ‘Journal of Rehabilitation in Civil Engineering’ (translated from Persian) could pave the way for innovations in modular design. By prioritizing the analysis of inter-connections, the construction sector may not only enhance the structural performance of modular buildings but also bolster public confidence in their safety during seismic events.
For more information on this research and the work of Mostafa Farajian, visit lead_author_affiliation.