City Research Online

Abstract

Modular construction has emerged as a promising approach to address challenges in the construction industry, such as reducing construction times, improving quality, and enhancing sustainability. Among various modular systems, steel modular building systems (MBSs) stand out for their potential to be disassembled and reused the end of their life cycles, contributing to a circular economy in the built environment. However, the seismic resilience of these structures, particularly in mid- and high-rise buildings, poses significant challenges, largely due to the mechanical behaviour of inter-module connections (IMCs).

This doctoral research investigates a novel hybrid inter-module connection (IMC) designed to enhance the seismic resilience of steel modular buildings while preserving their reusability. The research begins with a comprehensive review of existing IMCs, identifying the core design features and limitations in current configurations. Key materials, such as high-damping rubber and shape-memory alloys, are selected to address the shortcomings in energy dissipation and reduce inelastic deformations.

The proposed hybrid IMC concept integrates these materials into a practical design that offers both structural robustness and ease of assembly and disassembly. A series of finite element analyses (FEA) is conducted to optimise the IMC design, focusing on its mechanical performance under seismic loading conditions. These simulations are complemented by experimental validation through meso-scale cyclic testing, adhering to the FEMA/SAC loading protocol. The results demonstrate that the hybrid IMC can significantly improve the seismic resilience of steel modular buildings, limiting plastic deformations in critical members and minimising residual drifts, thereby ensuring the demountability and reusability of the modules post-earthquake.

The findings of this research contribute to the advancement of modular construction technology by offering a seismic-resistant IMC that aligns with sustainability goals. The hybrid IMC not only addresses current limitations in seismic design but also promotes the broader adoption of steel modular buildings in seismically active regions, supporting rapid urban development while maintaining environmental and economic benefits.

Publication Type:	Thesis (Doctoral)
Subjects:	T Technology T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction
Departments:	School of Science & Technology > Engineering School of Science & Technology > School of Science & Technology Doctoral Theses Doctoral Theses

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