Structural Robustness: Design Framework for Enhanced Robustness
摘要
Structural robustness refers to the ability of a structure to withstand unforeseen adverse events without being damaged to an extent disproportionate to the original cause. Robustness design strategies include redundancy and segmentation, which are assessed based on threat-independent scenarios. Redundancy provides alternative load paths (ALP) to bypass damaged components, while segmentation isolates damaged areas to prevent failure progression. Current design guidelines categorize buildings by importance and risk levels to determine robustness requirements, and propose appropriate design strategies. These strategies must take into account the brittle failure modes and high variability of mechanical properties of timber members, and the often limited deformation capacity of timber connections, amongst other aspects. Case studies show various implementations of such strategies.