BIOMEMETIC SEISMIC BRIDGE DESIGN INSPIRED BY HUMAN SKELETAL STRUCTURES

The remarkable combination of strength, flexibility and damage tolerance found in the human skeletal system offers valuable design strategies for earthquake-resistant bridges. In particular, the spinal column a stack of rigid vertebrae separated by compliant discs and ligamentous connections carries heavy loads while absorbing shocks. This paper presents an expanded framework for translating these biomechanics into concrete bridge design. We discuss modeling advances for segmented columns (as “vertebrae” with interlayer bearings) and joint systems (mimicking synovial articulation) to improve seismic damping. We also examine bone-inspired material architectures: concrete with internal voids or fiber layouts analogous to trabecular bone can deflect cracks and enhance toughness. Using finite-element simulations, we model bridge piers as series of concrete blocks connected by elastomeric cushions and sliding joints decks are modeled with ball-and-socket bearings for multi-directional flexibility. A 3D model of human vertebrae with discs and ligaments (Figure 2) served as an analog for calibrating these elements. Results from prior studies indicate that hybrid sliding-rocking columns (inspired by limb joints) sustained minimal damage under extreme shaking. Similarly, bone-like tubular concrete (osteon-architectured) resists crack growth stepwise, delaying failure. This suggests that a “skeletonized” bridge with segmented supports, articulated bearings, and structured concrete could disperse seismic energy and remain repairable after strong earthquakes. Our methodology section outlines how biological parameters (bone stiffness, ligament viscoelasticity) inform the design of elastic joints and multi-block column models. In discussion, we compare the performance of biomimetic versus conventional bridges using cited computational results. Overall, integrating skeletal motifs – modular vertebrae, cushioning “discs,” and fiber-reinforced voided concrete promises bridges that are simultaneously strong, ductile, and energy-absorbing. This draft review synthesizes recent insights (2021–2024) in biomechanics and civil engineering, and proposes directions for experimental validation and optimization.