Aspects of the Design and Construction of Chilean Footbridges

Footbridges are essential for intermodal mobility in Chile, ensuring safe passage over roads, rivers, and railways. Their design must comply with technical and structural safety regulations outlined in the Manual de Carreteras, alongside criteria for functionality, aesthetics, and sustainability. Footbridge typologies and materials have evolved from reinforced concrete to an increasing use of timber, promoting sustainability and adaptability. Universal accessibility is a priority, incorporating gentle slopes, non-slip surfaces, and properly designed handrails. Given Chile’s high seismic activity, structural resilience is crucial, requiring advanced engineering techniques. This paper provides a critical analysis of the historical evolution of Chilean footbridge design and construction, examining how changing priorities, technological advancements, and regulatory updates have influenced their development. Special attention is given to recent innovations, such as the adoption of advanced vibration monitoring systems, which help detect potential structural issues early, thereby extending the lifespan of these vital infrastructures. Additionally, the paper discusses the implications of new slope criteria for accessibility and the challenges of maintaining structural integrity in the face of seismic events