Climate-resilient railway bridges: From long-term monitoring to adaptive management

Climate change is creating new challenges for railway infrastructure in cold regions, where larger temperature variations, heavier precipitation, and more frequent freeze–thaw cycles affect bridge performance and durability. In this project, researchers at Luleå University of Technology investigate how climate-related changes influence the structural behaviour and stability of railway bridges over time. Through advanced long-term monitoring and predictive modelling, the project develops knowledge and practical tools that support more proactive maintenance and climate-adaptive management of future railway infrastructure.

Background

Climate change is increasing environmental challenges for railway infrastructure in cold regions, including larger temperature variations, heavier precipitation, and more frequent freeze–thaw cycles. Railway bridges in northern Sweden are particularly vulnerable to these effects, which may reduce structural reliability, increase maintenance demands, and introduce safety risks. However, current engineering guidelines do not adequately consider how changing climate conditions influence bridge structural performance and support conditions over time.

To address this knowledge gap, the Structural Engineering research group at Luleå University of Technology has conducted long-term monitoring of the Svartbäcken and Vitån railway bridges. Environmental conditions and structural responses have been measured simultaneously over more than two years. The monitoring revealed that snowmelt water can infiltrate and refreeze within the ballast and surrounding soil, temporarily stiffening the bridge supports and altering boundary conditions. This phenomenon causes measurable changes in bridge dynamic behavior and load distribution, representing a previously underexplored climate–structure interaction.

Aim and objectives

The aim of this project is to transform detailed climate-response knowledge into practical solutions for bridge management, with the overarching aim of strengthening the clime resilience of Sweden’s railway bridges and, by extension, its transport system.

The objectives are to develop validated statistical and finite-element predictive models to quantify the effects of climate change on railway bridge structural performance; to develop practical decision-support tools and engineering guidelines for proactive bridge maintenance, inspection, and operational management under changing climate conditions; to enhance the resilience, safety, and sustainability of railway bridge infrastructure by enabling a transition from reactive maintenance to anticipatory climate-adaptive infrastructure management

Dissemination