Pre-Design of a Modular Footbridge System with Pre-tensioned CFRP Reinforcement

A common problem of concrete bridges are corrosion damages of the steel reinforcement. The related loss of capacity as well as visual effects often require expensive and elaborate refurbishment or even reconstruction. To overcome these drawbacks, a modular footbridge system without steel reinforcement is developed. The application of non-corrosive carbon fiber reinforced polymer (CFRP) reinforcement is suitable for building slender constructions, which are durable and longlasting. For the elements of the modular bridge system CFRP reinforcement is applied as mesh fabrics and pre-tensioned rebars. In this paper, the dimensioning and pre-design of the modular footbridge system are presented. In a first step, the requirements regarding cross-sections, spans and level of prestressing are defined based on natural conditions and applied loads. In a second step, the flexural pre-design of the pre-tensioned footbridge is explained exemplarily. In a final step, the dynamic behavior of the designed concepts is analyzed.

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