Static performance of a novel precast UHPC corrugated bridge arch under asymmetric loading: Experimental and numerical study

• A rapidly constructible, lightweight, eco-friendly corrugated UHPC arch was proposed. • Formwork adaptable for the corrugated prefabricated component was introduced. • Failure modes of CUC arches under static loading were investigated. • Superior mechanical performance of arch with corrugated thin-walled section was confirmed. • Impact of geometric parameters on load-bearing capacity was studied using FEMA. To address the need for sustainable, simple and elegant bridges that harmonize seamlessly with the natural environment in ecologically sensitive wildlife protection zones, a novel precast Corrugated Ultra-High-Performance Concrete (CUC) arch bridge was proposed in the current study. It combines the benefits of corrugated sections and UHPC material to achieve robust crossing capabilities, adaptable foundations, high corrosion resistance, low maintenance requirements, and minimal ecological disturbance. An innovative mold was developed to streamline the construction of CUC arches. A CUC arch was fabricated using this mold and subjected to a quarter-span concentrated load test to evaluate its structural performance and compare it with that of a conventional reinforced concrete (CRC) arch of identical dimensions. Key performance metrics, including failure modes, load-carrying capacity, and mechanical properties, were evaluated. The results demonstrated that the CUC arch exhibited a ductile four-hinge failure mode under asymmetric loading, significantly enhanced load-bearing capacity and stiffness, and reduced material usage compared to the CRC arch. Finite element analysis was conducted to explore the influence of key design parameters, such as wavelength, wave height, plate thickness and diameter of longitudinal bars to the ultimate bearing capacity. This study provides valuable insights for optimizing CUC arch designs and promoting their widespread adoption in engineering practice.