Experimental investigation of bending stiffness of a novel 54m FRP space truss string bridge

Composite truss has the characteristics of light weight, high strength and full play of the axial mechanical properties of the composite components, which can be applied to form long-span bridges, roof structures et al. A novel 54m space truss string bridge made of pultruded GFRP profiles is proposed in this paper based on the composite pre-tightened tooth connection. The proposed space truss string bridge was fabricated, assembled and tested statically, and the load-displacement responses were recorded. The response of the bridge evidenced a sound carrying capacity, the deformation and stiffness of the space truss string bridge meet the requirements and can be used for bridge repair in emergency situations.