Damping properties of FRP cables for long-span cable-stayed bridges

Abstract

In this study, the damping properties of carbon fiber reinforced polymer (CFRP) and basalt fiber reinforced polymer (BFRP) cable potentially applied in long-span cable-stayed bridges were simulated and evaluated based on experimental data and theoretical derivations. The modal shapes were first identified according to a previous dynamic test on FRP cables, based on which the modal damping ratios of the in-plane vibration were estimated by the structural damping model of mode-dependence. Meanwhile, the modal damping ratios of the out-of-plane vibration were evaluated by the combined Rayleigh and frequency independent damping (CRFID) model. The results show that (1) the modified equation for the modal damping ratio validated by the results of inplane vibration of the steel cable can be used for modeling the damping ratios of FRP cables, (2) the coefficients of dynamic strain damping energy of CFRP and BFRP cables were derived by backward calculating and fitting the experimental data, which can represent the damping difference among each material, and (3) the modal damping ratios of the outof-plane modes of different stayed cables were fitted by the CRFID model and show good agreement with the test results.

Fiber reinforced polymer composites in bridge industry

“…The existing studies on FRP cables include material properties, fatigue performance, vibration characteristics, creep behavior, durability, and damping properties [78,79]. A study showed that the displacements of an FRP cable-stayed bridges are less than those of the steel cablestayed bridge [71].…”

Testing and Evaluation of Flexural Tensile Strength of Prestressed CFRP Cables

“…Carbon fiber-reinforced polymer (CFRP) is recognized in engineering as an ideal substitute for traditional steel tendons in harsh environments [ 1 , 2 , 3 , 4 , 5 ] due to its high strength, light weight, and high corrosion resistance, which can effectively reduce structural weight and improve structural durability [ 6 , 7 , 8 ]. In the 1980s, Japan, the United States, and other countries began to study its engineering applications [ 9 , 10 ] and the U.S. Specification ACI 440.4R-04 [ 11 ] recommends the use of CFRP cables as a prestressing material.…”

Charpy impact properties of uni-directional carbon fiber-reinforced polymer tendons with protective layers

“…In cable-supported bridges, steel cables are generally employed as the main load-bearing components. However, the corrosion of steel cables always leads to premature failure of the bridges, and moreover, the significant sag effect caused by their high self-weight limit the further improvement of the bridge spans (Ren et al, 2019; Yang et al, 2016). Fiber-reinforced polymer (FRP) is a composite material with high strength, light weight, excellent fatigue resistance and inherent durability (Teng, 2001).…”