Aspects of parallel wire cable reliability

Faber, Michael Havbro; Engelund, S.; Rackwitz, R.

doi:10.1016/s0167-4730(02)00057-7

Cited by 73 publications

(31 citation statements)

References 10 publications

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“…The static load carrying capacity generally reaches 92% of the sum of the single wires. This result is very close to the theoretically determined capacity of 94% [10]. Fatigue tests performed on cables at EMPA showed the superior performance of CFRP under cyclic loads [9].…”

Section: The Anchorage Of Cfrp Cablessupporting

confidence: 86%

Carbon Fiber Reinforced Polymer Cables: Why? Why Not? What If?

Meier

2012

Arab J Sci Eng

141

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Cables of suspended structures are suffering due to increased corrosion and fatigue loading. Since 1980, EMPA and BBR Ltd. in Switzerland have been developing carbon fiber-reinforced polymer (CFRP) parallel wire bundles as cables for suspended structures. The excellent properties of those bundles include corrosion resistance, very high specific strength and stiffness, superior equivalent moduli and outstanding fatigue behavior. An anchoring scheme produced with gradient materials based upon ceramics and epoxy is described. For the first time, large CFRP cables were applied in 1996 on the vehicular cable-stayed Stork Bridge with 124 m span in Winterthur, Switzerland. The performance of these cables and later applications was and still is monitored with sophisticated fiber-optical systems. Up to date, these results are fully matching the high expectations. Under the assumptions that (1) the behavior of the pilot applications of CFRP cables described in this paper will be further on fully satisfactory, (2) active systems for distributed mitigation of wind-induced vibrations are going to be successful and (3) there is a need for extremely long-span bridges to cross straits like that of Bab el Mandeb, Messina, Taiwan or Gibraltar, why should the next generation of structural engineers not use CFRP cables for such extremely long-span bridges? This would open spectacular new opportunities.

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Section: The Anchorage Of Cfrp Cablessupporting

confidence: 86%

Carbon Fiber Reinforced Polymer Cables: Why? Why Not? What If?

Meier

2012

Arab J Sci Eng

141

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“…The bearing capacity of this parallel wire cables may be assessed by modeling the cable as a parallel system, see Failure of the wires may be ductile or brittle depending on the wire material characteristics. However, even for a ductile wire failure, the length of the plastic zone will be just in the order of 1-3 times the diameter of wire [2]. Hence it's easily noted that the elastic strains at failure will dominate and the wire failure always has a brittle characteristic [10].…”

Section: Cable Mechanical Model and Load Bearing Estimation Methodsmentioning

confidence: 99%

“…Hence individual wires in it may be considered as being a weakest link structural system (a series system) [2,7]. The strength of it is actually determined by the weakest segment, see Fig.…”

Section: Probabilistic Model Of Single Wire Strengthmentioning

confidence: 99%

“…For the long wires in actual cables, the issue will be discussed hereinafter. As this type of wire is rather long, the material parameters and/or the defects within a certain length may be assumed to be correlated [2]. Define this length as the correlation length L ρ , the expression may be Then for the long single wire, as its strength Z* is determined by the weakest link, i.e Z*=min( Z1, Z2, …, Zλ ) (7) According to the series system theory, the cumulative distribution function of it may be Fig.…”

Section: Probabilistic Model Of Single Wire Strengthmentioning

confidence: 99%

“…Hence the resistance model (also known as bearing capacity model) of it in actual is a probabilistic mechanical model. From this point of view, Faber [2] and Lan [3] both proposed a cable (wire bundles) resistance model on account of the Daniels probabilistic strength theory. In their models, the wire resistances are all assumed to follow Weibull distribution as a basis.…”

Section: Introductionmentioning

confidence: 99%

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Bearing Capacity Estimates of the Parallel Wire Cables of Large Span Cable-stayed Bridges

Bai¹,

Li²,

Li³

2016

Proceedings of the 3rd International Conference on Material Engineering and Application (ICMEA 2016)

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Abstract. As the stay cables are the key members of large span cable-stayed bridges, Accurate calculation of its bearing capacity is the basic foundation of structure design and soundness assessment. Using the statistical theory, 81 φ7-1770MPa new wire strength test results are employed to investigate the law of wire tensile strength distribution. Based on this, the cable parallel system and Monte Carlo sampling method are adopted to develop the Daniels model based bearing capacity calculation theory of parallel wire cable. Using this model, the general law between cable bearing capacity and wire number in it is investigated further. The research indicates that the tensile strength of single short wire follows the normal distribution. And the tensile strength decreases with the increase of the wire length. The whole bearing capacity per single wire also decreases with the increase of wire number in the cables.

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Fatigue damage propagation of FRP under coupling effect of cyclic load and corrosion

Xia,

Feng,

Xin

et al. 2023

Polymer Composites

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Interlaminar fracture or delamination is one of the major failure modes for fiber reinforced polymer (FRP) laminate. Especially, the synergistic effect of environmental exposure and fatigue loads accelerates interface degradation. The main objective in this work was to investigate the fatigue damage propagation of basalt FRP (BFRP) laminate under coupling of acidic environment and fatigue load. The fatigue cycling of 40,000 and the maximum stress of 30% fu (fu = ultimate tensile strength) were adopted. The fatigue specimens under air condition (air fatigue), immersing in water (water fatigue) and immersing in acid (acid fatigue) were introduced. The double cantilever beam (DCB) test was used to evaluate the interlaminar damage of BFRP laminate after fatigue cycling. The fatigue damage propagation mechanism was explored by means of failure modes, load displacement curves, mode I fracture toughness and crack propagation resistance model. The results show that the fatigue weakened the interlaminar properties and resulted in reduced fiber bridging. Especially for the acid fatigue, the laminate was damaged by the coupling of fatigue and acid corrosion. The linear loading stage, nonlinear slow growing stage, stable crack propagation stage and linear unloading stage for DCB after fatigue were observed in the load–displacement curve. The fatigue cycling has caused fracture toughness decrease of 15.0%, 13.8% and 24.1% on air fatigue, water fatigue and acid fatigue respectively. Compared to air fatigue, additional 9.1% interlaminar toughness decrease was evidenced for acidic corrosion fatigue due to the coupling effect of chemical corrosion and physical swelling. The fluctuating decline of crack resistance was caused by discontinuous interface damage, and the interlayer damage was randomly distributed. Thus the interface damage model was proposed to characterize the damage distribution and the damage size.Highlights Degradation law of BFRP under the coupling effect of acid immersion and fatigue load. Interface damage model for characterization of the damage distribution and damage size. Fatigue damage propagation of BFRP under coupling effect of cyclic load and corrosion.

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Aspects of parallel wire cable reliability

Cited by 73 publications

References 10 publications

Carbon Fiber Reinforced Polymer Cables: Why? Why Not? What If?

Carbon Fiber Reinforced Polymer Cables: Why? Why Not? What If?

Bearing Capacity Estimates of the Parallel Wire Cables of Large Span Cable-stayed Bridges

Fatigue damage propagation of FRP under coupling effect of cyclic load and corrosion

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