Dynamic contact behaviors of saddle materials for suspension bridge

Wang, Dagang; Wang, Bo; Gao, Wenli; Ye, Jihong; Wahab, Magd Abdel

doi:10.1016/j.engfailanal.2022.106031

Cited by 11 publications

(7 citation statements)

References 15 publications

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“…The mechanical parameters of the wire are an elastic modulus of 166 GPa, a tensile strength of 1650 Mpa, a nominal fracture true strain of 0.482 Mpa, a yield strength of 1601 Mpa, a section shrinkage of 38.3%, and a minimum cross-sectional area (at neck reduction) of 0.9503 mm 2 . According to references [1,4], the saddle groove material is ZG 275-485 with a yield strength of 275 Mpa, an elastic modulus of 274 Gpa, and a Poisson ratio of 0.28. The contact length between the saddle groove and the fatigue wire is 10 mm, compared to 5 mm between the loading wire and fatigue wire.…”

Section: Experimental Materials and Parametersmentioning

confidence: 99%

“…In the operation process, under the coupling effect of a dead load (such as a stiffening beam, main cable, and sling), live load (such as automobiles and railway trains), and wind load [1,2], the main cable will generate time-varying dynamic loads on both sides of the main saddle, resulting in a force imbalance in the main cable on both sides of the middle tower [2,3]. With the continuous action of the unbalanced force, dynamic contact and "layered-slipping" phenomena occur between the main cable wires in the main saddle [4], resulting in friction, wear, and fatigue between the steel wire and the saddle material. At the same time, due to the intrusion and retention of rain and water vapor, electrochemical corrosion will occur on the steel wire inside the main cable.…”

Section: Introductionmentioning

confidence: 99%

“…The development of cumulative damage causes a deterioration in the wire wear and a decrease in the effective cross-sectional area, which leads to the gradual deterioration of the wire's load-bearing strength. A decrease in the wire load-bearing capacity seriously affects the load-bearing safety of the main cable [4][5][6][7]. Therefore, it is of great significance to study the tribo-corrosion-fatigue deterioration behaviors of main cable wires to ensure the load-bearing safety of the main cable in suspension bridges.…”

Section: Introductionmentioning

confidence: 99%

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Gradual Deterioration Behavior of the Load-Bearing Strength of Main Cable Wires in a Suspension Bridge

Chong

Wang

et al. 2022

Applied Sciences

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The main cable is the primary load-bearing component of a long-span multi-tower suspension bridge. The interaction between a dead load, vehicle load, wind load, and the corrosion environment leads the main cable wire to exhibit tribo-corrosion-fatigue behaviors. This behavior causes wire wear and deterioration, as well as a reduction in the effective cross-sectional area. This leads to the gradual deterioration of the wire’s load-bearing strength and seriously affects the load-bearing safety of the main cable. In order to ensure the safety of suspension bridges, it is critical to investigate the gradual deterioration behavior of the main cable wire’s load-bearing strength. A wire tribo-corrosion-fatigue test rig was established to test the wire under different friction pairs (saddle groove or parallel wires). The cross-sectional failure area of the wire with different pairs was obtained by super-depth electron microscopy and calculation. The damage degree evolution model and the deterioration model of the wire load-bearing strength were established by combining the theory of damage mechanics and the finite element method. The results show that, as contact and fatigue loads increase, so does the cross-sectional failure area of the fatigue steel wire. The fatigue wire’s damage degree has a good quadratic function relationship with fatigue cycles. The damage degree of the wire increases and the load-bearing strength decreases with increasing contact load and fatigue load. The load-bearing strength of the wire changes little at the beginning and decreases with increasing fatigue cycles. The results have fundamental significance for the life prediction of the main cable wires of suspension bridges.

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Section: Experimental Materials and Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Gradual Deterioration Behavior of the Load-Bearing Strength of Main Cable Wires in a Suspension Bridge

Chong

Wang

et al. 2022

Applied Sciences

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“…The main cable with the characteristics of high cost and difficult replacement is a flexible load-bearing component, which is the "lifeline" of the suspension bridge [1,2]. The bearing safety and anti-sliding safety of the main cable are directly related to the structural safety of the suspension bridge [2][3][4]. Once it fails, it will seriously cause huge economic losses and endanger people's lives.…”

Section: Introductionmentioning

confidence: 99%

“…The main cables are subjected to wind loads in different directions due to strong wind [5]. The effects of ambient temperature changes and sunlight radiation lead to significant temperature gradients in the temperature field inside and on the main cable (due to the hysteresis of the temperature change inside the main cable), which causes changes in the internal force and the shape of the main cable [1,3]. In addition, the main cables shared by road and railway are subjected to dead loads (deck systems, stiffening beams, main cables, hangers) and live loads (cars, railway trains) through hangers and cable clamps.…”

Section: Introductionmentioning

confidence: 99%

Tribo-corrosion interaction of the parallel steel wires in the suspension bridges

Wang

Chong

et al. 2023

Friction

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The effect of contact load and relative displacement on tribo-corrosion interaction of parallel steel wires of main cable in the suspension bridge was investigated in this study. A self-made tribo-corrosion test bench was employed to conduct tribo-corrosion tests of parallel steel wires in 3.5% (wt%) NaCl solution and deionized water under different contact loads and different relative displacements. The friction coefficient and wear coefficient of wires were presented. Electrochemical corrosion behavior (Tafel polarization curves, Nyquist diagram, and equivalent circuit diagram) was characterized by electrochemical analyzer. Wear morphology was observed by scanning electron microscope. Wear volume loss and corrosion-wear interaction were quantitatively demonstrated by high-precision weighing balance. The results show that the electrochemical corrosion ability of the steel wires increases with the increase of the contact load or relative displacement. The increased contact load or relative displacement increases the volume loss of corrosion-wear and pure wear, but decreases the wear coefficient. The wear mechanisms in 3.5% NaCl solution are adhesive wear, abrasive wear, and corrosive wear as compared to adhesive wear and abrasive wear in deionized water under different contact loads. The wear mechanisms of parallel steel wires are slightly different under different relative displacements. But the main wear mechanisms are similar to that under different contact loads. The interaction effects of corrosion and wear produced by the contact load and relative displacement are all the synergistic effects.

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Influence of Hydrodynamic Effect on Dynamic Response of Bridge with Complex Piers Submerged in Reservoir

Li,

Xu,

Yang

et al. 2023

KSCE J Civ Eng

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Dynamic contact behaviors of saddle materials for suspension bridge

Cited by 11 publications

References 15 publications

Gradual Deterioration Behavior of the Load-Bearing Strength of Main Cable Wires in a Suspension Bridge

Gradual Deterioration Behavior of the Load-Bearing Strength of Main Cable Wires in a Suspension Bridge

Tribo-corrosion interaction of the parallel steel wires in the suspension bridges

Influence of Hydrodynamic Effect on Dynamic Response of Bridge with Complex Piers Submerged in Reservoir

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