Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Time-varying Reliability of Suspension Bridge Towers under Random Vehicle Flow and Resistance Degradation
To address the problem of reliability calculation for long-span suspension bridge towers under the combined time-varying effects of random vehicle flow and deterioration of resistance, this paper examines the load response characteristics and extreme value time-varying trends of tower structures subjected to random vehicle flow. A time-dependent thickness model for corrosive damage in concrete structures was established. Building on this, Building on this, the time-varying reliability of the cable tower is calculated. The results showed that the load response of the left and right towers was a stable Gaussian random process, and the load response extremum increased with the increase of operation time. After 100 years of operation, the load response extremums in the Y direction of the tower tops were 87676.8 kN and 89225.5 kN, respectively. At that time, the compressive strength of the towers decreased to 0.77 times the initial value, and the thickness of the corrosion layer was about 0.16 m. Meanwhile, the time-varying reliability of the left and right towers showed the distribution pattern of an exponential function. After 60 years of operation, the reliability decreased to 4.11 and 4.15, respectively. Moreover, the concrete elastic modulus had the most significant effect on the failure probability of bridge towers. The research results could provide references for the safety evaluation and structural maintenance of suspension bridges in operation.
Time-varying Reliability of Suspension Bridge Towers under Random Vehicle Flow and Resistance Degradation
To address the problem of reliability calculation for long-span suspension bridge towers under the combined time-varying effects of random vehicle flow and deterioration of resistance, this paper examines the load response characteristics and extreme value time-varying trends of tower structures subjected to random vehicle flow. A time-dependent thickness model for corrosive damage in concrete structures was established. Building on this, Building on this, the time-varying reliability of the cable tower is calculated. The results showed that the load response of the left and right towers was a stable Gaussian random process, and the load response extremum increased with the increase of operation time. After 100 years of operation, the load response extremums in the Y direction of the tower tops were 87676.8 kN and 89225.5 kN, respectively. At that time, the compressive strength of the towers decreased to 0.77 times the initial value, and the thickness of the corrosion layer was about 0.16 m. Meanwhile, the time-varying reliability of the left and right towers showed the distribution pattern of an exponential function. After 60 years of operation, the reliability decreased to 4.11 and 4.15, respectively. Moreover, the concrete elastic modulus had the most significant effect on the failure probability of bridge towers. The research results could provide references for the safety evaluation and structural maintenance of suspension bridges in operation.
Time-varying Reliability of Suspension Bridge Towers under Random Vehicle Flow and Resistance Degradation
KSCE J Civ Eng
Long, Nengzeng (Autor:in) / Ren, Song (Autor:in) / Zhao, Yunfeng (Autor:in) / Wu, Fei (Autor:in) / Zhang, Ping (Autor:in) / Zhang, Chuang (Autor:in)
KSCE Journal of Civil Engineering ; 28 ; 3402-3419
01.08.2024
18 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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