Abstract
Damage to bridge structures caused by vessel collision is a risk for bridges crossing water traffic routes. Therefore, safety around vessel collision of existing and planned bridges is one of the key technical problems that must be solved by engineering technicians and bridge managers. In the evaluation of the reliability of the bridge structure, the two aspects of vessel‐bridge collision force and structural resistance need to be considered. As there are many influencing parameters, the performance function is difficult to express by explicit function. This paper combines the moment method theory of structural reliability with finite element analysis and proposes a statistical moment method based on finite element analysis for the calculation of vessel‐bridge collision reliability, which solves the structural reliability problem with a nonlinear implicit performance function. According to the probability model based on current velocity, vessel velocity, and vessel collision tonnage, the estimate points in the standard normal space are converted into estimate points in the original state space through the Rosenblatt reverse transform. According to the estimate points in the original state space and the simplified dynamic load model of vessel‐bridge collision, the sample time‐history curve of random vessel‐bridge collision force is generated, the dynamic response of the bridge structure and the structural resistance of the bridge are calculated by establishing a finite element model, and the failure probability and reliability index of the bridge structure is calculated according to the fourth‐moment method. The statistical moment based on the finite element analysis is based on the finite element analysis and the moment method theory of structural reliability. The statistical moment of the limited performance function is calculated through a quite small amount of confirmatory finite element analysis, and the structural reliability index and failure probability are obtained. The method can be widely used in existing finite element analysis programs, greatly reducing the number of finite element analyses needed and improving the efficiency of structural reliability analysis.
Highlights
According to data [1], vessel-bridge collision accidents occur every year around the world and bridge structures are seriously damaged or even collapse, such as the Sunshine Bridge and Queen Isabella Bridge in the United States and the Tasman Bridge in Australia [2]. erefore, vessel-bridge collision is a factor that cannot be ignored in bridge design, and it is necessary to calculate the reliability of the bridge structure when bridge-vessel collision occurs
Aiming at the problem of vessel-bridge collision reliability analysis and solving failure probability of implicit performance function, this paper proposes a statistical moment method for calculating failure probability of vesselbridge collision based on finite element analysis, which is especially suitable for addressing the problem that the performance function cannot be expressed explicitly
(5) According to the obtained dynamic response of vessel collision and the performance index limit value of the bridge structure, the statistical moment of the limit state performance function of the bridge structure is calculated, and the corresponding failure probability of the bridge pier under the action of the sample time-history curve of the vessel collision force is calculated from the obtained statistical moment
Summary
According to data [1], vessel-bridge collision accidents occur every year around the world and bridge structures are seriously damaged or even collapse, such as the Sunshine Bridge and Queen Isabella Bridge in the United States and the Tasman Bridge in Australia [2]. erefore, vessel-bridge collision is a factor that cannot be ignored in bridge design, and it is necessary to calculate the reliability of the bridge structure when bridge-vessel collision occurs. For the calculation of the reliability of the bridge structure, it is usually necessary to consider two aspects: vessel-bridge collision force and structural resistance [3]. E traditional structural reliability methods need to expand the performance function It usually requires complex partial derivative calculation to solve the checking point by iterative calculation, which is difficult to use for structural reliability analysis with implicit performance function. Proske and Curbach [8], Manuel et al [9], Geng [10], Consolazio et al [11], and other scholars used the first-order second-moment method, Latin hypercube sampling Monte Carlo method, and Markov chain Monte Carlo method to study the vessel collision reliability of bridge structures, mainly using Monte Carlo simulation based on deterministic finite element analysis, which requires large amounts of calculation and is time-consuming. The vessel collision reliability of a bridge structure is analyzed by combining the structural reliability moment method theory and finite element analysis
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
