Abstract
The framework security of a bridge is essential as a critical component of traffic engineering. Even though the bridge structure is damaged to various degrees due to various reasons, the bridge will be wrecked when the damage reaches a particular level, suggesting a negative influence on people’s lives. Based on the current situation and existing problems of structural damage identification of bridges, a structural damage identification technology of continuous beam bridges based on deflection influence lines is proposed in this paper in order to keep track of and always detect broken bridge elements, thereby extending the bridge’s service life and reducing the risk of catastrophic accidents. The line function expression of deflection impact on a multi-span continuous beam bridge was first obtained using Graphic Multiplication theory. From the theoretical level, the influence line function of the continuous beam bridge without extensive damage was computed, and a graph was generated. The photographs of the DIL as well as the first and second derivatives, the deflection influence line distinction and its first and second derivatives, and the DIL distinction and its first and second derivatives of a continuous beam bridge in a single position and multi-position destruction were fitted in this paper. Finally, after comparing multiple work conditions and multiple measuring points, it was found that the first derivative of deflection influence line difference had the best damage identification effect. The design was completed and tested, which had verified the feasibility of this theory.
Highlights
The economy of any nation is heavily reliant on transportation infrastructure
According to the second derivative identification law of the influence line difference under single-point damage of the continuous beam bridge structure, the location of the image peak was the location of the damage section
The current study identifies the multi-damage of multi-span bridges based on influence lines
Summary
The economy of any nation is heavily reliant on transportation infrastructure. It is critical to ensure that this infrastructure has dependable mobility and serviceability. To analyze and evaluate the bridge’s deterioration detection, Kou Xiaona first practically used the effectual deflection contour (comprising its first derivative and second derivative) to detect deteriorations in the structure [17] She functionalized the theory of mechanics to the numerical analysis of the purely maintained beam model of the reinforced concrete, and justification was made to achieve the deflection influence line (DIL) of the supported beam and its first and second derivatives. Afterwards, she performed a finite element modeling analysis by ANSYS. Previous authors demonstrated that the non-structural elements, including the pedestrian sidewalk and overlay of joint granite block, could significantly cause deflection in the historical Boco bridge [20]
Sign-in/Register to view highlights & summary 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.
