Damage Identification in Simply Supported Bridge Based on Rotational-Angle Influence Lines Method

Zhou, Yu; Di, Shengkui; Xiang, Changsheng; Li, Wanrun; Wang, Lixian

doi:10.1007/s12209-018-0135-9

Cited by 17 publications

(7 citation statements)

References 28 publications

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“…It assumes a reference value for the energy dissipation capacity of each member and does not consider the effect of the member loading history. The cyclic degradation rate β is calculated as follows [20]:…”

Section: Improved Ibarra-medina-krawinkler Restoring Modelmentioning

confidence: 99%

Research on Seismic Vulnerability of High-Pier and Long-Span Bridges Based on Improved IMK Resilience Model

Wang

Yin

2022

Journal of Sensors

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After the fragility curve is established, the probability of structural damage reaching each level of damage under the action of the ground motion can be determined according to the ground motion parameters, so as to calculate the direct and indirect loss caused by the structural damage and complete the earthquake damage prediction. This paper combines the improved IMK resilience model to study the seismic vulnerability of high-pier and long-span bridges. Moreover, this paper obtains the parameter calculation model based on the regression analysis of PEER’s 255 column specimen data. The improved IMK model needs to modify the elastic stiffness and strain hardening rate of the rotating spring to ensure the accuracy of the lateral stiffness of the component. The experimental research shows that the seismic vulnerability research model of high-pier and long-span bridges based on the improved IMK restoring force model has a certain analytical effect.

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Section: Improved Ibarra-medina-krawinkler Restoring Modelmentioning

confidence: 99%

Research on Seismic Vulnerability of High-Pier and Long-Span Bridges Based on Improved IMK Resilience Model

Wang

Yin

2022

Journal of Sensors

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“…Influence lines have been widely used in bridge engineering, such as rapid assessments of bridge load capacity [6], model revision [7], and bridge load bearing [8]. In recent years, methods based on influence line damage identification have been rapidly developed [9,10]. Fan et al [11] proposed an identification method for the damage of displacement difference influence lines of tiedarch bridges, derived the displacement influence lines of tied-arch bridges with the force method equation and verified the effectiveness of those displacement difference influence lines in identifying suspender damage on arch bridges through the finite element model.…”

Section: Introductionmentioning

confidence: 99%

Research on Damage Identification of Arch Bridges Based on Deflection Influence Line Analytical Theory

Zhou,

Li,

Shi

et al. 2023

Buildings

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There is no analytical solution to the deflection influence line of catenary hingeless arches nor an explicit solution to the deflection influence line difference curvature of variable section hingeless arches. Based on the force method equation, a deflection influence line analytical solution at any location before and after structural damage is obtained, and then an explicit solution of the deflection influence line difference curvature of the structural damage is obtained. The indexes suitable for arch structure damage identification are presented. Based on analytical theory and a finite element model, the feasibility of identifying damage at a single location and multiple locations of an arch bridge is verified. This research shows that when a moving load acts on a damaged area of an arch structure, the curvature of the deflection influence line difference will mutate, which proves theoretically that the deflection influence line difference curvature can be used for the damage identification of hingeless arch structures. This research has provided theoretical support for hingeless arch bridge design and evaluation. Combined with existing bridge monitoring methods, the new bridge damage identification method proposed in this paper has the potential to realize normal health status assessments of existing arch bridges in the future.

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“…Later, they further employed the IL information to evaluate load-carrying capacity by using the field measurement of a long-span bridge. 20 Other studies on IL-based indices included but were not limited to Sun et al 21 for SIL, Alamdari et al 22 for DIL, and Zhou et al 23 for RIL. Meanwhile, many IL identification methods, which usually require the moving vehicle-induced response and the corresponding vehicle weight information, have been explored in companies with these damage detection studies.…”

Section: Introductionmentioning

confidence: 99%

Optical frequency domain reflectometry sensing for damage detection in long-span bridges using influence surface

Cai

Zhu

2023

Structural Health Monitoring

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With the development of optical frequency-domain reflectometry (OFDR)-based distributed strain sensing technology and static influence line (IL) measurement concept, the special influence surface (IS) measurement, a function of sensing and force locations, has become technically feasible. This study investigated, for the first time, damage detection in long-span bridges using the special IS constructed on the basis of the OFDR-based distributed sensing. The damage detection performance of IS was validated through numerical and experimental case studies on a scaled physical Tsing Ma bridge (TMB) model. First, the special IS concept was elaborated. The scaled TMB model was then introduced as a representative long-span bridge. Subsequently, the IS characteristics of different bridge components of the scaled TMB were analyzed using the finite element model (FEM). Various IS-based indices, including strain IS (SIS) and displacement IS (DIS), were applied to hypothetical damage scenarios where the bottom and top chords were subjected to severe damage in the FEM. The extracted ISs successfully realized damage localization with relatively great sensitivities. For comparison, the modal parameters were also output for damage detection. In the experimental section, an OFDR-based distributed sensor was placed along the top chord of one middle grid in the scaled TMB model to construct the SIS. The SIS changes could accurately localize the single, double, and triple bottom-chord damages. The numerical and experimental results demonstrated the feasibility and effectiveness of the OFDR-constructed special SIS for damage detection, indicating that IS is a promising damage indicator for long-span bridges, promoting the development of distributed sensing techniques in structural health monitoring for real-bridge applications.

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Damage Identification in Simply Supported Bridge Based on Rotational-Angle Influence Lines Method

Cited by 17 publications

References 28 publications

Research on Seismic Vulnerability of High-Pier and Long-Span Bridges Based on Improved IMK Resilience Model

Research on Seismic Vulnerability of High-Pier and Long-Span Bridges Based on Improved IMK Resilience Model

Research on Damage Identification of Arch Bridges Based on Deflection Influence Line Analytical Theory

Optical frequency domain reflectometry sensing for damage detection in long-span bridges using influence surface

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