Damage Detection for Simply Supported Bridge with Bending Fuzzy Stiffness Consideration

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

doi:10.1007/s12204-018-1939-4

Cited by 8 publications

(3 citation statements)

References 13 publications

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“…By reducing the elastic modulus of the local structure to simulate the damage [26], E'I and E'A represent the degradation of flexural rigidity and tensile rigidity. Taking the hingeless arch of the left span damaged somewhere as an example, a symmetrical basic system is selected by the principle of force method, as depicted in Figure 4.…”

Section: Redundancy Force Influence Line Of Constant Section Hingeles...mentioning

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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Section: Redundancy Force Influence Line Of Constant Section Hingeles...mentioning

confidence: 99%

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

Zhou,

Li,

Shi

et al. 2023

Buildings

Self Cite

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show abstract

“…G. Ranzi et al proposed a numerical structural formulation to compare the deformation characteristics of combined beams with partial shear interactions under short and long-term loadings [ 10 ]. Zhou et al proposed an approximation method based on the Dischinger method to decouple the set of differential equations for concrete creep and obtain an approximate solution to the set of differential equations while neglecting the effects of redistributed bending moments on axial strain in concrete slabs [ 11 ]. Wang et al used the age-adjusted effective modulus method to establish a differential control equation for the interface slip and axial forces of composite beams under the action of creep [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Study on the Mechanical Properties of Continuous Composite Beams under Coupled Slip and Creep

et al. 2023

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Steel–concrete continuous composite beams are widely used in buildings and bridges and have many economic benefits. Slip has always existed in composite beams and will reduce the stiffness of composite beams. The effect of creep under a long-term load will also be harmful. Many scholars ignore the combined effects of slip and creep. In order to more accurately study the mechanical properties of steel–concrete continuous composite beams under long-term loads, this paper will consider the combined actions of slip and creep. By combining the elastic theory and the age-adjusted effective modulus method, the differential equation of the composite beam is derived via the energy variational method. The analytical solutions of axial force, deflection and slip under a uniform load are obtained by substituting the relevant boundary conditions. The creep equation is used to simulate the behavior of concrete with time in ANSYS. The analytical solution is verified by establishing a finite element model of continuous composite beams considering slip and creep. The results suggest the following: the analytical solution is consistent with the finite element simulation results, which verifies the correctness of the analytical solution. Considering the slip and creep effects will increase the deflection of the composite beam and the bending moment of the steel beam, reduce the bending moment of the concrete slab and have a significant impact on the structural performance of the continuous composite beam. The research results considering the coupling effect of slip and creep on continuous composite beams can provide a theoretical basis for related problems.

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“…The damage identification method based on static characteristics is typically employed when the structure is in a static state. Zhou et al [10] considered the uncertainty of cross-sectional parameters and proposed a method to locate damage in simply supported beam bridges using the influence line interpolation of arbitrary cross-sectional rotation angles. However, this method is characterized by a relatively simple model and narrow applicability.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Bridge Structural Damage Identification Based on Quasi-Static Displacement Effects and Wavelet Packet Decomposition

Chen,

Zhang,

et al. 2023

Buildings

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Based on the displacement-induced linearity error curve and the theory of wavelet packet analysis, a bridge structural damage identification method is proposed, integrating two damage indicators: Quasi-Static Displacement-Induced Linearity Error Curve (QSDIL) and Relative Energy Rate of Wavelet Packet Energy Spectrum (RES). This method first constructs the QSDIL damage indicator based on a quasi-static displacement-induced linearity error, which is used for the preliminary localization of the bridge structural damage. Subsequently, relying on the principles of wavelet packet analysis, the method constructs the RES damage indicator for accurate positioning of the damage location in the bridge structure. The proposed method is experimentally validated, and the impact of factors such as single-point damage, multi-point damage, signal noise, lane position, and vehicle weight on the experimental results is investigated. The results indicate that the proposed method exhibits excellent identification performance for the location of structural damage in both single-point and multi-point damage scenarios, with good agreement between experimental and theoretical values. As the signal-to-noise ratio decreases, the accuracy and precision of the RES curve in locating the bridge structural damage position exhibit a nonlinear decreasing trend, with relatively small identification errors observed at noise levels of 90 dB to 100 dB. Different lane positions have a minimal impact on the damage identification effectiveness. With increasing vehicle weight, both QSDIL and RES curves show an increasing trend in peak values, facilitating the localization of bridge structural damage positions.

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Damage Detection for Simply Supported Bridge with Bending Fuzzy Stiffness Consideration

Cited by 8 publications

References 13 publications

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

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

Study on the Mechanical Properties of Continuous Composite Beams under Coupled Slip and Creep

Experimental Study on Bridge Structural Damage Identification Based on Quasi-Static Displacement Effects and Wavelet Packet Decomposition

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