Fast identification of random loads using the transmissibility of power spectral density and improved adaptive multiplicative regularization

Tang, Qizhi; Xin, Jingzhou; Jiang, Yan; Zhou, Jianting; Li, Shaopeng; Fu, Lei

doi:10.1016/j.jsv.2022.117033

Cited by 19 publications

(10 citation statements)

References 40 publications

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“…e double deck adopts an orthotropic deck. e width of the upper orthotropic deck varies from 24 m to 37 m due to functional requirements [19][20][21][22][23][24][25][26][27]. e tower is shaped like a "Tissot shape" with a height of 182 m and is made of C50 concrete.…”

Section: Project Overview Of the Bridgementioning

confidence: 99%

Investigation on Seismic Response of Long‐Span Special Steel Truss Cable‐Stayed Bridge

Zeng

2022

Advances in Civil Engineering

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Due to the small self-weight of the steel truss cable-stayed bridge with a single tower and a single cable plane, the torsional stiffness and wind stability of the structure are reduced. The arrangement of the deck type makes the mechanical properties of the cable-stayed bridge more complicated while reducing the cost and increasing the aesthetics. The effects of structural parameter variations and traveling wave effects on the seismic response of this steel truss cable-stayed bridge with a single tower and a single cable plane were investigated by the nonlinear time-history analysis method and nonuniform seismic analysis method. The results show that the displacement of the floating system under seismic action is larger than the other three systems, but its internal force is significantly smaller than the other three systems. The spectral characteristics and the duration of ground shaking have a greater influence on the maximum bending moment values corresponding to the height of the cable tower and the maximum axial force values of the main girder bars corresponding to the length of the bridge under earthquake action. The effect of steel truss girder stiffness parameter variations on structural internal forces of bridges and the effect of traveling wave effects on structural displacements of bridges in specific apparent wave velocity intervals do not exist universally.

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Section: Project Overview Of the Bridgementioning

confidence: 99%

Investigation on Seismic Response of Long‐Span Special Steel Truss Cable‐Stayed Bridge

Zeng

2022

Advances in Civil Engineering

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“…e loads considered in the stability study include the first-period dead load (dead weight), the second-period dead load (bridge deck pavement, etc. ), steel prestressed tendons, cable tension forces, lateral wind load, construction hanging basket, and vehicle load [15]. For the stability analysis of long-span bridges, the actual vehicle load can be converted into a uniform load along the deck.…”

Section: Bridge Overviewmentioning

confidence: 99%

Experimental Study on Stability of Long‐Span PC Cable‐Stayed Bridge during the Construction Periods

Zeng

Wang

Shi

et al. 2022

Advances in Civil Engineering

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With the increasing span of cable-stayed bridges, the towers are getting higher and higher, and the stiffening beams are becoming more and more slender. The increase in span causes the axial pressure of the beams and towers to increase rapidly, and the sag effect of the cables, geometric nonlinearity, and material nonlinear effects are significantly increased. The influence of these disadvantages greatly reduces the stability of the cable-stayed bridge, and the stability of the cable-stayed bridge becomes prominent. In this paper, the finite element method is used to analyze the first kind of stability problem and the second kind of stability problem of cable-stayed bridges. On this basis, a large-span prestressed concrete (PC) cable-stayed bridge is taken as an example to analyze and compare the two types of stability problems of the bridge during the construction phase and the operation phase. Besides, the model experimental study on the stability of the bridge during the maximum double cantilever construction period was carried out. The theoretical values and the model test results are compared to verify the correctness of the calculation method and design theory, which may provide a reference for the design, construction, and scientific research of cable-stayed bridges.

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“…The local damage monitoring method uses advanced sensors, non-destructive testing and other means to directly diagnose the local damage status of the structure. By contrast, the overall damage identification method uses data mining of structural response information to indirectly extract the characterization index of the structural damage status [6][7][8][9][10][11][12]. As a large and complex civil structure, arch bridges have many key components, and the damage monitoring and identification methods of arch bridges are complicated.…”

Section: Introductionmentioning

confidence: 99%

A Review on Damage Monitoring and Identification Methods for Arch Bridges

et al. 2023

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The damage monitoring and identification of arch bridges provide an important means to ensure the safe operation of arch bridges. At present, many methods have been developed, and the applicability and effectiveness of these methods depend on the damage type, structural configuration and available data. To guide the practical application of these methods, a systematic review is implemented in this paper. Specifically, the damage monitoring and identification methods of arch bridges are divided into the damage monitoring of local diseases and damage identification of overall performance. Firstly, the research on the damage monitoring of the local diseases of arch bridges is reviewed. According to the disease type, it is divided into four categories, including suspender inspection, void monitoring, stress detection and corrosion detection. For each disease, this paper analyzes the principles, advantages and shortcomings of various methods. Then, the damage identification methods of the overall performance of arch bridges are reviewed, including masonry arch bridges, steel arch bridges, reinforced concrete arch bridges and concrete-filled steel tubular arch bridges. And the commonly used damage indexes of damage identification methods are summarized. This review aims to help researchers and practitioners in implementing existing damage detection methods effectively and developing more reliable and practical methods for arch bridges in the future.

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Fast identification of random loads using the transmissibility of power spectral density and improved adaptive multiplicative regularization

Cited by 19 publications

References 40 publications

Investigation on Seismic Response of Long‐Span Special Steel Truss Cable‐Stayed Bridge

Investigation on Seismic Response of Long‐Span Special Steel Truss Cable‐Stayed Bridge

Experimental Study on Stability of Long‐Span PC Cable‐Stayed Bridge during the Construction Periods

A Review on Damage Monitoring and Identification Methods for Arch Bridges

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