Proposed New Analytical Method of Tower Load in Large-Span Arch Bridge Cable Lifting Construction

Huang, Qian; Wu, Xiaoguang; Zhang, Yunfei; Ma, Min

doi:10.3390/app12189373

Cited by 8 publications

(7 citation statements)

References 32 publications

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“…The sensor adopts a lightweight structure to ensure that the strain gauge and the structure are measured deformation synchronously; the vibration chord is imported into a special superstrong steel wire; the anchoring welding process for the international standard anchoring method; high stability, high performance, high accuracy, etc., are the characteristics of the sensor, and it is designed to have a long service life [11] ; the sensor with a T in the tail indicates that the internal semiconductor temperature sensors are set up, and can be corrected for the temperature; the intelligent sensor directly displays the strain value (𝜇𝜀 ), not just the frequency of the vibrating string. The parameters of the sensor are shown in Table 1.…”

Section: Pilot Study 21 Test Equipment 211 Strain Gauge Selectionmentioning

confidence: 99%

Experimental study on the monitoring of concrete shrinkage based on intelligent string strain sensors

Chen,

Xiong

et al. 2023

Preprint

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Aiming at the phenomenon that shrinkage will generate tensile stresses inside the concrete structure and cause damage, thus forming a potential hazard to the engineering structure, as well as current incomplete research on the influence of reinforcement on the shrinkage of concrete, the study was carried out using intelligent string strain sensors to monitor the shrinkage of three specimens with different reinforcement ratios in a natural environment for nine months. The results show that: the intelligent string strain sensor can automatically record the strain and temperature, as well as the temperature correction in the shrinkage monitoring; in the natural environment, the effect of humidity on the concrete shrinkage is more obvious than the temperature, and when the coefficient of thermal expansion of the concrete and the sensor is closer to each other, it can offset the effect of the temperature on the shrinkage of the concrete; the shrinkage of reinforced concrete is not linearly decreasing with the increase in reinforcement rate at all ages. The shrinkage inhibition effect of steel reinforcement on concrete is obvious only when the reinforcement ratio reaches a certain amount.

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Section: Pilot Study 21 Test Equipment 211 Strain Gauge Selectionmentioning

confidence: 99%

Experimental study on the monitoring of concrete shrinkage based on intelligent string strain sensors

Chen,

Xiong

et al. 2023

Preprint

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“…The cable hoisting system mainly consists of cable towers, anchorages, main cables, hoisting cables, pulling cables, fixed saddles, traveling cranes (Figure 1), spreaders, hoisting and traction winches, automation control systems and other major systems [1,2] (Figure 2). The cable hoisting system mainly consists of cable towers, anchorages, main cables, hoisting cables, pulling cables, fixed saddles, traveling cranes (Figure 1), spreaders, hoisting and traction winches, automation control systems and other major systems [1,2] (Figure 2). When the crane is traveling with a load, the main cable under its action will be forced to vibrate, resulting in a load greater than the static load under the action of deformation and internal force; this phenomenon is the "coupling vibration" effect.…”

Section: Introductionmentioning

confidence: 99%

“…So, the forced vibration of the main cable will be different from the single cable vibration. The cable hoisting system mainly consists of cable towers, anchorages, main cables, hoisting cables, pulling cables, fixed saddles, traveling cranes (Figure 1), spreaders, hoisting and traction winches, automation control systems and other major systems [1,2] (Figure 2). When the crane is traveling with a load, the main cable under its action will be forced to vibrate, resulting in a load greater than the static load under the action of deformation and internal force; this phenomenon is the "coupling vibration" effect.…”

Section: Introductionmentioning

confidence: 99%

Coupled Vibration Analysis of Multi-Span Continuous Cable Structure Considering Frictional Slip

Tian,

2024

Applied Sciences

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As important load-bearing structures, suspension cables have been widely used in suspension bridges, engineering ropeways, cable suspension systems and other special equipment. Their dynamic problems have always been a research hotspot. Especially for complex cable systems such as engineering ropeways and cable lifting equipment, there will be moving loads acting on multi-span continuous friction-slip cable structures, resulting in nonlinear coupled vibration. Therefore, few scholars have studied how to calculate the nonlinear coupling vibration effect between such moving loads and multi-span continuous cables considering friction slip. Therefore, this paper proposes the use of the combination of the direct stiffness method and the Newmark-β integration method to solve the nonlinear system of equations of motion, which can be derived from the coupled vibration response between the moving load and the main cable. The corresponding calculation program is prepared. Combined with the dynamic load test and simulation results of engineering cases, the correctness and reasonableness of the coupled vibration equations and the program can be verified through comparative analysis. The results show that the calculation results of the self-programmed program are in good agreement with the dynamic load test results, in which the maximum error of the vertical displacement in the span is −4.40% and 0.86%, and the error of the static calculation reaches −13.90%. The impact effect is more obvious when hoisting the weight out of the pulling cable, in which the impact coefficient of the main cable can be up to 2.0. The impact coefficient of the deviation of the cable tower is 4.0. During the traveling process of the moving load, the vertical downward deflection of the main cable at the action point is the largest, and the upward deflection is in the region of 0.2~0.8L from the action point.

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“…The number of bridges being constructed in China is increasing rapidly with the ongoing development of highway and bridge infrastructure [1][2][3]. An arch bridge is a common long-span shape in modern transportation.…”

Section: Introductionmentioning

confidence: 99%

Construction-Monitoring Analysis of a Symmetrical Rigid Frame Tied Steel Box Arch Bridge in Southwest China Based on Segmental Assembly Technique

Zhang¹,

Wang

Nong

et al. 2023

Symmetry

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Tied steel box arch bridges are increasingly being used due to their attractive appearance, high load-bearing capacity, and good stress performance. Their construction involves multiple processes and factors. Construction monitoring can ensure that such a bridge remains in its intended stress and linear states during and after construction. This helps to minimize deviations from the design state at every stage of construction. Using the segmental assembly construction technique, this study conducted construction monitoring of the alignment and force at each stage of the reconstruction of bridges using MIDAS Civil software. The construction monitoring analysis indicated that the arch rib and lattice beam were correctly placed, thereby meeting the specified requirements for arch rib closure. Displacement errors between the measured and theoretical values at each stage of construction fell within an allowable range, resulting in overall smooth bridge alignment. The measured stress in the main arch and the lattice beam generally corresponded to the theoretical stress derived from the control section stress of the entire bridge. The deviation between the cable force of the suspender and the tie rod and theoretical value fell within 10%, indicating good stress reserve. The symmetrical monitoring points in the analyzed rigid-frame tied steel box arch bridges exhibited symmetrical displacement, stress, and cable force results under various working conditions. This observation further confirms the effectiveness of construction monitoring using the segmental assembly technique.

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Proposed New Analytical Method of Tower Load in Large-Span Arch Bridge Cable Lifting Construction

Cited by 8 publications

References 32 publications

Experimental study on the monitoring of concrete shrinkage based on intelligent string strain sensors

Experimental study on the monitoring of concrete shrinkage based on intelligent string strain sensors

Coupled Vibration Analysis of Multi-Span Continuous Cable Structure Considering Frictional Slip

Construction-Monitoring Analysis of a Symmetrical Rigid Frame Tied Steel Box Arch Bridge in Southwest China Based on Segmental Assembly Technique

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