Analysis of cable force parameters on extradosed cable-stayed bridges with corrugated steel webs

2021 ◽  
Author(s):  
Lin Lan ◽  
WeiQiang Ji ◽  
Shui Wan
Keyword(s):  
Cable Force ◽  
Cable Stayed Bridges

scholarly journals Interaction between Track and Long-Span Cable-Stayed Bridge: Recommendations for Calculation

2020 ◽  
Vol 2020 ◽  
pp. 1-14
Author(s):  
Kaize Xie ◽  
Weigang Zhao ◽  
Xiaopei Cai ◽  
Ping Wang ◽  
Jia Zhao
Keyword(s):  
Bridge Deck ◽  
Longitudinal Force ◽  
Initial Deformation ◽  
Positive Temperature ◽  
Temperature Changes ◽  
Cable Stayed Bridge ◽  
Cable Force ◽  
Longitudinal Resistance ◽  
Beam Bridge ◽  
Cable Stayed Bridges

Geometric nonlinearity (GN) and initial internal forces (IIFs) are the basic characteristics of cable-stayed bridges, but now there is no effective method for analyzing the effect of them on bridge-track interaction of continuous welded rail (CWR) on cable-stayed bridge. A method for reconstructing the displacement-force curve of ballast longitudinal resistance was put forward according to the deformation of cable-stayed bridges under the completed bridge state. A feasibility study on the method was conducted via two aspects of the force and deformation of CWR on a 5 × 40 m single-line simple-supported beam bridge with initial deformation. With the multi-element modeling method and the updated Lagrangian formulation method, a rail-beam-cable-tower 3D calculation model considering the GN and IIFs of cable-stayed bridge was established. Taking a (140 + 462 + 1092 + 462 + 140 m) twin-tower cable-stayed bridge as an example, the impacts of GN and IIFs on bridge-track interaction were comparatively analyzed. The results show that the method put forward to reconstruct ballast longitudinal resistance can prevent the impact of initial deformation of bridge and makes it possible to consider the effect of IIFs of cable-stayed bridge on bridge-track interaction. The GN and IIFs play important roles in the calculation of rail longitudinal force due to vertical bending of bridge deck under train load and the variance of cable force due to negative temperature changes in bridge decks and rails with rail breaking, and the two factors can reduce rail longitudinal force and variance of cable force by 11.8% and 14.6%, respectively. The cable-stayed bridge can be simplified as a continuous beam bridge with different constraints at different locations, when rail longitudinal force due to positive temperature changes in bridge deck and train braking is calculated.

Optimum Cable-Force Adjustments in Concrete Cable-Stayed Bridges

1995 ◽  
Vol 121 (4) ◽  
pp. 685-694 ◽  
Author(s):  
A. Kasuga ◽  
H. Arai ◽  
J. E. Breen ◽  
K. Furukawa
Keyword(s):  
Cable Force ◽  
Cable Stayed Bridges

The Reasonable Finished Dead State Research of Partially Earth-Anchored Cable-Stayed Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 1319-1325 ◽  
Author(s):  
Li Wen Zhang ◽  
Rui Jie Xia
Keyword(s):  
Adjustment Process ◽  
Influence Matrix ◽  
Cable Stayed Bridge ◽  
Dead State ◽  
State Research ◽  
Secondary Stage ◽  
Beam Method ◽  
Cable Force ◽  
Mechanics Characteristics ◽  
Cable Stayed Bridges

Based on the mechanics characteristics of partially earth-anchored cable-stayed bridge, the criterion of reasonable finished dead state was presented. The effect factors considered include: the distribution of cable force, the inner force of girder and tower, the dimension of earth-anchor, and the displacement of tower top. Combined with methods to determine cable force of traditional self-anchored cable-stayed bridges in reasonable completed status, a two-stage method was used to find the cable force of these bridges which was divided into finding the initial cable force with rigid supported continuous beam method and then fix on the final optimized cable force in the reasonable completed status through adjusting the initial cable force in first stage with influence matrix method. And the adjustment process of cable force in secondary stage was proposed based on the mechanics characteristics of these bridges. Finally, a calculation was carried out for a partially earth-anchored cable-stayed bridge with 1218m main span and composite beam. The result shows that this method was logical, practical convenient and efficient. And the cable force in the reasonable completed status of bridges can be obtained faster according to the adjustment process of cable force in secondary stage.

scholarly journals Estimation of Extreme Cable Forces of Cable-Stayed Bridges Based on Monitoring Data and Random Vehicle Models

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Yuan Ren ◽  
Zhiyuan Zhu ◽  
Ziyuan Fan ◽  
Qiao Huang
Keyword(s):  
Estimation Method ◽  
Value Theory ◽  
Extreme Value ◽  
Monitoring Data ◽  
Daily Maximum ◽  
Traffic Data ◽  
Cable Force ◽  
Maintenance Decisions ◽  
Cable Forces ◽  
Cable Stayed Bridges

For long-span cable-stayed bridges, cables serve as one of the most important components to guarantee structural integrity. Forces of stay cables indicate not only the performance of cables themselves but also the overall condition of bridges. In order to help stakeholders to make maintenance decisions, an extreme cable force estimation method was proposed based on cable force measurements and traffic data from the weighing system. First, raw monitoring data were preprocessed based on a median filtering to obtain usable cable force signals. The multiresolution wavelet method was used to extract traffic-induced force component from mixed signals. Then, a Monte Carlo-based random vehicle model was developed using traffic data from the weighing system. Based on field temperature measurements and simulation of traffic-induced effects, extreme cable forces with respect to vehicle loads and temperature effects were predicted by extreme value theory. The Generalized Pareto Distribution (GPD) was adopted to establish the probability distribution models of the daily maximum cable force. Then, the extreme value within a return period of 100 years was determined and compared with the design loading demand. Finally, the effectiveness of the proposed method was validated through a cable-stayed bridge in China. As a result, the low-frequency varying component of cable force response had positive correlation with environmental temperatures, and the extreme value of the predicted cable force under prospective traffic volumes was within limit interval value according to the design code. The conclusions can be utilized by bridge owners to make maintenance decisions.

scholarly journals Study of Cable Force of Construction Control and Alignment Control of Main Girders for Long-Span Railway Cable-Stayed Bridges

2013 ◽  
Vol 7 (9) ◽  
Author(s):  
Zengshun Chen ◽  
Cheng Zhang ◽  
Jianting Zhou ◽  
Jun Song ◽  
Chunrong Huang
Keyword(s):  
Construction Control ◽  
Long Span ◽  
Cable Force ◽  
Cable Stayed Bridges

scholarly journals Optimization of Cable Force Adjustment in Cable-Stayed Bridge considering the Number of Stay Cable Adjustment

2020 ◽  
Vol 2020 ◽  
pp. 1-20
Author(s):  
Han-Hao Zhang ◽  
Nan-Nan Sun ◽  
Pei-Zhi Wang ◽  
Man-Hui Liu ◽  
Yuan Li
Keyword(s):  
Sensitivity Analysis ◽  
Calculation Method ◽  
Maintenance Phase ◽  
Optimization Method ◽  
Stay Cable ◽  
Stay Cables ◽  
Design Variables ◽  
Optimization Calculation ◽  
Cable Force ◽  
Cable Stayed Bridges

Modern cable-stayed bridges are spatial, multicable systems. The cable force needs to be adjusted during the construction phase and maintenance phase. The existing calculation methods of cable force adjustment mainly considered the rationality of structural force, but only few research studies have been conducted on how to reduce the number of stay cables which need to be adjusted. This study aims to propose an optimization calculation method including the optimization module with the sensitivity analysis and updating design variable module (UDVM), which are used for cable force adjustment in cable-stayed bridges. Based on the finite difference method, the sensitivity analysis is adopted in the optimization module, which can capture the response of structures as design variables vary; the particle swarm optimization method is adopted for structural optimization. The proposed method can dramatically reduce the number of stay cables which need to be adjusted and ensure the main girder stresses remain in a reasonable state during stay cable adjustment progress by UDVM. Moreover, the proposed method can continuously update the objective function, constraint conditions, and design variables. Finally, this proposed optimization calculation method is applied to two different cable-stayed bridges to validate the reliability and feasibility of the method.

scholarly journals Study on Secondary Cable Adjustment for Cable-stayed Bridges Without back Cables

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Zengshou Sun ◽  
Xiaocong Liu ◽  
Jianfeng Ma
Keyword(s):  
Structural Deformation ◽  
Adjustment Process ◽  
Influence Matrix ◽  
Finite Element Software ◽  
Bridge Model ◽  
Cable Force ◽  
Dynamic Measuring ◽  
Force Variation ◽  
Force Difference ◽  
Cable Stayed Bridges

<p>The structure of cable-stayed bridge without back cable is a new breakthrough.In this paper, the cable adjustment process of linzhou yingbin bridge is studied. the whole bridge model is established using the finite element software MIDAS CIVIL.This paper compares the measured cable force with the designed cable force and gets range of cable force difference, The influence matrix method is used for the second cable adjustment to ensure that the stress and structural deformation in the process of cable adjustment are within the range of the design requirements.The cable force variation of the whole bridge is detected by dynamic measuring instrument to ensure the construction safety in the process of cable adjustment.</p><p> </p>

Cable force monitoring system of cable stayed bridges using accelerometers inside mobile smart phone

2015 ◽  
Author(s):  
Xuefeng Zhao ◽  
Yan Yu ◽  
Weitong Hu ◽  
Dong Jiao ◽  
Ruicong Han ◽  
...  
Keyword(s):  
Monitoring System ◽  
Smart Phone ◽  
Cable Force ◽  
Force Monitoring ◽  
Cable Stayed Bridges

scholarly journals Variational Mode Decomposition Based Time-Varying Force Identification of Stay Cables

2021 ◽  
Vol 11 (3) ◽  
pp. 1254
Author(s):  
Shitong Hou ◽  
Bin Dong ◽  
Jianhua Fan ◽  
Gang Wu ◽  
Haochen Wang ◽  
...  
Keyword(s):  
Good Effect ◽  
Time Varying ◽  
Variational Mode Decomposition ◽  
Stay Cable ◽  
Cable Tension ◽  
Force Identification ◽  
Stay Cables ◽  
Mode Decomposition ◽  
Cable Force ◽  
Cable Stayed Bridges

Stay cables are important structural members of cable-stayed bridges, which play a significant role in the health monitoring and assessment of cable-stayed bridges. The in-service cable force, which varies from the effects of vehicle load, wind load and other environmental factors, may cause fatigue damage in stay cables. Traditional force identification methods can only calculate the time-average cable force instead of the instantaneous force. A novel method has been proposed in this paper for identifying time-varying cable tension based on the variational mode decomposition (VMD) method. This recent method decomposes signals and adaptively estimates instantaneous frequency combined with the Hilbert–Huang transform method. In the proposed study, the time-varying modal frequencies were identified from stay cable acceleration data, and then the time-varying cable tension was identified by the relationship between cable tension and identified fundamental frequency. Scaled and full-scale models of stay cables were implemented successively to illustrate the validity of the proposed method. The results showed that the variational mode decomposition (VMD) method has a good effect on identifying the time-varying cable forces, even the sudden changes in cable force. According to the cable force identification results, the maximum error was 8.4%, which meets the actual application of time-varying cable force measurements. An on-site test was also implemented to monitor the cable force during a construction period, and the results showed that the proposed method can provide accurate real-time results for evaluation and decision-making.

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