Optimum Analysis of Main Girder with Box Cross-section Used in Cable-stayed Bridge

The Odawara Port Bridge is located at the mouth of Odawara Port. Selecting a bridge type that symbolized the entire project and blended well with the surrounding area was critical. To achieve this, an extra-dosed prestressed concrete box girder with a main span of 122 m was selected. Construction of this bridge type is the first in the world. Special characteristics of this bridge type are a lower tower height than that of a cable-stayed bridge, the use of a saddle at the top of the towers, and the incorporation of epoxy-coated strands for diagonal cables. The design of the various sections of the bridge was achieved by integrating the characteristic shape of the towers with cable profiles while establishing horizontal continuity with the main girder. As a result of the integration process, the following design objectives were adopted: (a) constant main girder depth; (b) inverted trapezoidal main girder cross section; (c) towers without a connecting beam at the top; (d) a fan-shaped saddle; (e) compact cable vibration dampers; (f) graded metallic coloring of cables; (g) integrated steel railing and road surface lighting; (h) nighttime bridge lighting, and (i) encased drainage pipes.

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Analysis of Stress Influence of Top Deck Thickness on Main Girder with Box Cross Section Used in Cable Stayed Bridge

ICLEM 2010 ◽

10.1061/41139(387)350 ◽

2010 ◽

Author(s):

Xialin Yang ◽

Yaping Wu ◽

Guoxiang Wei

Keyword(s):

Cross Section ◽

Cable Stayed Bridge ◽

Main Girder ◽

Stress Influence

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Mathematical Modeling for Lateral Displacement Induced by Wind Velocity Using Monitoring Data Obtained from Main Girder of Sutong Cable-Stayed Bridge

Mathematical Problems in Engineering ◽

10.1155/2014/723152 ◽

2014 ◽

Vol 2014 ◽

pp. 1-16

Author(s):

Gao-Xin Wang ◽

You-Liang Ding

Keyword(s):

Time Series ◽

Wind Velocity ◽

Lateral Displacement ◽

Third Order ◽

Nonlinear Correlation ◽

Cable Stayed Bridge ◽

Spectrum Density ◽

Combined Models ◽

Main Girder ◽

Correlation Term

Based on the health monitoring system installed on the main span of Sutong Cable-Stayed Bridge, GPS displacement and wind field are real-time monitored and analyzed. According to analytical results, apparent nonlinear correlation with certain discreteness exists between lateral static girder displacement and lateral static wind velocity; thus time series of lateral static girder displacement are decomposed into nonlinear correlation term and discreteness term, nonlinear correlation term of which is mathematically modeled by third-order Fourier series with intervention of lateral static wind velocity and discreteness term of which is mathematically modeled by the combined models of ARMA(7,4)and EGARCH(2,1). Additionally, stable power spectrum density exists in time series of lateral dynamic girder displacement, which can be well described by the fourth-order Gaussian series; thus time series of lateral dynamic girder displacement are mathematically modeled by harmonic superposition function. By comparison and verification between simulative and monitoring lateral girder displacements from September 1 to September 3, the presented mathematical models are effective to simulate time series of lateral girder displacement from main girder of Sutong Cable-Stayed Bridge.

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Fast Tracking the Pulau Poh Cable-stayed Bridge

IABSE Conference, Kuala Lumpur 2018: Engineering the Developing World ◽

10.2749/kualalumpur.2018.0601 ◽

2018 ◽

Author(s):

Chet Chie Voon ◽

Hiang Miang Goh ◽

Chuan Seng Koo

Keyword(s):

Cross Section ◽

Fast Track ◽

Rainfall Intensity ◽

Stay Cable ◽

Bridge Design ◽

Environmental Challenges ◽

High Rainfall ◽

Fast Tracking ◽

Cable Stayed Bridge ◽

Design Life

<p>The construction of the Pulau Poh cable-stayed bridge has been challenging both technically and environmentally. The curved pylon shape in two planes, with changing cross section and heavily congested reinforcement pose constructability concerns. Accurate geometry control and positioning of stay cable anchorages within the pylon is crucial to ensure the bridge meets its intended design life. Located in an area with high rainfall intensity presents additional environmental challenges, where working areas are constantly submerged. To address the challenges and meet the project deadline, innovative construction methodologies are being adopted. The bridge design was also revisited, taking into consideration the construction approach. This paper aims to explain the challenges faced and methods used to fast track the construction of the Pulau Poh cable-stayed bridge.</p>

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Case Study of Deep Learning Model of Temperature-Induced Deflection of a Cable-Stayed Bridge Driven by Data Knowledge

Symmetry ◽

10.3390/sym13122293 ◽

2021 ◽

Vol 13 (12) ◽

pp. 2293

Author(s):

Zixiang Yue ◽

Youliang Ding ◽

Hanwei Zhao ◽

Zhiwen Wang

Keyword(s):

Neural Network ◽

Machine Learning ◽

Deep Learning ◽

Prior Knowledge ◽

Learning Model ◽

Bridge Management ◽

Learning Network ◽

Cable Stayed Bridge ◽

Main Girder ◽

Deep Learning Model

A cable-stayed bridge is a typical symmetrical structure, and symmetry affects the deformation characteristics of such bridges. The main girder of a cable-stayed bridge will produce obvious deflection under the inducement of temperature. The regression model of temperature-induced deflection is hoped to provide a comparison value for bridge evaluation. Based on the temperature and deflection data obtained by the health monitoring system of a bridge, establishing the correlation model between temperature and temperature-induced deflection is meaningful. It is difficult to complete a high-quality model only by the girder temperature. The temperature features based on prior knowledge from the mechanical mechanism are used as the input information in this paper. At the same time, to strengthen the nonlinear ability of the model, this paper selects an independent recurrent neural network (IndRNN) for modeling. The deep learning neural network is compared with machine learning neural networks to prove the advancement of deep learning. When only the average temperature of the main girder is input, the calculation accuracy is not high regardless of whether the deep learning network or the machine learning network is used. When the temperature information extracted by the prior knowledge is input, the average error of IndRNN model is only 2.53%, less than those of BPNN model and traditional RNN. Combining knowledge with deep learning is undoubtedly the best modeling scheme. The deep learning model can provide a comparison value of bridge deformation for bridge management.

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Aerodynamic instability of a hinged-deck cross-section cable-stayed bridge

Journal of Wind Engineering and Industrial Aerodynamics ◽

10.1016/j.jweia.2020.104110 ◽

2020 ◽

Vol 198 ◽

pp. 104110

Author(s):

Elena Lopez-Nuñez ◽

Mikel Ogueta-Gutiérrez ◽

Raul Manzanares-Bercial ◽

Omar Gómez-Ortega ◽

Sebastián Franchini ◽

...

Keyword(s):

Cross Section ◽

Cable Stayed Bridge ◽

Aerodynamic Instability

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Wind tunnel tests of main girder with Π-shaped cross section

10.1063/1.5005191 ◽

2017 ◽

Author(s):

Junfeng Guo ◽

Chengjing Hong ◽

Shixiong Zheng ◽

Jinbo Zhu

Keyword(s):

Wind Tunnel ◽

Cross Section ◽

Wind Tunnel Tests ◽

Main Girder ◽

Shaped Cross Section

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Analysis of Thermal Effect on Girder with Side Main Rib Section

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.501-504.495 ◽

2014 ◽

Vol 501-504 ◽

pp. 495-500

Author(s):

Niu Jing Ma

Keyword(s):

Temperature Field ◽

Temperature Gradient ◽

Thermal Effect ◽

Cross Section ◽

Stress And Strain ◽

Cable Stayed Bridge ◽

The Common ◽

Equivalent Load ◽

Thermal Difference

According to the common girder with side main rib section of PC cable-stayed bridge with double cable planes, a computational model of two-dimension temperature field is presented. Temperature gradient of main rib, small longitudinal rib, top plate and flange plate was computed respectively, and then the stress and strain of each section are derived through plane cross-section assumption. For the cable-stayed bridge, member structure FEM is applied to compute node equivalent load and displacement, which resulted from both sunshine and seasonal thermal difference. Finally, a case study is analyzed, the results showed: computed and measured deflection of girder that result from thermal effect are very close, therefore, this method is feasible.

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Analysis on Reasonable Structure of Main Girder of Harp Shaped Cable-Stayed Bridge without Backstays

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.90-93.1061 ◽

2011 ◽

Vol 90-93 ◽

pp. 1061-1068

Author(s):

Ai Jun Chen ◽

Guo Jing He

Keyword(s):

Design Parameters ◽

Bridge Design ◽

Structure Selection ◽

Cable Stayed Bridge ◽

Design Philosophy ◽

Section Design ◽

Selection For ◽

Main Girder ◽

Cable Stayed Bridges

Harp shaped cable-stayed bridges without backstays are popular due to their beautiful and unique styles; they employ leaning tower columns to balance the constant and movable loads on the decks and are not provided with backstays, so they are beyond the traditional bridge design philosophy. In this paper, we discussed the reasonable structure of the main girder of Changsha Hongshan Bridge – a harp shaped cable-stayed bridge without backstays through changing the design parameters of the main girder in respect of design so as to provide important reference for design of this kind of bridges, and the research mainly related to such aspects as the structure selection for and section design of the main girder, the influence of overweight of main girder on the force on the structure, the length of non-cable area of the main girder, the span of auxiliary hole, etc.

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