Research on Cable Force Testing Method of Cable-Stayed Bridge Model Test

2013 ◽  
Vol 351-352 ◽  
pp. 1325-1330
Author(s):  
Yan Qiang Li ◽  
Yan Liang Du
Keyword(s):  
Model Test ◽  
Element Model ◽  
Test Model ◽  
Cable Stayed Bridge ◽  
Testing Method ◽  
Stay Cables ◽  
Bridge Model ◽  
Cable Force ◽  
Method Of Measurement ◽  
Main Component

A new method of measurement of the cable force in cable-stayed bridge model test is introduced. Pressure ring sensor is used as the main component in this method and the tension of the stay cables can be measured real-time and in time. It is vertified that this method is exact and credible by model test and can be used in actual cable-stayed bridge. The static measurements for the test model are conducted. The testing results are compared with the numerical results of finite element model developed for the test model. A platform is established for the future researchs.

Influence of Cable Dampers on Cable-Stayed Bridges

2012 ◽  
Vol 256-259 ◽  
pp. 1474-1479
Author(s):  
Dong Liang ◽  
Hui Cai Shen ◽  
Yan Feng Li
Keyword(s):  
Finite Element ◽  
Element Model ◽  
Test Model ◽  
Cable Stayed Bridge ◽  
Modal Damping ◽  
Mode Method ◽  
Practical Model ◽  
The Relationship ◽  
Theoretical Results ◽  
Cable Stayed Bridges

Cable-stayed bridges have seen a wider application in recent years, with many having longer and longer spans. Modern cable-stayed bridges are using numerous cables to support the stiffing girders. Many cable dampers are installed to mitigate cable vibration. This paper focuses the attention on the effect of cable damper on the dynamic characteristics of the whole cable-stayed bridge, especially the modal damping. A practical model comprised of the cable, girder, and damper is developed to analyze the relationship between system modal damping and the performance of cable damper with complex mode method. A test model with cable, girder and damper was made to verify the theoretical results. A finite element model of a simplified cable-stayed bridge based on test model is adopted to assess the effects of cable dampers on the anti-seismic performance and wind-resistant behavior of the cable-stayed bridge. The results show that the cable dampers of cable-stayed bridge can increase the modal damping of the whole bridge.

PERFORMANCE VARIATIONS OF A CABLE-STAYED BRIDGE WITH DAMAGED CABLES

2013 ◽  
Vol 13 (05) ◽  
pp. 1250083 ◽  
Author(s):  
OU YANG ◽  
HUI LI ◽  
JINPING OU ◽  
Q. S. LI
Keyword(s):  
Yellow River ◽  
Dynamic Performance ◽  
Element Model ◽  
Model Tests ◽  
Experimental Results ◽  
Detailed Model ◽  
Cable Stayed Bridge ◽  
Bridge Model ◽  
Internal Forces ◽  
Cable Damage

A cable-stayed bridge model was made based on the design drawings of Shandong Binzhou Yellow River Highway Bridge (BZB) and detailed model tests were conducted. In the tests, the cable damage effects on the loading behavior and dynamic performance of the bridge model were studied by considering different cable damages' locations, different numbers of damaged cables, and different damaged levels of cables etc. The experimental results revealed that the cable damages may significantly affect the internal forces of other cables and the stress distributions of the girders; however, they have less influence on the natural frequencies of the bridge model. In parallel with the model tests, a finite element model of the bridge structure has been established. Numerical analysis for the bridge model with cable damages was carried out to validate the experimental results and explain the phenomena observed in the model tests.

Research on Horizontal Scheme for Multi-Pylon Cable-Stayed Bridge

2012 ◽  
Vol 446-449 ◽  
pp. 1217-1220
Author(s):  
Yue Qiang ◽  
Li Li ◽  
Peng Cheng Li ◽  
He Jian
Keyword(s):  
Comparative Analysis ◽  
Mechanical Behavior ◽  
Element Model ◽  
Model Analysis ◽  
Simplified Model ◽  
Longitudinal Displacement ◽  
Cable Stayed Bridge ◽  
Cable Force ◽  
Midspan Deflection

Longitudinal assembled stiffness is the biggest problem for multi-pylon cable-stayed bridge. The longitudinal displacement and midspan deflection could be effectively controlled by setting horizontal cable at the top of pylon of multi-pylon cable-stayed bridge. This paper obtains the area and the cable force change formula of the horizontal cable through simplified model analysis of the mechanical behavior of setting horizontal cable at the top of pylon. The comparative analysis is performed by application of finie element model to discuss the effect of setting horizontal cable at the top of pylon of multi-pylon cable-stayed bridge.

Study on Orthotropic Deck Plate Fatigue Test Model Scheme of Box Girder of Railway Cable-Stayed Bridge

2013 ◽  
Vol 361-363 ◽  
pp. 1199-1205 ◽  
Author(s):  
Bing Han ◽  
Qian Hui Pu ◽  
Zhou Shi ◽  
Li Qiang Gao ◽  
Yang Zhou
Keyword(s):  
Fatigue Test ◽  
Model Test ◽  
Test Scheme ◽  
Test Model ◽  
Box Girder ◽  
Cable Stayed Bridge ◽  
Steel Box Girder ◽  
Deck Plate ◽  
Fatigue Model ◽  
Model Scheme

Yongjiang railway extra long-span cable-stayed bridge uses the orthotropic deck of steel box girder, and it is the first time that box girder used in the railway cable-stayed bridge, so it is necessary to do a research on the mechanics behavior of this structure with fatigue model test. The accuracy of the fatigue model test data results in the rationality of the test scheme, and the research contents of the test scheme are as follows: the finite element model of steel box girder has been built to analysis the characteristics of the stress distribution, and the fatigue-sensitive regions have been determined; three model schemes have been designed and compared under the principles of stress equivalence and economical efficiency , and the third model has been used as the final fatigue test model . The research result can provide reference for the design of fatigue test model scheme of the same kind of bridge.

Mechanical Analysis of the Anchorage Zone of Pylon for Xinjiang Cable-Stayed Bridge Based on Refined Finite Element Model

2013 ◽  
Vol 663 ◽  
pp. 172-176
Author(s):  
Liang Dong Zhu ◽  
Zhi Zhou Bai ◽  
De Wei Chen
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Mechanical Performance ◽  
Element Model ◽  
Mechanical Analysis ◽  
Horizontal Component ◽  
3D Finite Element ◽  
Cable Stayed Bridge ◽  
Cable Force ◽  
Cable Forces

The Pylon of Xinjiang Cable-Stayed Bridge has a special geometric form, of which the anchorage zone adopts the steel-concrete composite structure with built-in steel anchorage box. To investigate the mechanical behavior, the refined 3D finite element model has been established with the shear nails of steel anchorage box simulated. The stress conditions of steel anchorage box and concrete under prestressing bar and stayed cable forces have been then studied. The bearing proportion at the anchorage zone for the horizontal component of cable force has been calculated. Results indicate that the overall mechanical performance of the anchorage zone is excel, which can be a reference for designing of similar structure.

scholarly journals Karnali Cable-Stayed Bridge: Development of Finite Element Model and Free Vibration Analysis

2014 ◽  
Vol 10 (1) ◽  
pp. 14-24
Author(s):  
Bipin Shrestha
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Equilibrium Configuration ◽  
Three Dimensional ◽  
Free Vibration Analysis ◽  
Element Model ◽  
Dead Load ◽  
Cable Stayed Bridge ◽  
Bridge Model ◽  
The Dead

This paper describes an analytical investigation on Karnali cable stayed bridge across the Karnali River. The primary objective of the investigation is to develop a three dimensional finite element model capable of representing essential feature of the long span cable-stayed bridge. Various parametric studies on the simple cable-stayed bridge model are performed before the actual development of a complex three dimensional model. Deformed equilibrium configuration due to the dead load is calculated using the cable tension and applied dead loads. Importance of incorporating large displacement geometric nonlinearity during the dead load deformed equilibrium configuration is analyzed .Starting from the deformed equilibrium configuration; modal analysis of the bridge is carried out. Different observed modes are classified based on the dominant modal components. Comparisons of the global modal behavior using the two separate models utilizing different cable modeling techniques are made. Parametric study on effect of cable local vibration and the modeling of deck concrete of the composite deck on overall global modal characteristics is presented.  DOI: http://dx.doi.org/10.3126/jie.v10i1.10873Journal of the Institute of Engineering, Vol. 10, No. 1, 2014 pp. 14-24

Analysis of Cable-Stayed Bridge for APDL-Based Optimization

2011 ◽  
Vol 243-249 ◽  
pp. 1567-1572
Author(s):  
Tao Zhang ◽  
Hai Feng Bai
Keyword(s):  
Parametric Design ◽  
Element Model ◽  
Internal Force ◽  
Steel Tube ◽  
Computational Time ◽  
Cable Stayed Bridge ◽  
Dead State ◽  
Limit Value ◽  
Cable Force ◽  
Cable Forces

Optimum design for a cable-stayed bridge structure is very complicated because of large number of design variables. Use of ANSYS parametric design language in optimizing such structure consumes little computational time. The finished dead state analysis for single pylon double cable plane cable-stayed bridge with 120m long is performed. Mechanics equivalent are developed for the main pylon with concrete-filled steel tube. Prestress girder finite element model is established also. The theory of minimum bending strain energy is used in deriving the objective function as the quadratic form of the post-tensioning cable forces. In addition, the maximum deflection of the pylon and the maximum stresses of the main girder are both implemented in the optimization model. Optimized cable forces are found by optimization. Calculated results show that after the optimization, the cable force slightly changes, yet the internal force state under dead load remarkably improves, the bending stress of girder as well as the deflection of pylon significantly decreases. All these variations are satisfied for the limit value of engineering code. The results obtained revealed that the method presented indeed leads to optimal structural performance for the cable-stayed bridge in particular, and might be a useful reference for the design of other similar bridges.

Design of Static Test Model for Three-Tower Cable-Stayed Self-Anchored Suspension Composed Bridge

2011 ◽  
Vol 243-249 ◽  
pp. 1528-1535
Author(s):  
Yu Zhao ◽  
Yong Jun Zhou ◽  
Jing Sun ◽  
Jin Tao Tang ◽  
Xu Li
Keyword(s):  
Complex System ◽  
Finite Element ◽  
Element Model ◽  
Test Model ◽  
Test Results ◽  
Static Test ◽  
Whole Process ◽  
Aesthetic Appearance ◽  
Load Carrying ◽  
Novel Structures

Cable-stayed self-anchored suspension composed bridges have novel structures and aesthetic appearance with complex system and difficulty for design and construction. In order to acquire a better knowledge of the load-carrying capability of this type of bridges, based on a real bridge and the theory of abnormal similarity, a full-bridge scaled down(1:20) test model was built to simulate the whole process of construction. The test results were preferably fit the theoretical calculation value. It can be seen that the design of the bridge was reasonable, and the accuracy of the calculation of finite element model was verified at the same time. The test and the related results can be used as the reference for the test and design of the similar bridges.

Nonlinear Analysis of Cable-Stayed Bridge

2014 ◽  
Vol 587-589 ◽  
pp. 1558-1562
Author(s):  
Hai Hong Mo
Keyword(s):  
Quantitative Analysis ◽  
Nonlinear Analysis ◽  
Large Deformation ◽  
Influence Factor ◽  
Basic Theory ◽  
Main Beam ◽  
Deformation Effect ◽  
Cable Stayed Bridge ◽  
Cable Force

The nonlinear basic theory and nonlinear influence factor of cable-stayed bridge has been introduced. Quantitative analysis to the sag effect, beam-column effect and large deformation effect has been done based on a cable-stayed bridge. Analysis show that the sag effect, beam-column effect and large deformation effect of cable force is not obvious, but the sag effect should not been ignored in the calculation of the main beam.

Study on the Effective Slab Width of Composite Cable-Stayed Bridge under Axial Force

2012 ◽  
Vol 568 ◽  
pp. 200-203
Author(s):  
Xiang Nan Wu ◽  
Xiao Liang Zhai ◽  
Ming Min Zhou
Keyword(s):  
Axial Force ◽  
Shear Lag ◽  
Distribution Law ◽  
Slab Width ◽  
Cable Stayed Bridge ◽  
Stay Cables ◽  
Transmission Angle ◽  
Effective Flange Width ◽  
Width Coefficient ◽  
Cable Stayed Bridges

There exist evident shear-lag phenomena in large-span composite cable-stayed bridges under the action of axial force, especially in the deck with double main girders. In order to discuss the distribution law of the effective flange width coefficient along the span, caused by axial force, finite element computations of five composite cable-stayed bridges and theoretical analysis have been performed. The transmission angle of axial force caused by the axial compression of stay cables was given, meanwhile the formulas for computation effective slab width coefficient under axial force were suggested.

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