Cable measures to improve structural rigidity of large span three-tower cable-stayed bridge on highspeed railway

2011 ◽  
Author(s):  
Lunxiong Yi ◽  
Meixin Ye ◽  
De Zhou
Keyword(s):  
Large Span ◽  
Cable Stayed Bridge ◽  
Structural Rigidity

Study on Structural Rigidity of Large Span Three-Tower Cable-Stayed Bridge on High-Speed Railway

2010 ◽  
Vol 163-167 ◽  
pp. 646-650
Author(s):  
Lun Xiong Yi ◽  
Ye Zhi Zhang ◽  
De Zhou
Keyword(s):  
High Speed ◽  
Great Influence ◽  
Stiffness Ratio ◽  
High Speed Railway ◽  
Large Span ◽  
Cable Stayed Bridge ◽  
Structural Rigidity ◽  
Bending Resistance ◽  
Tensile Forces ◽  
Tower Height

Based on Dongting Hu three-tower cable-stayed bridge on high-speed railway, stiffness ratio of middle tower to side tower (SROMTTST), vertical bending resistance stiffness (VBRS) of girder, height of tower, area of cable were studied by using FEM. The results show that the structure is more economical on condition of the SROMTTST less than 3.0. With the increase of VBRS of girder, the tensile forces of the cables near mid span increase and decrease near towers. Meanwhile, both the moments of the tower and the deflection of the girder get smaller. The ratio of tower height to span (ROTHTS) has great influence on the bridge rigidity. Every 0.01 increase of the ROTHTS can decrease a ratio of deflection to span (RODTS) about by 3%～5%.

Discussion on the Measurements in Cantilever Construction with Guyed Hanging Basket

2014 ◽  
Vol 580-583 ◽  
pp. 2797-2800
Author(s):  
Fang Ru Gui
Keyword(s):  
Reinforced Concrete ◽  
Construction Process ◽  
Large Span ◽  
Cable Stayed Bridge ◽  
Beam Segment ◽  
Development Direction ◽  
Operating Space ◽  
Cantilever Construction

Guyed hanging basket is qualified with reasonable structure , great carrying ability and clear construction process, and also can provide a good operating space for beam segment construction. Applying cantilever pouring construction with guyed hanging basket should be the development direction of the construction of large-span reinforced concrete cable-stayed bridge. By taking the girder construction of the grand bridge over Beijing-Hangzhou Canal as an example, this paper introduces the measurements in cantilever construction with guyed hanging basket, aiming at providing reference for other similar projects.

The Experimental Analysis of the Nonlinear Effects of Live Load of E-Dong Yangtze River Highway Bridge

2014 ◽  
Vol 587-589 ◽  
pp. 1672-1679
Author(s):  
Hui Ling Chen
Keyword(s):  
Geometric Nonlinearity ◽  
Yangtze River ◽  
Nonlinear Effects ◽  
Highway Bridge ◽  
Live Load ◽  
Load Effect ◽  
Large Span ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Actual Response

E-dong Yangtze River Highway Bridge is a compound double Tower Double Suspension Cable stayed bridge with a main-span of 926m. it has very distinctive geometric nonlinearity, which features as a long span, a high Tower, a soft construction, etc. in order to analyze how the geometric nonlinearity will affect the live load effect of large-span cable stayed bridge, we adopted the experimental results of the static experiments of the E-dong bridge to do a comparative analysis, during which all the calculation was based on the limited Factor theory. And the results showed that, the nonlinear results fit much better with the actual response of large-span cable stayed bridge, while the linear results produced a big difference.

Optimization Design of Large Span Cable-Stayed Bridge in High Seismic Risk Zone

2013 ◽  
Vol 353-356 ◽  
pp. 2015-2019
Author(s):  
Zhi Hua Xiong ◽  
Yun Cheng Feng ◽  
Song Lin Song ◽  
Jiang Bo Wang
Keyword(s):  
Optimization Design ◽  
Time History ◽  
Nonlinear Time History Analysis ◽  
Seismic Safety ◽  
Seismic Demands ◽  
Large Span ◽  
Cable Stayed Bridge ◽  
History Analysis ◽  
Ductile Steel ◽  
Nonlinear Time History

To ensure seismic safety of a large span cable-stayed bridge, two alternative pylon shapes and section types were studied. Nonlinear time history analysis was performed in the context. It is found that the A-shaped pylon is much stiffener than the H-shaped pylon in terms of deformation. The steel A-shaped pylon can significantly reduce the seismic demands of the key member including tower drift and moment. A ductile steel link between towers is proposed for the optimization of design in the paper. The A-shaped reinforced concrete tower with ductile steel link was proved to be a relatively balanced plan considering engineering, aesthetic and economic factors.

The Clever Use of Neutron-Axis of the Girder in the Stress Measurement of the Large Span PC Cable Stayed Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 1696-1701
Author(s):  
Yu Feng Xu
Keyword(s):  
Normal Stress ◽  
Stress Measurement ◽  
The Other ◽  
New Method ◽  
Construction Control ◽  
Large Span ◽  
Cable Stayed Bridge ◽  
Creep Coefficient ◽  
Horizontal Part ◽  
Cable Force

As the stress measurement of interior concrete is hard in the construction control of the cable- stayed bridge, a new method fitted for stress measurement in large span PC concrete cable-stayed bridge is proposed in this paper. This method is based on the principle that the normal stress in neutron-axis of girder is only decided by the horizontal part of the cable force. First, the normal stress on the neutron-axis of girder is calculated by the measured cable force, and then the creep coefficient is identified, and finally the other stresses are worked out. This method has been applied to a large span PC cable-stayed bridge constructed in process with favourable results and thus proves its accuracy and efficiency.

Study on Optimizing Design of Structural Rigidity of Super-Large Span Continuous Rigid Frame Bridge Using ANSYS

2012 ◽  
Vol 446-449 ◽  
pp. 1243-1247 ◽  
Author(s):  
Xing Wei Xue ◽  
Hong Yuan ◽  
Shan Qing Li
Keyword(s):  
Large Span ◽  
Continuous Rigid Frame Bridge ◽  
Structural Rigidity ◽  
Rigid Frame ◽  
Meaningful Result ◽  
Optimizing Design ◽  
Sutong Bridge ◽  
Rigid Frame Bridge ◽  
Midspan Deflection

In this paper, the situation of the midspan deflection of the span continuous rigid frame bridge is described, and the cause of the deflection is explained. It may be caused by the problem of the rigidity. Then the ANSYS is used to conduct analysis. The deflection of the biggest cantilever of the rigid frame bridge is the controlled target, and the optimizing design of the Sutong bridge is conducted. A meaningful result is obtained, and it provides a basis of the choice of the height of beams.

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