Geometric Nonlinear Effect on Large Span Cable-Stayed Bridge

2014 ◽  
Vol 638-640 ◽  
pp. 942-946
Author(s):  
Shuang Rui Chen ◽  
Quan Sheng Yan
Keyword(s):  
Linear Method ◽  
Bending Moment ◽  
Nonlinear Effects ◽  
Element Model ◽  
Vertical Displacement ◽  
Displacement Effect ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Geometric Nonlinear ◽  
Main Girder

It is introduced that three main factors cause geometric nonlinear effects of long span cable-stayed bridge: large displacement effect, cable sag effect, and the combination of bending moment and axial force effect. The iteration method of geometrical nonlinear problem is also introduced. The bridge deformation was calculated by establishing a plane truss finite element model of a long-span single tower cable-stayed bridge under consideration of nonlinearity and compared with that done with linear method. It is concluded that nonlinearity influenced differently to the bending moment of main girder, the displacement of tower root and the vertical displacement of girder.

Longitudinal Vibration Control of Long-Span Railway Cable-Stayed Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 1795-1799
Author(s):  
De Shan Shan ◽  
Yuan He ◽  
Li Qiao
Keyword(s):  
Vibration Control ◽  
Longitudinal Vibration ◽  
Time History ◽  
Bending Moment ◽  
Element Model ◽  
Viscous Dampers ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Two Parameters ◽  
Main Girder

As the floating type cable-stayed bridge has no longitudinal constraint between the main girder and the pylon, it may cause the main girder a large longitudinal displacement and the root of tower a large longitudinal bending moment, and affect the normal use and safety of the bridge under the earthquake or the train braking. It is an important part of the design to select an appropriate vibration control scheme. Taking a long-span railway bridge for example, this paper build the finite element model and analyses the damping effect in the view of train braking, moreover, the present study also examines the dynamic behavior with focus on two parameters of damping coefficient C and damping exponent αof the viscous dampers through dynamic time-history analysis. The results show that setting viscous dampers with the reasonable parameters can reduce the vibration and the response of the bridge by train braking and have a good energy dissipation effect.

Geometric Nonlinear Analysis of Low-Pylon Cable-Stayed Bridge Based on Finite Element Method

2013 ◽  
Vol 353-356 ◽  
pp. 3664-3668
Author(s):  
Xiang Li ◽  
Yang Liu ◽  
Ai Feng Zhang
Keyword(s):  
Finite Element ◽  
Nonlinear Analysis ◽  
Element Model ◽  
Large Displacement ◽  
Liaoning Province ◽  
Dead Weight ◽  
Displacement Effect ◽  
Cable Stayed Bridge ◽  
Geometric Nonlinear ◽  
Geometric Nonlinear Analysis

Low-pylon cable-stayed bridge is a new style, which has developed rapidly in the 1980s. Changshan Bridge is the first cross-sea cable-stayed bridge in the cold area of China and is establishing in Dalian city of Liaoning province now. This paper takes this bridge as the background, analyzing the influence on structure of geometric nonlinearity. Cable sag and large displacement effect are considered in the analysis. And then, applying large common software-ANSYS to create finite element model to carry on the static calculation which are under the dead weight and secondary dead load, especially emphasize structure large displacement effect. At last, the linear and nonlinear analysis is made. Conclusions are obtained according to the comparison between those results. Study the feasibility of using ANSYS to realize geometric nonlinear analysis on structure.

Dynamic Characteristics of a Long-Span Cable-Stayed Bridge

2011 ◽  
Vol 480-481 ◽  
pp. 1496-1501
Author(s):  
Liu Hui
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Iteration Method ◽  
Natural Frequencies ◽  
Element Model ◽  
Vibration Modes ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Subspace Iteration ◽  
Floating System

In order to study the dynamic characteristics of a super-long-span cable-stayed bridge which is semi-floating system, the spatial finite element model of this cable-stayed bridge was established in ANSYS based on the finite element theory.Modal solution was conducted using subspace iteration method, and natural frequencies and vibration modes were obtained.The dynamic characteristics of this super-long-span cable-stayed bridge were then analyzed.Results showed that the super-long-span cable-stayed bridge of semi-floating system has long basic cycle, low natural frequencies, dense modes and intercoupling vibration modes.

scholarly journals Layout Optimization of Rail Expansion Joint on Long-Span Cable-Stayed Bridge for High-Speed Railway

2020 ◽  
Vol 2020 ◽  
pp. 1-15
Author(s):  
Xiaopei Cai ◽  
Wanli Liu ◽  
Kaize Xie ◽  
Wenjun Zhu ◽  
Xiyuan Tan ◽  
...  
Keyword(s):  
High Speed ◽  
Field Tests ◽  
Element Model ◽  
Longitudinal Force ◽  
Main Beam ◽  
Expansion Joint ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Small Resistance ◽  
Set Up

Continuous welded rail (CWR) has been widely applied to the Chinese high-speed railways. It is interesting to reduce the effect of rail longitudinal force on the long-span cable-stayed bridges. Taking the pile-soil interaction into account, the finite element model of CWR on the long-span cable-stayed bridge is established based on the bridge-track interaction theory. The rail longitudinal force can be reduced and the track stability can be improved significantly by installing Rail Expansion Joint (REJ). The layout scheme of REJ plays a controlling role on designing CWR on bridges. Results show that the unidirectional REJ should be laid on both ends of the long-span cable-stayed bridge. Switch rails of REJ are set up on the main beam, stock rails are laid on the simply supported beams and crossing over beam joints, and several-meter long small resistance fasteners need to be laid on the sides of stock rails to reduce the fixed pier longitudinal force near the main beam. The range of REJ laid on cable-stayed bridge is mainly determined by temperature, rail breaking, and seismic condition; the bending and braking loads have little influence on it. Multiple field tests are carried out to prove the validity of the numerical model and the design methodology.

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.

scholarly journals Optimization Method for Solving the Reasonable Arch Axis of Long-Span CFST Arch Bridges

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Xuesong Zhang ◽  
Ningyi Liang ◽  
Xiaohong Lu ◽  
Anbang Gu ◽  
Jidong Shan
Keyword(s):  
Yangtze River ◽  
Spline Interpolation ◽  
Bending Moment ◽  
Optimization Procedure ◽  
Element Model ◽  
Optimization Methods ◽  
Optimization Method ◽  
Steel Tube ◽  
Long Span ◽  
Arch Bridges

With the continuous construction of 500 m concrete-filled steel-tube (CFST) arch bridges such as the Bosideng Yangtze River Bridge and the Hejiang Changjiang Highway Bridge, the deviation between the dead pressure line and the arch axis produced by extant arch axis optimization methods increases. Therefore, an arch axis optimization method for long-span CFST arch bridges with a truss section must be designed. Following the optimization of the truss arch axis, this study develops the minimum section eccentricity method that aims to optimize the arch axis of long-span CFST arch bridges. To minimize the main tube eccentricity of the truss arch, the bending moment of the main tubes is reduced by applying the main tube eccentricity method iteratively in a finite element model. Afterward, a smooth and reasonable arch axis is fitted by applying a cubic spline interpolation function in MATLAB. The entire optimization procedure is performed using the Bosideng Yangtze River Bridge as an example. Compared with that of optimal arch axis line types (e.g., parabola and catenary) and other traditional arch axes, the bending moment of main tubes optimized by the proposed method is substantially lower and more uniformly distributed along the arch axis span. The mechanical properties of the finished bridge, including its strength, stiffness, and stability, are all improved, thereby verifying the feasibility of using the proposed method to optimize the arch axis of CFST arch bridges with a truss section.

Causes and control to lateral displacement of the main girder in the super-long-span cable-stayed bridge with transverse asymmetry dead load

Structures ◽  
2022 ◽  
Vol 37 ◽  
pp. 168-184
Author(s):  
Jinxiang Zhang ◽  
Mingjin Zhang ◽  
Xulei Jiang ◽  
Renan Yuan ◽  
Jisheng Yu ◽  
...  
Keyword(s):  
Lateral Displacement ◽  
Dead Load ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
And Control ◽  
Main Girder

Multi-Tower Effect Analysis of Long-Span Suspension Bridge

2010 ◽  
Vol 163-167 ◽  
pp. 1940-1944
Author(s):  
Xiao Yan Zheng ◽  
Zhuo De Feng ◽  
Yue Xu
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Bending Moment ◽  
Suspension Bridge ◽  
Finite Element Models ◽  
Performance Difference ◽  
Displacement Effect ◽  
Effect Analysis ◽  
Long Span ◽  
Behavior Study

As a new bridge system, mechanics behavior study on long-span multi-tower suspension is also very deficiency. The existence of center towers is the origin of performance difference between multi-tower suspension bridge and the traditional one. Based on the Midas/Civil platform, the paper takes a three tower suspension bridge as project reference, establishes finite element models of suspension bridge, which the main span is longer than one kilometer and towers from two to seven. Moreover, the structural property is analyzed separately, which bending moment and displacement effect of girder and tower along with the tower number changes is considered. Natural frequency differences of the model bridges are also paid attention on.

scholarly journals Seismic Response Mitigation of a Long-Span Tower Bridge with Two Types of Constraint System

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Li Xu ◽  
Qingfei Gao ◽  
Junhao Zheng ◽  
Chuanhui Ding ◽  
Kang Liu
Keyword(s):  
Element Model ◽  
Main Beam ◽  
Seismic Load ◽  
Viscous Damper ◽  
Viscous Dampers ◽  
Damping Effect ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Drift Frequency ◽  
Nonlinear Finite Element Model

The stress of the main tower of a cable-stayed bridge depends on the connection type between the tower and deck. In order to study the most suitable longitudinal damping mode for a long-span cable-stayed bridge. In this article, a nonlinear finite element model is established based on a large span concrete cable-stayed bridge with a main span of 680 m. Without considering the influence of the transverse constraint, the damping effect of the elastic connection device and the viscous damper is simulated when the longitudinal seismic load is input. The results show that the stiffness of the main beam is increased by installing the elastic connection device, so the longitudinal drift frequency of the main beam is increased, but the stiffness of the structure is not changed by installing the viscous damper. Both viscous dampers and elastic connection structures can reduce the longitudinal displacement of the beam end, but viscous dampers are more favorable for the stress of the main tower. In terms of damping effect, viscous dampers are more suitable for long-span cable-stayed bridges, but, in terms of economy and parameter control, elastic connection devices have more advantages.

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