Experimental study on deformation characteristics of ballastless tracks under downward bending deformation of long-span cable-stayed bridge

2020 ◽  
Vol 210 ◽  
pp. 110363
Author(s):  
Weiqi Zheng ◽  
Xingwang Sheng ◽  
Zhihui Zhu ◽  
Hongqiang He
Keyword(s):  
Experimental Study ◽  
Deformation Characteristics ◽  
Bending Deformation ◽  
Cable Stayed Bridge ◽  
Long Span

Random dynamic analysis on a high-speed train moving over a long-span cable-stayed bridge

2021 ◽  
pp. 1-21
Author(s):  
Senrong Wang ◽  
Jun Luo ◽  
Shengyang Zhu ◽  
Zhaoling Han ◽  
Guotang Zhao
Keyword(s):  
Dynamic Analysis ◽  
High Speed ◽  
High Speed Train ◽  
Cable Stayed Bridge ◽  
Long Span

Experimental study of bending interface characteristics of CFRP-strengthened long-span steel main beams at different temperatures

2021 ◽  
Vol 235 ◽  
pp. 111932
Author(s):  
Rumin Teng ◽  
Yongchang Guo ◽  
Hongyu Wang ◽  
Zhe Zhao ◽  
Xin Wang
Keyword(s):  
Experimental Study ◽  
Long Span ◽  
Interface Characteristics ◽  
Different Temperatures

Structure-borne noise from long-span steel truss cable-stayed bridge under damping pad floating slab: Experimental and numerical analysis

2020 ◽  
Vol 157 ◽  
pp. 106988 ◽  
Author(s):  
Lin Liang ◽  
XiaoZhen Li ◽  
Jing Zheng ◽  
KangNing Lei ◽  
Hongye Gou
Keyword(s):  
Numerical Analysis ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Steel Truss

Bending deformation characteristics of actuator with anion exchange polymer membrane and polyaniline electrode

2012 ◽  
Vol 21 (6) ◽  
pp. 704-708 ◽  
Author(s):  
Shin Woo Lee ◽  
Su Nam You ◽  
Suck-Hyun Lee ◽  
Jae Young Jho
Keyword(s):  
Anion Exchange ◽  
Polymer Membrane ◽  
Deformation Characteristics ◽  
Bending Deformation

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.

Correlation Study on Modal Frequency and Temperature Effects of a Cable-Stayed Bridge Model

2012 ◽  
Vol 446-449 ◽  
pp. 3264-3272 ◽  
Author(s):  
Li Min Sun ◽  
Yi Zhou ◽  
Xue Lian Li
Keyword(s):  
Experimental Study ◽  
Boundary Conditions ◽  
Dynamic Properties ◽  
Bridge Engineering ◽  
Fe Model ◽  
Steel Cable ◽  
Transverse Beam ◽  
Expansion Joints ◽  
Cable Stayed Bridge ◽  
Bridge Model

In recent years, structural health monitoring has been paid more and more attention in bridge engineering community. Previous researches showed that ambient temperature was one of principal factors affecting structural modal parameters in long-term. In this paper, an experimental study on correlation between dynamic properties of a cable-stayed bridge and its structural temperature was performed under temperature controlled laboratory environment. Using hammer impacting method, a dynamic testing was conducted based on a steel cable-stayed bridge model which had a span layout of 0.9+1.9+0.9m. During the experiment, the first six vertical bending modes under the environmental temperature of 0, 20 and 40°C were identified with the consideration of three kinds of boundary conditions at the deck’s ends as to two degrees of freedom, i.e. the longitudinal translation (UX) and the rotation about the transverse beam (RotZ). The above boundary conditions are UX & RotZ not constrained, UX constrained only and UX & RotZ constrained, attempting to simulate the different conditions of the bridge expansion joints. The efforts were paid to explain the physical mechanism of the results based on the updated FE model. This experimental study indicates a tendency that the frequency of the cable-stayed bridge model decreases with the increase of temperature. And furthermore, the relative difference of frequencies between 0 and 40 °C is affected by boundary conditions; in other words, when the deck is free to expand, the variation of model’s frequencies is smaller than that when the deck is restrained to expand, which is similar to the condition of the bridge’s expansion joints cannot work as normal. This experimental study can give some reference to the research of SHM and damage identification for cable-stayed bridges.

Dynamic Property Evaluation of a Long-Span Cable-Stayed Bridge (Sutong Bridge) by a Bayesian Method

2018 ◽  
Vol 19 (01) ◽  
pp. 1940010 ◽  
Author(s):  
Yan-Chun Ni ◽  
Qi-Wei Zhang ◽  
Jian-Feng Liu
Keyword(s):  
Natural Frequency ◽  
Dynamic Characteristics ◽  
Structural Damage ◽  
Dynamic Properties ◽  
Modal Identification ◽  
Modal Parameters ◽  
Modal Parameter ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
Sutong Bridge

Modal identification aims at identifying the dynamic properties including natural frequency, damping ratio, and mode shape, which is an important step in further structural damage detection, finite element model updating, and condition assessment. This paper presents the work on the investigation of the dynamic characteristics of a long-span cable-stayed bridge-Sutong Bridge by a Bayesian modal identification method. Sutong Bridge is the second longest cable-stayed bridge in the world, situated on the Yangtze River in Jiangsu Province, China, with a total length of 2 088[Formula: see text]m. A short-term nondestructive on-site vibration test was conducted to collect the structural response and determine the actual dynamic characteristics of the bridge before it was opened to traffic. Due to the limited number of sensors, multiple setups were designed to complete the whole measurement. Based on the data collected in the field tests, modal parameters were identified by a fast Bayesian FFT method. The first three modes in both vertical and transverse directions were identified and studied. In order to obtain modal parameter variation with temperature and vibration levels, long-term tests have also been performed in different seasons. The variation of natural frequency and damping ratios with temperature and vibration level were investigated. The future distribution of the modal parameters was also predicted using these data.

Multimode flutter of long-span cable-stayed bridge based on 18 experimental aeroelastic derivatives

2008 ◽  
Vol 96 (1) ◽  
pp. 83-102 ◽  
Author(s):  
Shambhu Sharan Mishra ◽  
Krishen Kumar ◽  
Prem Krishna
Keyword(s):  
Cable Stayed Bridge ◽  
Long Span
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