scholarly journals Dynamic Characteristics of a Double-Pylon Cable-Stayed Bridge with Steel Truss Girder and Single-Cable Plane

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Yong Zeng ◽  
Yutong Zeng ◽  
Hao Yu ◽  
Yujie Tan ◽  
Hongmei Tan ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Structural Parameters ◽  
Load Test ◽  
Torsional Stiffness ◽  
Seismic Stability ◽  
Dead Load ◽  
Cable Stayed Bridge ◽  
Subspace Iteration ◽  
Steel Truss ◽  
Steel Truss Girder

The dynamic characteristics are closely linked to the seismic stability and wind-resistant of the bridge. But different bridge types have different dynamic characteristics. In order to study the dynamic characteristics of a double-pylon cable-stayed bridge with a single-cable plane and steel truss girder whose main span is the longest in the world, the dynamic load test was done, and the finite element and the subspace iteration methods were used to analyze the vibration mode of the bridge. The influence of different structural parameters on the dynamic characteristics of the bridge was analyzed. The changed structural parameters are cable layout, stiffness of steel truss girder, stiffness of stayed cables, stiffness of pylons, the concentration of dead load, number and location of auxiliary piers, and structural system. The results show that the bending and torsion resistance of the double-pylon cable-stayed bridge with a single-cable plane and steel truss girder is weak. The torsional stiffness of the cable-stayed bridge with a double-cable plane is stronger than that of the cable-stayed bridge with a single-cable plane. The seismic stability and wind-resistant of the bridge can be improved by using light dead load, improving the stiffness of pylon and girder, and adding auxiliary piers scientifically. However, the change of cable stiffness has a complex influence on the dynamic characteristics of the bridge. The conclusion can offer references for the construction, maintenance, and design of the same type of bridges.

The Dynamic Characteristics of Rigid Frame Single-Rib Arch Bridge

2013 ◽  
Vol 368-370 ◽  
pp. 1426-1430
Author(s):  
Li Xiong Gu ◽  
Rong Hui Wang
Keyword(s):  
Dynamic Characteristics ◽  
Bending Strength ◽  
Dynamic Properties ◽  
Structural Parameters ◽  
Bending Stiffness ◽  
Torsional Stiffness ◽  
Lateral Stiffness ◽  
Arch Bridge ◽  
Vertical Stiffness ◽  
Rigid Frame

In this paper, by establishing the finite element model to study the dynamic characteristics of rigid frame single-rib arch bridge. By respectively changing structural parameters of the span ratios, and the compressive stiffness of arch, and the bending stiffness of arch, and the bending stiffness of bridge girder, and the layout of boom to find out the regularity of the structure on lateral stiffness, and vertical stiffness, and torsional stiffness as well as dynamic properties, it come out the results of that lateral stiffness of the structure is weaker, and increasing the span ratios and the compressive strength of arch are conducive to the improvement of the overall stiffness, and improving the bending strength of arch and layout of boom are less effect on the overall stiffness and mode shape.

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.

Study on the Load Test of Xiangjiang Cable-Stayed Bridge

2013 ◽  
Vol 361-363 ◽  
pp. 1438-1441
Author(s):  
Yue Long Sun ◽  
Lei Wang
Keyword(s):  
Bearing Capacity ◽  
Mechanical Characteristic ◽  
Dynamic Characteristics ◽  
Working Condition ◽  
Load Test ◽  
Bridge Structure ◽  
Dynamic Tests ◽  
Cable Stayed Bridge ◽  
Actual Working ◽  
Static And Dynamic Tests

Xiangjiang Bridge is a newly built bridge. In order to understand the actual working condition and the bearing capacity of the bridge, the static and dynamic tests are carried out. This paper describes the principles and methods of the load test and the measurement of the stiffness and dynamic characteristics of the bridge structure. Through analyzing the test, the data and information of bridge can be accumulated and the mechanical characteristic of this kind of bridge is discussed.

scholarly journals Dynamic Characteristics Analysis and Experimental Verification of Long Span Suspension Bridge

2021 ◽  
Vol 272 ◽  
pp. 01019
Author(s):  
Guojun Yang ◽  
Qiwei Tian ◽  
Guangwu Tang ◽  
Longlong Li ◽  
Su Ye ◽  
...  
Keyword(s):  
Dynamic Characteristics ◽  
Vibration Frequency ◽  
Natural Vibration ◽  
Structural Parameters ◽  
Great Influence ◽  
Suspension Bridge ◽  
Natural Vibration Frequency ◽  
Vibration Modes ◽  
Dead Load ◽  
Long Span

The dynamic characteristics of long-span suspension bridges are complex. The natural vibration frequency is changed with different structural parameters, and the sensitivity to different parameters is different. In order to solve this problem, the spatial model of a long-span suspension bridge was established by using finite element software, and the first 20 natural vibration periods, natural vibration frequencies and vibration modes were analyzed and calculated. The accuracy of the obtained natural vibration frequency data was verified through field tests. Finally, based on the model, the stiffness of structural components is studied by one -factor-at-one-time, and the influence of various variables on the frequency and mode of a certain mode is studied by one-factor-at-one-time method. The results show that different structural parameters have different effects on the vibration frequency. When the stiffness of stiffening girder and main tower is changed, with the increase of stiffness, the variation of frequency mostly presents an upward trend, and the range is large. With the change of the secondary dead load, most of the frequencies decrease first and then tend to be stable. It can be seen from the field test results that the vibration shapes and frequencies measured by numerical simulation and test are close to each other, which can meet the requirements of engineering precision. The stiffness of the main cable and the main tower has a great influence on the modes and periods corresponding to them. The increase of the secondary dead load can reduce the natural vibration frequency of the suspension bridge, but it is not unlimited to increase the secondary dead load to reduce the frequency. The stiffness of the stiffening girder has a great influence on the frequency of the suspension bridge. When the bending stiffness of the stiffening girder increases to 3 times of the original one, the order of vibration modes of the structure will change. The research results can provide references for structural design and dynamic parameter adjustment of long-span suspension bridge.

Construction of Qiansimen Birdge - Partial Cable-Stayed Bridge with Steel Truss Girder

2013 ◽  
Vol 405-408 ◽  
pp. 3113-3118
Author(s):  
Yong Tao Zhang ◽  
Song Du ◽  
Xin Peng You ◽  
Cheng Ming Peng
Keyword(s):  
Cable Stayed Bridge ◽  
Chongqing City ◽  
Steel Truss ◽  
Steel Truss Girder

Qiansimen Bridge is a partial cable-stayed bridge with steel truss girder under building in Chongqing city, China, which will carry 4 vehicle lanes and 2 urban rails. Several general erection schemes of the steel truss are proposed and compared. Based on this, the erection scheme of steel truss at the non-cable area near the tower, the side span area and of the standard segment are discussed, which could be referred by for similar engineering.

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
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