scholarly journals Free vibrations of simply-supported beam bridges under moving loads: Maximum resonance, cancellation and resonant vertical acceleration

2013 ◽  
Vol 332 (2) ◽  
pp. 326-345 ◽  
Author(s):  
P. Museros ◽  
E. Moliner ◽  
M.D. Martínez-Rodrigo
Keyword(s):  
Free Vibrations ◽  
Vertical Acceleration ◽  
Moving Loads ◽  
Simply Supported Beam ◽  
Simply Supported

RESONANT CURVES OF AN ELEVATED RAILWAY TO HARMONIC MOVING LOADS

2004 ◽  
Vol 04 (02) ◽  
pp. 237-257 ◽  
Author(s):  
YUNG-HSIANG CHEN ◽  
Z-MING SHIU
Keyword(s):  
Dynamic Characteristics ◽  
Viscoelastic Layer ◽  
Preliminary Design ◽  
Viscoelastic Foundation ◽  
Moving Loads ◽  
Parallel Beam ◽  
Simply Supported Beam ◽  
Simply Supported ◽  
Beam System ◽  
Two Sides

The fundamental dynamic characteristics of an elevated railway subjected to harmonic moving loads are investigated. The elevated ballast railway is analytically modeled as three different cases, with Case A indicating a simply-supported beam, Case B a two-parallel-beam system that is simply supported and inserted with a viscoelastic layer, and Case C an expansion of Case B through addition of two semi-infinite beams with viscoelastic foundation on two sides. The resonant conditions of these three cases are especially emphasized and studied in details. Finally, the resonant curves of an elevated railway to harmonic moving loads are presented, which are useful to railway engineers and may be used as preliminary design aids.

Finite Element Analysis on Dynamic Response of Bridge Structures under Moving Loads with Uniform Speed

2011 ◽  
Vol 90-93 ◽  
pp. 1015-1018
Author(s):  
Wen Zhang ◽  
De Can Yang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Dynamic Response ◽  
Moving Load ◽  
Moving Loads ◽  
Element Analysis ◽  
Simply Supported Beam ◽  
Simply Supported ◽  
The Finite Element Analysis ◽  
Bridge Structures

The dynamic response of simple supported beam under the moving load is analyzed. The finite element analysis software MIDAS is used to simulate the process of when the uniform constant force moving through the simply supported beam. The first 5 natural frequencies of simply supported beam are obtained with the modal analysis and compared with the analytical solution. The feasibility of the finite element method is verified.

Analysis of Vertical Dynamic Response of Simply Supported Beam Traversed by Successive Moving Loads

2014 ◽  
Vol 556-562 ◽  
pp. 751-754 ◽  
Author(s):  
Xiao Ping Wang ◽  
Ming Shui Li
Keyword(s):  
Dynamic Response ◽  
Damping Ratio ◽  
Amplification Coefficient ◽  
Vehicle Speed ◽  
Moving Loads ◽  
Maximum Displacement ◽  
Simply Supported Beam ◽  
Simply Supported ◽  
Calculation Results ◽  
Dynamic Amplification

In this paper, The vertical vibration’s analytical expression of Euler-Bernoulli beam traveled by moving loads is used to analyze the effect factors such as vehicle speed and damping ratio. The calculating program is made with MATLAB to analyze the dynamic response of a bridge as an illustrative example. A 32 meters simply supported beam traversed by moving loads of 8 ICE3 motor cars is analyzed. The calculation results show that the maximum displacement of the bridge appears at or near the mid-span and it has nothing to do with the position of the loads. The dynamic amplification coefficient of displacement at mid-span is not linearly increased with the vehicle speed improving. The damping ratio can decrease the dynamic response of the bridge dramatically, especially at the resonance speed.

Analytical Solution to Vertical Dynamic Response of Simply Supported Beam Bridge Traversed by Successive Moving Loads

2012 ◽  
Vol 178-181 ◽  
pp. 2345-2352 ◽  
Author(s):  
Zhi Jun Zhang ◽  
Jin Feng Wu ◽  
Li Zhong Song ◽  
Song Hua Ma ◽  
Xiao Zhen Li
Keyword(s):  
Analytical Solution ◽  
Dynamic Response ◽  
High Speed ◽  
Damping Ratio ◽  
Moving Loads ◽  
Simply Supported Beam ◽  
Railway Bridges ◽  
Simply Supported ◽  
High Speed Trains ◽  
Analytical Expressions

In this paper, vibration theory is used to deduce vertical vibration’s analytical expressions of Euler- Bernoulli beam traveled by moving loads. In the analytical expression, the influences of the train’s travelling speed ,the mode of vibration ,the mass and rigidity of beam itself and the damping ratio of the system are considered comprehensively. Then the calculating program is made with MATLAB to analyze the dynamic response of a bridge as an illustrative example, so as to check the correctness of the analytical solution. Then a 32 meters simply supported beam traversed by moving loads of 8 ICE3 motor cars is analyzed. The calculation results show that the analysis method in this paper can really give accurate results to the beam subjected to arbitrarily spacing loads . The analytical expressions can be applied to preliminary design of railway bridges and assessment of the expected maximum vibration levels under high-speed trains.

Analytical Solution for Vertical Dynamic Response of Railway Simply Supported Beam Bridge under Bidirectional Moving Loads

2012 ◽  
Vol 594-597 ◽  
pp. 1552-1556
Author(s):  
Wei Ye ◽  
Xiao Zhen Li ◽  
Hong Duan ◽  
Chun Sheng Shan ◽  
Xiao Han Liu
Keyword(s):  
High Speed ◽  
Vertical Vibration ◽  
Simulation Software ◽  
Dynamic Responses ◽  
Moving Loads ◽  
Simply Supported Beam ◽  
Double Line ◽  
Simply Supported ◽  
Numerical Result ◽  
Beam Bridge

In this thesis, the dynamic responses of simply supported beam bridge in a double-line railway under bidirectional moving loads are mainly studied. To study the characteristics of Euler- Bernoulli beam, a train is simplified as a series of concentrated forces with fixed wheelbase.Structural dynamics is used to deduce the analytical expressions of vertical vibration of simply supported beam under bidirectional moving loads. By simulation software MATLAB, the numerical result of the dynamic responses of simply supported beam bridge could be obtained. Then the 48 meters simply supported beam bridge in a high-speed railway is analyzed, the dynamic responses of simply supported beam of bidirectional moving loads with different interarrival times are discussed.Finally, some general laws for the design of double-line railway bridge are gained.

scholarly journals Study on the improvement of the torsional bracing system designing process for steel shaped I simply supported beam bridge

2021 ◽  
Vol 682 (1) ◽  
pp. 012045
Author(s):  
K V Nguyen ◽  
C A L Huynh ◽  
H D H Nguyen ◽  
N D Van ◽  
N T Nguyen ◽  
...  
Keyword(s):  
Simply Supported Beam ◽  
Simply Supported ◽  
Bracing System ◽  
Beam Bridge
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