Singular Function Models of a Simply Continuous Beam Bridge under a Moving Load

2012 ◽  
Vol 204-208 ◽  
pp. 2240-2243
Author(s):  
Jun Zhang ◽  
Ming Kang Gou ◽  
Chuan Liang ◽  
Xiao Lu Ni ◽  
Zi Wen Zhou
Keyword(s):  
Present Model ◽  
Dynamic Models ◽  
Moving Load ◽  
Dynamic Responses ◽  
Singular Function ◽  
Moving Mass ◽  
Continuous Beam ◽  
Concentrated Force ◽  
Continuous Beam Bridge ◽  
Beam Bridge

The system of a simply continuous beam was looked on as one span beam with several internal elastic supports of inexhaustible stiffness. There were two types of models such as the dynamic models by a moving concentrated force and by a moving mass. A three-span beam was introduced as example solved with the present model by a moving concentrated force and FEM, which verified that the present model was correct. Two cases of the example bridge by a moving concentrated force and by a moving mass were considered. The results indicate that mass of the moving load has little influence over the dynamic responses of the simply continuous beam bridge.

scholarly journals Nonstationary Random Vibration Performance of Train-Bridge Coupling System with Vertical Track Irregularity

2016 ◽  
Vol 2016 ◽  
pp. 1-19 ◽  
Author(s):  
Xiaozhen Li ◽  
Yan Zhu ◽  
Zhibin Jin
Keyword(s):  
Random Vibration ◽  
Mean Value ◽  
Dynamic Responses ◽  
Continuous Beam ◽  
Continuous Beam Bridge ◽  
Coupling System ◽  
Rail Irregularity ◽  
Track Irregularity ◽  
Beam Bridge ◽  
Vibration Performance

In order to study the random vibration performance of trains running on continuous beam bridge with vertical track irregularity, a time-domain framework of random analysis on train-bridge coupling system is established. The vertical rail irregularity is regarded as a random process. A multibody mass-spring-damper model is employed to represent a moving railway car and the bridge system is simulated by finite elements. By introducing the pseudo excitation algorithm into the train-bridge interaction dynamic system, expressions of the mean value, standard deviation, and power spectral density of the nonstationary random dynamic responses of bridge and vehicles are derived. Monte-Carlo simulations are implemented to validate the presented method. A comprehensive analysis of the train-bridge coupling system with vertical track irregularity is conducted focusing on the effect of the randomness of the vertical rail irregularity on the dynamic behavior of the running train and the three-span continuous concrete bridge. Moreover, stochastic characteristics of the indicator for assessing the safety and the riding quality of the railway cars running on continuous beam bridge are carried out, which may be a useful reference in the dynamic design of the bridge.

Construction of Fo Zhao Gui Dan Intercity Bridge Project in Guang Zhou

2014 ◽  
Vol 915-916 ◽  
pp. 133-136
Author(s):  
Xiang Hong Zhu ◽  
Zeng Bin Jiang
Keyword(s):  
Prestressed Concrete ◽  
Construction Method ◽  
Highway Bridge ◽  
Continuous Beam ◽  
Continuous Beam Bridge ◽  
Beam Bridge ◽  
The City

Construction of Fozhao intercity bridge in Guangzhou was a three-span prestressed concrete continuous beam bridge. The bridge adopted triangle hanging basket cantilever pouring construction method. The bridge mixed cable-stayed spans, H form tower and typical highway bridge elements. It spaned across the exiting transport hubs center, with modern and ethereal shape, and became a new landmark of the city.

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