scholarly journals Temporary Bearing Method in Construction of Continuous Beam Bridge Erected as Simply-Supported Beam

2018 ◽  
Vol 08 (04) ◽  
pp. 473-477
Author(s):  
Mehadi Hassan Rabby ◽  
Zhipei Guo ◽  
Miaoqiang Huang
Keyword(s):  
Continuous Beam ◽  
Simply Supported Beam ◽  
Simply Supported ◽  
Continuous Beam Bridge ◽  
Beam Bridge

Influences of Rail Expansion Joint on Jointless Turnout on Ballasted Continuous Beam Bridge

2011 ◽  
Vol 48-49 ◽  
pp. 611-616
Author(s):  
Rong Chen ◽  
Wang Ping ◽  
Bin Wang
Keyword(s):  
Longitudinal Force ◽  
Relative Displacement ◽  
Continuous Beam ◽  
Expansion Joint ◽  
Simply Supported ◽  
Continuous Beam Bridge ◽  
Ballasted Track ◽  
Expansion Range ◽  
Stress And Deformation ◽  
Beam Bridge

Based on turnout/bridge interaction principle and finite element method (FEM), an integrated turnout/beam/pier model of jointless turnout on ballasted track was established to analyze the influences of expansion joint on stress and deformation of the turnout. The results are concluded as follows: whether the rail expansion joint is set in front of or behind the turnout, expansion additional force of stock rail will be reduced greatly at the end of the beam; so do the expansion displacement of switch rail and nose rail, the stress of displacement restrictor and spacer block, rail break gap and the longitudinal force of one rail after the other rail broke. But when the expansion joint is set in front of the turnout, the pier’s longitudinal force of continuous beam bridge and the simply supported beam bridge (within the expansion range of the device) increase greatly. When the device is close to the turnout, longitudinal relative displacement of the stock rail to the girder also increases a lot. By comparison, it is more favorable to set the expansion joint behind the turnout, or to set the device at the both ends of the continuous beam, or to set the device at the ends of continuous beam rather than in the center of the span.

The Natural Frequency Calculation Method of Simply-Supported Beam in the Sunshine Temperature Field

2013 ◽  
Vol 394 ◽  
pp. 364-367
Author(s):  
Yong Chun Cheng ◽  
Yu Ping Shi ◽  
Guo Jin Tan
Keyword(s):  
Temperature Field ◽  
Calculation Method ◽  
Natural Frequencies ◽  
Bernoulli Model ◽  
Simply Supported Beam ◽  
Simply Supported ◽  
Frequency Calculation ◽  
Natural Frequency Calculation ◽  
Beam Bridge ◽  
T Beam

The related researches show that , the sunshine temperature field can cause the changes of the natural frequencies of the simply-supported beam. In order to recover the influence law of the temperature field on the natural frequencies, the calculation method of the natural frequencies of the simply-supported beam bridge is formed. First, according to the principles of stress equivalence, transform the sunshine temperature field to the partiality axis forces. Based on the Bernoulli model, the calculation method of the natural frequencies of the simply-supported beam under the partiality axis forces at both ends is formed. At last, take one simply-supported T beam as the object of numerical modeling and verify the validity and the reliability of this method.

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