scholarly journals Seismic vulnerability assessment of a continuous steel box girder bridge considering influence of LRB properties

Sadhana ◽  
2018 ◽  
Vol 43 (1) ◽  
Author(s):  
Tae-Hyung Lee ◽  
Duy-Duan Nguyen
Keyword(s):  
Vulnerability Assessment ◽  
Seismic Vulnerability ◽  
Continuous Steel ◽  
Box Girder ◽  
Seismic Vulnerability Assessment ◽  
Steel Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Steel Box Girder Bridge

Research on Surface Cracks Identification of Continuous Steel Box Girder Bridge by Wavelet Analysis of the Strain Mode

2012 ◽  
Vol 178-181 ◽  
pp. 2509-2512
Author(s):  
De Qing Guan ◽  
Hong Wei Ying ◽  
Xiao Lin Zhong
Keyword(s):  
Three Dimensional ◽  
Haar Wavelet ◽  
Continuous Steel ◽  
Surface Cracks ◽  
Box Girder ◽  
Strain Mode ◽  
Steel Box Girder ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Steel Box Girder Bridge

The paper chose a three-span continuous steel box girder bridge with horizontal semicircular surface cracks as research object, and the cracks are non-through and unsymmetrical. Solving strain modal parameters of beams with cracks by means of the three-dimensional finite element theory, and applying continuous wavelet transform (CWT) to analyze the strain mode by Haar wavelet, then the position of the cracks could be identified by the maximum of wavelet coefficients. The validity of the method has been proved by numerical calculation and analysis. Some useful conclusions for continuous steel girders bridge have been drawn and it has been useful in surface flaw identification and diagnosis in structures.

scholarly journals Research on structural dynamic characteristics of continuous steel box girder-bridge with lager ratio of wide-span

2018 ◽  
Vol 17 ◽  
pp. 03008
Author(s):  
Haijun Yin ◽  
Ziqing Li ◽  
Xianwu Hao
Keyword(s):  
Dynamic Properties ◽  
Element Model ◽  
Continuous Steel ◽  
Structural Dynamic ◽  
Box Girder ◽  
Steel Box Girder ◽  
Structural Dynamic Characteristics ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Steel Box Girder Bridge

Structure natural frequency and mode of vibration can not only reflect the structure modal parameters of dynamic properties, but also incarnate the dynamic evaluation characteristics of bridge structure. This paper applies ANSYS to establish the finite element model based on a continuous steel box girder bridge in order to obtain the corresponding modal analysis parameters. Through the environmental stimulation test, The results show that height of the steel box girder and the setting of diaphragm plate is reasonable, transverse space of piers not merely provide enough support but also ensure lateral stability of the bridge, as well as offering aside the maximum lateral clearance of the existing road. Meanwhile, the calculation results have important engineering practical values. which can provide basic data for the design, construction and maintenance of similar Bridges.

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