DYNAMIC RESPONSE EVALUATION OF THREE SPANS CONTINUOUS GIRDER BRIDGE ADJACENT TO RIGID FRAME UNDER THE 2018 NORTHERN OSAKA-FU EARTHQUAKE GROUND MOTION

2020 ◽  
Vol 76 (4) ◽  
pp. I_227-I_236
Author(s):  
Yasuyuki NAKANISHI ◽  
Satoshi UCHIDA ◽  
Sachiho KAWABE ◽  
Satoru YAGI ◽  
Masayuki YAMADA ◽  
...  
Keyword(s):  
Dynamic Response ◽  
Ground Motion ◽  
Earthquake Ground Motion ◽  
Response Evaluation ◽  
Rigid Frame ◽  
Continuous Girder Bridge ◽  
Girder Bridge

Performance of a Rigid Frame Arch Bridge under Near-Fault Earthquake Ground Motion

2011 ◽  
Vol 250-253 ◽  
pp. 1869-1872 ◽  
Author(s):  
Yong Huang ◽  
Jun Jie Wang ◽  
De Yin Jin
Keyword(s):  
Wenchuan Earthquake ◽  
Ground Motion ◽  
Strong Ground Motion ◽  
Earthquake Ground Motion ◽  
Weak Links ◽  
Response Analysis ◽  
Arch Bridge ◽  
2008 Wenchuan Earthquake ◽  
Rigid Frame ◽  
Strong Ground

During May 12th 2008 Wenchuan earthquake with the magnitude of 8.0, a 4-span rigid frame arch bridge named as Xiaoyudong Bridge which situated close to the epicenter was hit by strong ground motion and was severely damaged. The earthquake response analysis of the bridge was made using FE software MIDAS based on recorded ground motion during the Wenchuan earthquake in this paper. The study showed that the main and minor arch legs on the both ends piers were weak links which may be damaged firstly under strong ground motion. The next damage at the pier with weakest horizontal stiffness is one of the important reasons causing the bridge collapsed. This paper will introduce our work on those respects and some drawn conclusions.

Dynamic Response of Bridge Girder and Shear Keys Subjected to Pounding during Earthquakes

2013 ◽  
Vol 339 ◽  
pp. 515-519
Author(s):  
Lu He ◽  
Lu Zhang ◽  
Jia Yong Chen ◽  
Chu Dong Pan ◽  
Yu Xiang Liu
Keyword(s):  
Dynamic Response ◽  
Three Dimensional ◽  
The Finite Element Method ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Movement Characteristics ◽  
Shear Keys ◽  
Continuous Girder Bridge ◽  
Bridge Girder ◽  
Girder Bridge

Shear keys have been widely used to control the damage in abutments and piles during earthquakes. To investigate the dynamic response of bridge girder and traverse shear keys subjected to pounding, a three dimensional model of continuous girder bridge is developed in this study. With the assistance of the finite element method program ANSYS and the package LS-DYNA, the pounding between bridge girder and shear keys is simulated. Subsequently, the stress and displacement responses of the model are analyzed, and the movement characteristics are presented.

scholarly journals The Application of the Grey Neural Network in the Deflection Control of PC Rigid Frame Continuous Box Girder Bridges

2014 ◽  
Vol 8 (1) ◽  
pp. 416-419
Author(s):  
Lifeng Wang ◽  
Hongwei Jiang ◽  
Dongpo He
Keyword(s):  
Neural Network ◽  
Prestressed Concrete ◽  
Control Process ◽  
Construction Control ◽  
Box Girder Bridges ◽  
Girder Bridges ◽  
Rigid Frame ◽  
Continuous Girder Bridge ◽  
Girder Bridge ◽  
Cantilever Construction

Deflection control is the crucial procedure in construction control of cantilever prestressed concrete continuous girder bridge. This paper summarizes the advantages of Grey theory’s poor information processing and abilities of Neural Network’s self-learning and adaption, and the combinational algorithm of grey Neural Network is applied to the prestressed concrete bridge cantilever construction control process. Firstly, GM (1, 1) model and BP artificial Neural Network algorithm to predict the elevation of construction process are introduced respectively. In addition, the elevation prediction model of rigid-framed-continuous girder bridge is established. By practicing in the construction control project of LongHua Bridge, the method is testified to be feasible. The results indicate that, the combinational algorithm of Gray Neural Network to predict the construction elevation has higher reliability and accuracy which can be an effective tool of construction control for the same type bridges.

Analysis of collapse resistance of offshore rigid frame - Continuous girder bridge based on time-varying fragility

2021 ◽  
Vol 75 ◽  
pp. 102844
Author(s):  
Yan Liang ◽  
Jia Lei Yan ◽  
Wei Xin Qian ◽  
Zhan Qi Cheng ◽  
Huai Chen
Keyword(s):  
Time Varying ◽  
Rigid Frame ◽  
Collapse Resistance ◽  
Continuous Girder Bridge ◽  
Girder Bridge

scholarly journals Spectrum analysis of strong-motion earthquakes*

1953 ◽  
Vol 43 (2) ◽  
pp. 97-119
Author(s):  
G. W. Housner ◽  
R. R. Martel ◽  
J. L. Alford
Keyword(s):  
Dynamic Response ◽  
Ground Motion ◽  
Spectrum Analysis ◽  
Structural Response ◽  
Strong Motion ◽  
Quantitative Measure ◽  
Analog Computer ◽  
Earthquake Ground Motion ◽  
Earthquake Intensity ◽  
Electric Analog

Abstract The problem of the dynamic response of a structure to earthquake ground motion has been formulated in a manner which permits separation of the characteristics of particular structures from the characteristics of the earthquake. The expression involving the characteristics of the earthquake is defined as the “spectrum” of the earthquake and it is shown that the spectrum is a plot of the maximum response of a simple oscillator versus the period of the oscillator. Eighty-eight such spectra were computed by means of an electric analog computer and are presented in this paper. It is found that damping is a very important parameter in the over-all problem; relatively small amounts of damping reduce the structural response sharply. Further research on damping in buildings is recommended, and it is also proposed that the spectrum be used as a quantitative measure of earthquake intensity.

Influence of Closure Sequences on the Rigid Frame-Continuous Girder Bridge Closure

2013 ◽  
Vol 361-363 ◽  
pp. 1422-1428 ◽  
Author(s):  
Zhan Yong Yao ◽  
Xiao Meng Zhang ◽  
Shuai Li ◽  
Lian Fu Li ◽  
Xiang Hong Pan ◽  
...  
Keyword(s):  
Horizontal Displacement ◽  
Vertical Displacement ◽  
Rigid Frame ◽  
Continuous Girder Bridge ◽  
Girder Bridge

Closure sequences of rigid frame-continuous girder bridge are analyzed by calculation to compare girder deflection change, pier horizontal displacement maximum, girder and pier stress value. The results show that the first side span-second side span-mid span closure sequence causes the largest girder vertical displacement and others cause almost the same vertical displacement; side piers pier top horizontal displacement is larger than middle piers whatever the closure sequence is, closure sequences could not change the stress of the girder and pier. The first side span-mid span-second side span closure sequence should be preferred.

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