Multi-scale numerical analysis on dynamic response and local damage in long-span bridges

2007 ◽  
Vol 29 (7) ◽  
pp. 1507-1524 ◽  
Author(s):  
Z.X. Li ◽  
T.Q. Zhou ◽  
T.H.T. Chan ◽  
Y. Yu
Keyword(s):  
Numerical Analysis ◽  
Dynamic Response ◽  
Local Damage ◽  
Long Span Bridges ◽  
Multi Scale ◽  
Long Span

Aeroelastic forces and dynamic response of long-span bridges

2004 ◽  
Vol 60 (6) ◽  
pp. 1011-1048 ◽  
Author(s):  
Massimiliano Lazzari ◽  
Renato V. Vitaliani ◽  
Anna V. Saetta
Keyword(s):  
Dynamic Response ◽  
Long Span Bridges ◽  
Long Span

Vehicle-Induced Dynamic Response of Expansion Joints in Long Span Bridges

2014 ◽  
Vol 584-586 ◽  
pp. 2117-2120
Author(s):  
Zhen Sun ◽  
Yu Feng Zhang
Keyword(s):  
Dynamic Response ◽  
Newmark Method ◽  
Expansion Joint ◽  
Expansion Joints ◽  
Long Span Bridges ◽  
Finite Element Software ◽  
Long Span ◽  
Vehicle Impact ◽  
Vehicle Loading ◽  
Analysis Scheme

Due to increasing traffic on long span bridges, behavior of expansion joints is believed to be largely influenced by pounding impact from passing vehicles. In order to precisely understand behavior of expansion joint under vehicle impact loading, a new analysis scheme is proposed which incorporates interaction between vehicle and expansion joint. Mathematical model of vehicle is established and solved with Newmark method. Expansion joint is modeled with refined solid element in Finite element software ABAQUS. The analysis indicates that vehicle loading can induce large dynamic response of expansion joint in long span bridges.

scholarly journals A Quick Assessment and Optimization Method for a Flutter Aerodynamic Measure of a Typical Flat Box Girder

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Feng Wang ◽  
Chuan Xiong ◽  
Zijian Wang ◽  
Congmin Guo ◽  
Hua Bai ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Wind Tunnel ◽  
Energy Input ◽  
Test Procedure ◽  
Optimization Method ◽  
Box Girder ◽  
Wind Tunnel Tests ◽  
Long Span Bridges ◽  
Long Span ◽  
Quick Assessment

Flutter is one of the most serious wind-induced vibration phenomena for long-span bridges and may cause the collapse of a bridge (e.g., the Old Tacoma Bridge, 1940). The selection and optimization of flutter aerodynamic measures are difficult in wind tunnel tests. It usually takes a long time and consumes more experimental materials. This paper presents a quick assessment and design optimization method for the flutter stability of a typical flat box girder of the long-span bridges. Numerical analysis could provide a reference for wind tunnel tests and improve the efficiency of the test process. Based on the modal energy exchange in the flutter microvibration process, the global energy input and local energy input are analyzed to investigate the vibration suppression mechanism of a flat steel box girder with an upper central stabilizer. Based on the comparison between the experimental and numerical data, a quick assessment method for the optimization work is proposed. It is practical to predict the effects of flutter suppression measures by numerical analysis. Thus, a wind tunnel test procedure for flutter aerodynamic measures is proposed which could save time and experimental materials.

scholarly journals Dynamic response of long-span bridges subjected to nonuniform excitation: a state-of-the-art review

2019 ◽  
Vol 258 ◽  
pp. 05017
Author(s):  
Seplika Yadi ◽  
Bambang Suhendro ◽  
Henricus Priyosulistyo ◽  
Akhmad Aminullah
Keyword(s):  
Dynamic Response ◽  
State Of The Art ◽  
Ground Motions ◽  
Experimental Studies ◽  
Suspension Bridges ◽  
Long Span Bridges ◽  
Long Span ◽  
Numerical Studies ◽  
Multiple Support ◽  
Support Excitation

In recent years, considerable attention has been paid to the research of dynamic response of long-span bridges with particular emphasis on seismic behavior. Cable-stayed and suspension bridges are the most popular types. Since long-span bridges have multi-supports and extreme lengths, due to the spatial variation effects, the ground motions at different supports might be non-uniform. A state-of-the-art update review of the response of long-span bridges subjected to non-uniform excitation is presented. The review mainly focuses on the theoretical aspects of non-uniform excitation, numerical studies, and experimental studies to verify some of the theoretical findings. In this paper, a review of the use of shake-table in experimental studies of long-span bridges is also presented. The non-uniform cases considered include a time delay with the same support excitations, multiple support excitations, and the combination of the first and the later. The results are discussed and summarized in comparison to the cases of uniform support excitation.

scholarly journals Analysis of the dynamic response of long span bridges with GNSS under typhoon loading

2021 ◽  
Vol 4 (3) ◽  
pp. Manuscript
Author(s):  
Hongbo Wang ◽  
Xiaolin Meng ◽  
Chaohe Chen
Keyword(s):  
Dynamic Response ◽  
Real Time ◽  
Deformation Monitoring ◽  
Bridge Management ◽  
Time Data ◽  
Engineering Structures ◽  
Long Span Bridges ◽  
Long Span ◽  
Long Span Bridge ◽  
Cross Correlation Analysis

Nowadays, real-time bridge deformation monitoring has attracted more attention due to the development of bridge management system and land transportation safety. Huge civil engineering structures, such as long-span bridge, is susceptible to dynamic deflection caused by various loadings. Hence, precise dynamic response measurement becomes necessary to make structure more reliable and integrated. Currently, Global Navigation Satellite System (GNSS) positioning technology has been commonly used in this field to detect the dynamic displacement of long-span bridges. According to this, real-time data were collected from the Forth Road Bridge to observe the dynamic response of lang span bridges under extreme wind load conditions and this report has also verified the data processing technique of the real-time bridge deformation monitoring system. Compared with other monitoring methods, the method used in this report which combines GNSS and anemometer together has features of high frequency with low lag. Moreover, it also shows the superiority of post-processing and synchronization, background noises could be reduced by embedded software. Finally, according to the cross-correlation analysis, it was found that wind speed and bridge displacement in y-axis have the highest correlation. Also, the reliability of combining method to monitor the dynamic response of long-span bridge and noise reducing method proposed in this report has also been verified.

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