Application of a simple biomechanical model of a pedestrian in the solution of the dynamic response of a light bridge structure

2015 ◽  
pp. 2919-2928 ◽  
Author(s):  
T Hanzlík ◽  
V Salajka ◽  
J Kala
Keyword(s):  
Dynamic Response ◽  
Biomechanical Model ◽  
Bridge Structure

scholarly journals Asymptotics of eigenfrequencies in the dynamic response of elongated multi-structures

2011 ◽  
Vol 468 (2138) ◽  
pp. 378-394 ◽  
Author(s):  
M. Brun ◽  
G. F. Giaccu ◽  
A. B. Movchan ◽  
N. V. Movchan
Keyword(s):  
Dynamic Response ◽  
Elastic System ◽  
Low Frequency ◽  
Design Tool ◽  
Asymptotic Estimates ◽  
Bridge Structure ◽  
Frequency Range ◽  
Floquet Waves ◽  
Asymptotic Optimization ◽  
Analytical Formulae

The paper addresses a mathematical model describing the dynamic response of an elongated bridge supported by elastic pillars. The elastic system is considered as a multi-structure involving subdomains of different limit dimensions connected via junction regions. Analytical formulae have been derived to estimate eigenfrequencies in the low frequency range. The analytical findings for Bloch–Floquet waves in an infinite periodic structure are compared with the finite element numerical computations for an actual bridge structure of finite length. The asymptotic estimates obtained here have also been used as a design tool in problems of asymptotic optimization.

Vibration Analysis of Bridge Structure under Moving Train Load and Earthquake Action

2014 ◽  
Vol 501-504 ◽  
pp. 1266-1269 ◽  
Author(s):  
Bei Bei Fan ◽  
Yuan Zhang ◽  
Dong Hua Ruan
Keyword(s):  
Dynamic Response ◽  
Time History ◽  
Dynamic Effect ◽  
Bridge Structure ◽  
Steel Truss Bridge ◽  
History Analysis ◽  
Steel Truss ◽  
Earthquake Action ◽  
Truss Bridge ◽  
Moving Train

In this paper, vibration of a steel truss bridge under moving train and earthquake action is analyzed. The following conclusions are drawn by modal analysis and time-history analysis. 1) Lateral dynamic response of this structure is more obvious under earthquake action and lateral dynamic effect of train running load; 2) seismic response in the directions different from train load is small, and dynamic response becomes larger obviously when they are considered together.

scholarly journals Knock-Off Effect of Steel Side Block as Displacement Restrainers on Dynamic Response of Isolated Bridge Structure

2011 ◽  
Vol 14 ◽  
pp. 2341-2349 ◽  
Author(s):  
K. Ishihara ◽  
M. Matsumura ◽  
M. Yoshida ◽  
M. Sakaida
Keyword(s):  
Dynamic Response ◽  
Bridge Structure ◽  
Isolated Bridge

Wavelet Analysis in Damage Detection for Bridge Structure

2009 ◽  
Vol 417-418 ◽  
pp. 813-816
Author(s):  
Wei Bing Hu ◽  
Wei Hu ◽  
Yu Zheng
Keyword(s):  
Energy Spectrum ◽  
Wavelet Analysis ◽  
Dynamic Response ◽  
Damage Detection ◽  
Structural Damage ◽  
Bridge Structure ◽  
Response Signal ◽  
Modal Parameter ◽  
Structural Dynamic ◽  
Signal Energy

The damage of structure leads to variation of structural modal parameter，so the wavelet transform for damage detection is introduced in this paper for considering the variation. First, structural dynamic response signal on the basis of the vibration-based structural damage diagnosis methods is calculated by structural analysis in the paper, then, each of sub-signals is calculated according to wavelet analysis, also, the sub-signal energy spectrum of dynamic response signal and energy spectrum variation are known. By observing the difference of the sub-signal and the variation of the sub-signal energy spectrum, we can get the variation of structural modal parameter and the sub-signal energy spectrum due to the performance degradation of the whole structure and local variations of damage level and location ,so that this method can be used in on-line damage detection for bridge structure.

Analysis on Analogue Simulation for Oscillatory Compaction Implementation in Bridge Deck Pavement

2014 ◽  
Vol 488-489 ◽  
pp. 433-436 ◽  
Author(s):  
Si Te Wu ◽  
Ping Ming Huang ◽  
Juan Wang
Keyword(s):  
Service Life ◽  
Dynamic Response ◽  
Simulation Model ◽  
Bridge Deck ◽  
Dynamic Responses ◽  
Bridge Structure ◽  
Analogue Simulation ◽  
Contrast Analysis ◽  
Pavement Construction ◽  
Bridge Deck Pavement

According to the compaction mechanism of oscillatory roller, a simulation model for oscillatory compaction implementation in bridge deck pavement was constructed via ANSYS. Contrast analysis on dynamic responses to bridge structure when vibratory roller or oscillatory roller is in operation shows that dynamic response of oscillatory roller is much smaller than that of vibratory roller under approximate compaction degrees. In this way, disturbance for the bridge structure can be reduced greatly, risk of bridge deck pavement construction can be decreased, and service life of the bridge can be increased effectively.

The Influence of Pile-Pier Reinforcement Ratio on the Development of Plastic Zone of Bridge Structure

2013 ◽  
Vol 838-841 ◽  
pp. 1058-1062
Author(s):  
Bo Song ◽  
Kai Wen Li ◽  
Min Zhong
Keyword(s):  
Plastic Zone ◽  
Dynamic Response ◽  
Seismic Wave ◽  
Pile Foundation ◽  
Seismic Waves ◽  
Plate Boundary ◽  
Reinforcement Ratio ◽  
Bridge Structure ◽  
Nonlinear Seismic Response ◽  
Different Types

In this paper, using elastic-plastic fiber unit model for a continuous beam bridge structure and foundation to analyses the nonlinear seismic response of pier and pile foundation considering pile-soil interaction and the different types of seismic wave on the pile foundation and the pier dynamic response, focusing on the development of plastic zone and dynamic response of structure under different pile-pier reinforcement ration conditions. The results show that, with the pile pier reinforcement ratio increases, the response plasticity of pile and pier show a different trend; so pile-pier reinforcement ration is an important factor of dynamic characteristics for the bridge pier supported by group piles system; the pier reinforcement ratio not only impact on development of the plastic zone of the pier, but also impact on the pile. In addition, different types of seismic waves on the structure are different, the long-period seismic waves maximum, followed by inland direct seismic waves, plate boundary seismic wave minimum.

scholarly journals Dynamic Response of Railway Bridges under Heavy-Haul Freight Trains

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Ye Xiao ◽  
Xiaoyong Luo ◽  
Jinhong Liu ◽  
Kun Wang
Keyword(s):  
Dynamic Response ◽  
Fe Model ◽  
Bridge Structure ◽  
Railway Bridge ◽  
Running Speed ◽  
Railway Bridges ◽  
Heavy Haul ◽  
Formation Number ◽  
Axle Loads ◽  
Heavy Haul Railway

In the freight railway bridge, the increase of the train running speed and train axle loads can enlarge dynamic response (DR) of the railway bridges, which leads to excessive vibration of bridges and endangers the structural safety. In this paper, a three-dimensional coupled finite element (FE) model of a heavy-haul freight train-track-bridge (HHFTTB) is established using multibody dynamics theory and FE method, and the DR for the coupled system of HHFTTB are solved by ABAQUS/Explicit dynamic analysis method. The field-measured data for a 32 m simply supported prestressed concrete beam of a heavy-haul railway in China are analyzed, and the validity of the FE model is verified. Finally, the effects of train formation number, train running speed, and train axle loads on DR of the heavy-haul railway bridge structures are studied. The results show that increasing the train formation number only has an influence on DR duration of the bridge structure, rather than the peak value of DR, when the train formation number exceeds a certain number; besides, the train axle loads and train running speed have significant influence on DR of the bridge structure. The results of this study can be used as reference for the design of heavy-haul railway bridges and the reinforcement transformation of existing railway bridges.

Dynamic Response on Earthquake Analysis of Bridge Structure Isolated by Lead-Core Rubber Bearing

2010 ◽  
Vol 163-167 ◽  
pp. 4251-4256
Author(s):  
Hai Xu Yang ◽  
Hai Biao Wang ◽  
Bao Kuan Li ◽  
Jian Gang Yao
Keyword(s):  
Dynamic Response ◽  
Dynamic Performance ◽  
Economic Benefits ◽  
Earthquake Resistance ◽  
Bridge Structure ◽  
Hysteretic Model ◽  
Analysis Model ◽  
Construction Design ◽  
Rubber Bearing ◽  
Rubber Bearings

The dynamic analysis of earthquake responses of one simple bridge structure supported by hinged and rolled bearing and another simple bridge structure isolated by lead-core rubber bearings was described in elastic-plastic range. The relative displacements and accelerations of the structures were calculated under different amplitude earthquake waves in order to observe the influence of lead-core rubber bearing on earthquake- resistance of bridges. The availability of the analysis model, hysteretic model and relevant parameters adopted as well as the computation program developed are verified. According to the analysis of dynamic response data, the lead-core rubber bearings with proper parameters are used to improve the dynamic performance of the structures, the seismic response of the bridge deck and pier would therefore be greatly reduced, the safety and seismic performance of the structure are globally raised, earthquake- resistance could be increased, and rather good economic benefits have been achieved as well. The analysis can provide accurately the reference basis for construction design.

Human pilot dynamic response in flight and simulator.

1958 ◽  
Author(s):  
Edward Seckel ◽  
Ian A. M. Hall ◽  
Duane T. McRuer ◽  
David H. Weir
Keyword(s):  
Dynamic Response
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