Dynamic Time-History Deformation Response Analysis of Long-Span Beam Bridge Subjected to Flowing Ice

2010 ◽  
Vol 163-167 ◽  
pp. 2830-2834
Author(s):  
Zhi Ping Bai ◽  
Xie Dong Zhang ◽  
Cheng Lin Han
Keyword(s):  
Yellow River ◽  
Time History ◽  
Response Analysis ◽  
Soil Function ◽  
Action Mode ◽  
Deformation Response ◽  
Long Span ◽  
Long Span Bridge ◽  
Dynamic Time ◽  
Beam Bridge

Based on the pile-soil function and damper boundary condition influence by Finite Element Method, taking Bao-Shu yellow river extra long-span bridge as the project object, the deformation effect of the bridge subjected to flowing and melting ice in spring was analyzed considering dynamical action mode. The results revealed that the deformation from this kind of action is tittly small and the bridge structure is reliable and stable. Then the calculation and analysis have been put into design and construction stage.

Static and Dynamic Response Contrast Simulation of Long-Span Beam Bridge Subjected to Flowing Ice

2012 ◽  
Vol 594-597 ◽  
pp. 1573-1576
Author(s):  
Zhi Ping Bai ◽  
Xie Dong Zhang ◽  
Cheng Lin Han
Keyword(s):  
Finite Element Method ◽  
Yellow River ◽  
Bridge Structure ◽  
Deformation Effect ◽  
Soil Function ◽  
Action Mode ◽  
Long Span ◽  
Long Span Bridge ◽  
Static Action ◽  
Beam Bridge

According to pile-soil function and damper boundary condition influence by Finite Element Method, taking Bao-Shu yellow river extra long-span bridge as the project object, the deformation effect of the bridge subjected to flowing and melting ice in spring was analyzed considering static and dynamical action mode. The results revealed that the deformation from this kind of action is tittly small and the bridge structure is reliable and stable. Also the deformation effect of the pier from dynamic ice action is larger than static action. While for two or more piers, the results are reverse.Then the calculation and analysis have been put into design and construction stage.

Settlement Analysis of Soft Ground Replacement under Earthquake

2012 ◽  
Vol 166-169 ◽  
pp. 2379-2382 ◽  
Author(s):  
Zhong Liu ◽  
Shu Hong An ◽  
Rong Hong Yuan ◽  
Fei Li
Keyword(s):  
Time History ◽  
Vertical Displacement ◽  
Response Analysis ◽  
Soft Ground ◽  
Positive Contribution ◽  
Foundation Soil ◽  
Time History Response ◽  
Dynamic Time ◽  
Settlement Analysis ◽  
Different Thickness

The dynamic time-history response analysis method was employed to analyze the dynamic response of soft ground replacement with sand-gravel cushion. The deformation distribution of soft ground replacement with different thickness sand-gravel cushion was investigated under seismic wave. The results reveal that the bearing and asti-deformation capacity can be improved effectively for replacement sand-gravel cushion under earthquake loads by increasing the thick of cushion. The vertical displacement of foundation soil decreases gradually with the increase of the thick of cushion. The practice shows that replacement sand-gravel cushion provides a positive contribution to the aseismic effect of foundation soils mass. The present research can provide some references to similar projects.

Seismic Performance Analysis of a Multi-Span Continuous Girder Bridge under Multi-Excitation

2013 ◽  
Vol 540 ◽  
pp. 141-152
Author(s):  
Hang Sun ◽  
De Jun Wang ◽  
Yong Li
Keyword(s):  
Seismic Response ◽  
Time History ◽  
Response Analysis ◽  
Continuous Beam ◽  
Space Correlation ◽  
Long Span Bridges ◽  
Girder Bridges ◽  
Long Span ◽  
Continuous Girder Bridge ◽  
Simple Support

Although the seismic response analysis under the multi-excitation was widely focused on the long-span flexible bridges, it is still necessary to pay more attention to this point of continuous girder bridges since the dynamic behavior of this type of bridges are different with either long-span bridges or simple support bridges. Based on the nonlinear dynamic time history analysis, a four-span continuous beam FEM was built, and the effect of excitation types and structure size on seismic response was studied. And results indicate that the structural performance of continuous girder bridges is sensitive with the space correlation of different location of seismic excitation. So its necessary to consider the space effect of excitation while carrying out a seismic design of continuous beam.

Seven Mega Floor MSCSS Modal Analysis

2013 ◽  
Vol 353-356 ◽  
pp. 2210-2215
Author(s):  
Jun Jun Wang ◽  
Lu Lu Yi
Keyword(s):  
Modal Analysis ◽  
Response Spectrum ◽  
Time History ◽  
Response Analysis ◽  
Superposition Method ◽  
Response Spectrum Analysis ◽  
Mode Superposition Method ◽  
History Analysis ◽  
Basic Performance ◽  
Dynamic Time

Modal analysis is also known as dynamic analysis for mode-superposition method. In the seismic response analysis of linear structural systems, it is one of the most commonly used and the most effective ways. Through the modal analysis of building structure, we can get some basic performance parameters of the structure. These parameters can help us make qualitative judgments for the respond of a structure first, and can help us judge whether they meet demands for conceptual design. Modal analysis is also the basis of other dynamic response analysis, including dynamic time history analysis and response spectrum analysis.

Seismic Response Analysis of Long Span Cable-Stayed Bridge under Non-Uniform Excitation

2012 ◽  
Vol 246-247 ◽  
pp. 131-135
Author(s):  
Bao Fu Wang ◽  
Zhong Ren Feng ◽  
Xiong Jiang Wang ◽  
Bai Ben Chen
Keyword(s):  
Dynamic Analysis ◽  
Ground Motion ◽  
Ground Motions ◽  
Time History ◽  
Large Mass ◽  
Response Analysis ◽  
Cable Stayed Bridge ◽  
Long Span ◽  
History Analysis ◽  
Large Mass Method

In this paper, non-uniform dynamic analysis of a cable-stayed bridge is carried out using the large mass method. The Ed Yangtze River highway bridge, constructed in Hubei province, is chosen as a numerical example. In the non-uniform dynamic analysis, various wave velocities are used for the travelling ground motion. Displacements and internal forces solutions obtained for the spatially varying ground motions are compared with those of the uniform excitation. It is observed that the velocity of the ground motion greatly influences the response of the bridge and the variability of the ground motions should be included in the time-history analysis of cable-stayed bridges.

Random Seismic Response Analysis of Long-Span Bridge Structures

2012 ◽  
Vol 204-208 ◽  
pp. 2157-2161 ◽  
Author(s):  
Zhang Jun Liu ◽  
Yan Fu Xing ◽  
Yong Wan
Keyword(s):  
Seismic Response ◽  
Independent Random Variables ◽  
Response Analysis ◽  
Orthogonal Expansion ◽  
Bridge Structure ◽  
Seismic Response Analysis ◽  
Long Span ◽  
Long Span Bridge ◽  
Bridge Structures ◽  
Random Seismic Response

Based on the orthogonal expansion method of stochastic processes, seismic acceleration processes can be represented as a linear combination of deterministic functions modulated by a set of mutually independent random variables. In conjunction with the probability density evolution method, the random seismic response of bridge structures can be successfully researched. A long-span bridge structure is taken as an example. The probabilistic information of the response of a long-span bridge structure in different control under earthquake excitations is investigated. The investigation provides a new approach to the random seismic response analysis of long-span bridge structures.

Numerical Simulation of Ship-bridge Collision Based on LS-DYNA Technique

2011 ◽  
Vol 243-249 ◽  
pp. 6230-6236 ◽  
Author(s):  
Li Tian ◽  
Cong Zhu
Keyword(s):  
Time History ◽  
Continuous Beam ◽  
Deformation Response ◽  
Continuous Beam Bridge ◽  
History Of ◽  
Collision Force ◽  
Coupling Algorithm ◽  
Beam Bridge ◽  
Oil Tanker ◽  
Good Agreement

A collision between a 2600 DWT oil tanker and the substructure of one railway continuous beam bridge is simulated using ANSYS/LS-DYNA. In the simulation, the dynamic interaction between the soil and piles is consideredthrough contact coupling algorithm and nodes sharing algorithm. The time history of ship collision force, penetration and velocity of the ship for the two different algorithms are presented, and relations of them are given. In addition, energy dissipation in every parts, deformation response and stress distribution of the substructure are analyzed in detail. The results indicate that rules of ship-bridge collision given by the two algorithms are in good agreement. Finally, reliability of the simulation in this paper is demonstrated through the comparison with specifications.

Analysis of Linear Viscous Damper Parameters and Shock Absorption for Long-Span Cable-Stayed Bridge

2011 ◽  
Vol 243-249 ◽  
pp. 3858-3862
Author(s):  
Hong Yu Jia ◽  
Shi Xiong Zheng ◽  
Ming Qiang Xia ◽  
Lei Yang
Keyword(s):  
Vertical Direction ◽  
Time History ◽  
Longitudinal Direction ◽  
Relative Displacement ◽  
Sensitivity Study ◽  
Viscous Dampers ◽  
Long Span ◽  
Behavior Study ◽  
History Analysis ◽  
Dynamic Time

The seismic behavior study of Fengdu Bridge will be conducted on a parameter of damping coefficient C of linear viscous dampers through linear dynamic time-history analysis. Simultaneously, the results are compared with the seismic response without viscous dampers. The parameter sensitivity study indicates that setting damper in longitudinal direction of bridge can reduce the relative displacement of key positions and the response of the bridge, the beneficial effect of the isolation in the longitudinal direction, but important amplification occurs in the vertical direction for relatively high frequency components. Moreover, the reference of application of linear viscous dampers will be provided for similar projects.

Dynamic Response Analysis of Tailings Dam under Seismic Action

2015 ◽  
Vol 799-800 ◽  
pp. 746-750
Author(s):  
Ai Min Gong ◽  
Hai Yan Huang ◽  
Hui Ying Zhang
Keyword(s):  
Dynamic Stability ◽  
Time History ◽  
Reference Value ◽  
Element Model ◽  
Dynamic Responses ◽  
Response Analysis ◽  
Seismic Load ◽  
Seismic Action ◽  
Tailings Dam ◽  
Dynamic Time

A finite element model of tailiings dam was used to analyze the dynamic responses of the stress field, displacement and acceleration of the dam with the dynamic time-history response analysis method in this paper. The time-history curves of different responses were obtained. And an evaluation for dynamic stability of the tailings dam was also discussed. The analysis result shows that this case can provide a certain reference value for the dynamic calculation and the dynamic stability analysis of tailings dam under seismic load.

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