Dynamic Response Analysis of Asphalt Pavement on Steel Deck under Design Loads

2013 ◽  
Vol 457-458 ◽  
pp. 1558-1561
Author(s):  
Feng Gao ◽  
Dao Kai Wei ◽  
Xiao Ping Wang ◽  
Guo Zhi Tian
Keyword(s):  
Dynamic Response ◽  
Time History ◽  
Response Analysis ◽  
Steel Bridge ◽  
Analysis Method ◽  
History Analysis ◽  
Moving Vehicles ◽  
Design Loads ◽  
Pass Through ◽  
Steel Deck

It will stir up the vibration of asphalt deck surfacing when the Vehicles pass through the steel bridge deck. The research of the moving vehicles vibration characteristics of the deck surfacing has been one enthusiastic concern. By the time history analysis method of finite element, the paper studied the dynamic response of the deck surfacing in different speeds of vehicles, and then analyzed the effect of the deck surfacing by different speeds.

Dynamic Response Analysis for Intersection of Transverse Traffic Tubes and Main Tunnel in a Highly Seismic Region

2011 ◽  
Vol 255-260 ◽  
pp. 2510-2514
Author(s):  
Lin Jie Chen ◽  
Bo Liang ◽  
Zhi Yong Wang
Keyword(s):  
Dynamic Response ◽  
Weak Link ◽  
Interaction Model ◽  
Time History ◽  
Response Analysis ◽  
Seismic Action ◽  
Seismic Region ◽  
Elastic Boundary ◽  
History Analysis ◽  
Elastic Boundary Conditions

The intersection of the transverse traffic tube and main tunnel is the weak link in the tunnel, as its structural forms are changed greatly and stiffness is discontinuous, so it does not help resist the seismic action. Based on the soil-structure interaction model and the use of visco-elastic boundary conditions and of time history analysis method, this paper, in combination with the Menglian tunnel engineering on the Bao-Teng Highway in Yunnan, has made a research of seismic dynamic response in the aforesaid intersection by analyzing its seismic dynamic characteristics and stability upon acquiring its displacement, stress, acceleration of dynamic response and distribution characteristics, and then put forth some disposal measures by seismic reinforcement, which can serve as reference to seism-reducing design of the weak link in the tunnel as well as other similar projects in a highly seismic region.

Study on Piping Response Under Multiple Excitation Validation for Elastic-Plastic Analysis of Piping

2014 ◽  
Author(s):  
Satoru Kai ◽  
Tomoyoshi Watakabe ◽  
Naoaki Kaneko ◽  
Kunihiro Tochiki ◽  
Makoto Moriizumi ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Seismic Response ◽  
Nuclear Power ◽  
Time History ◽  
Large Earthquake ◽  
Response Analysis ◽  
Analysis Method ◽  
Elastic Plastic ◽  
History Analysis ◽  
Plastic Analysis

Piping in a nuclear power plant is usually laid across several floors of a single building or adjacent buildings, and is supported at many points. As the piping is excited by a large earthquake through multiple supporting points, seismic response analysis by multiple excitations within the range of plastic deformation of piping material is necessary to obtain the precise seismic response of the piping. The verification of the dynamic analysis method of piping under an elastic domain, which is excited by multiple seismic inputs, was performed in our study last year and the correspondence of a piping response between an analysis and an experiment have been confirmed [17][18]. However, few experiments under plastic deformation conditions have been performed to verify the validity of multiple excitation analysis under a plastic deformation range. To obtain better understanding of the behavior of piping under a large seismic input, it is important to investigate the seismic response by multiple excitations and to verify the validity of the analytical method by multiple excitation experiments. This paper reports the validation results of the seismic elastic-plastic time history analysis of piping compared with the results of the shaking test of a 3-dimensional piping model under a plastic deformation range using triple uni-axial shake table. Three directional strains from the analysis and the experiments were compared in order to validate the analysis method. As a result, it is confirmed that the elastic-plastic analysis by time history excitation shows good agreement with the test results.

Study on the Effect of Cable Restrainers Stiffness on the Seismic Performance of Curved Viaducts Combined use of Steel Stoppers

2019 ◽  
Vol 13 (02) ◽  
pp. 1950006 ◽  
Author(s):  
Qin Tian ◽  
Toshiro Hayashikawa ◽  
Gu-Quan Song ◽  
Chun Zhang
Keyword(s):  
Energy Consumption ◽  
Seismic Performance ◽  
Time History ◽  
Shear Stiffness ◽  
Response Analysis ◽  
Analysis Method ◽  
History Analysis ◽  
Combined Use ◽  
Average Acceleration ◽  
Acceleration Method

This paper presents analysis to evaluate the efficiency of cable restrainers (CRs) stiffness on the seismic performance of curved viaducts combined use of steel stoppers at spatial multipoint. Based on the modified Hertz-damp model, considering the energy consumption the pounding phenomena at steel stoppers was exactly simulated. Considering the elasto-plastic constitutive model and shear stiffness, CRs were also modeled. The time history analysis method is used in this analysis, considering the geometrical and material non-linearities. The uniaxial yield criteria and kinematic strain hardening criteria are adopted. The constant average acceleration method is used for the dynamic response analysis. The results show that CRs combined with steel stoppers could mitigate the pounding forces at steel stoppers, displacements of the superstructures and the curvatures at pier bases by reducing the vibration difference between superstructures. The application of CRs with high stiffness can mitigate viaduct damage in earthquakes.

Dynamic Response Analysis of Lining Structure with Primary Defects for Tunnel under Moving Train Loading

2012 ◽  
Vol 525-526 ◽  
pp. 573-576 ◽  
Author(s):  
Yu Ping Cui ◽  
Wei Ze Sun ◽  
Jun Dong ◽  
Fei Dong
Keyword(s):  
Dynamic Response ◽  
Time History ◽  
Response Analysis ◽  
Subway Tunnel ◽  
History Analysis ◽  
Lining Structure ◽  
Measured Information ◽  
Dynamic Time ◽  
Moving Train ◽  
Train Loading

Considering the background of vibration engineering of lining structure of subway tunnel with primary defects under moving train loading, and according to the measured information of a dynamic loading spectrum of subway in Beijing, dynamic response of the lining structure with differently primary defects caused by neighboring tunnel construction has been investigated for different cases including one-way and two-way trains in this paper. The results show that the curves of dynamic time history analysis are similar with each other for displacement and stress under different cases with differently primary defects. The peak value of displacement and stress under the case of two-way train is much larger than that under the case of one-way train, and the structure primarily depends on tensile strength of concrete in safety. Under the case of one-way train with primary defects would there be no defect by vibration loads.

Research on the Dynamic Response of Dam under Rare Earthquake through Dynamic Time-History Analysis Method

2012 ◽  
Vol 594-597 ◽  
pp. 1640-1644
Author(s):  
Yun Xiang He ◽  
Yue Qiang ◽  
Li Li
Keyword(s):  
Dynamic Response ◽  
Time History ◽  
Time History Analysis ◽  
Analysis Method ◽  
Security Issue ◽  
Seismic Engineering ◽  
Weak Part ◽  
History Analysis ◽  
Dynamic Time ◽  
Rare Earthquake

With vigorous development of hydroelectric source in west China, the anti-seismic security issue of dam engineering attracted particular attention. This paper presented the principle of dynamic time-history analysis method and established the model with the assistance of finite element method and combined with practical engineering for further analysis on the dynamic response of displacement and stress of dam’s dynamic time-history analysis to the time history. According to the result, it is feasible and necessary to apply the dynamic time-history analysis method to study the anti-seismic performance of the dam. Furthermore, it pointed out the weak part of the dam in anti-seismic function as well as the area concentrated with critical stress, providing reference for future anti-seismic engineering and shock resistance.

Wind-Induced Response Analysis of Double Layer Cylindrical Lattice Shells

2011 ◽  
Vol 94-96 ◽  
pp. 896-901
Author(s):  
Min Li ◽  
Yong Yao ◽  
Jion Yang
Keyword(s):  
Double Layer ◽  
Time History ◽  
High Order Mode ◽  
Induced Response ◽  
Response Analysis ◽  
Analysis Method ◽  
Whole Process ◽  
Methods Of Calculation ◽  
History Analysis ◽  
Combination Of Methods

Analysis of wind-induced response of double-layer cylindrical reticulated shell by different methods of calculation . The results showed that the wind-induced response of the structure was increased and too safety by using existing load code calculation. Calculation of wind-induced response of double-layer cylindrical shell by using random vibration method, can only be considered first step mode, while the effect of high order mode could be ignored. The whole process of wind-induced response of the structure can be obtained by using combination of methods of harmony superposition and time-history analysis method, which can provide guidance for project design.

Dynamic Response Analysis of Composition Foundation with CFG Piles

2011 ◽  
Vol 368-373 ◽  
pp. 201-205 ◽  
Author(s):  
Zhong Liu ◽  
Jun Gao Zhu ◽  
Zong Liang Zhang ◽  
Guo Jin Zhu ◽  
Ying Tao Sun
Keyword(s):  
Dynamic Response ◽  
Time History ◽  
Composite Foundation ◽  
Response Analysis ◽  
Positive Contribution ◽  
Analysis Method ◽  
Foundation Soil ◽  
Earthquake Loads ◽  
Time History Response ◽  
Dynamic Time

The dynamic time-history response analysis method was employed to analyze the dynamic response of composition foundation with CFG piles. The deformation and stress distribution of composite foundation of CFG piles with different length and amount of piles under seismic wave was investigated. The results reveal that the bearing and asti-deformation capacity could be improved effectively for composite foundation under earthquake loads by increasing the length and number of pile. The vertical stress of foundation soil decreases gradually with the increase of the length and number of pile. The practice shows that CFG piles provide a positive contribution to the aseismic effect of foundation soils mass. The present research can provide some references to similar projects.

Analysis of 3D Seismic Dynamics of Jacket Platform

2014 ◽  
Vol 556-562 ◽  
pp. 5914-5917
Author(s):  
Xiao Dan Long ◽  
Peng Zhang ◽  
Li Wei Cui ◽  
Wei Wei
Keyword(s):  
Dynamic Response ◽  
Analytical Method ◽  
Simulation Analysis ◽  
Time History ◽  
3D Seismic ◽  
Analysis Method ◽  
Transient Dynamic Analysis ◽  
Jacket Platform ◽  
History Analysis ◽  
Seismic Simulation

Modeling the jacket platform by ANSYS, Study on the analytical method of the dynamic response of structure under the action of 3D seismic, get the atlas of dynamic response by transient dynamic analysis module and time-history analysis method of ansys. The results show that seismic simulation analysis of the whole structure is effective for aseismic design of jacket platform.

Dynamic Response Analysis of Butt Joint of HTS-A Steel Considering Welding Residual Stresses

2013 ◽  
Vol 423-426 ◽  
pp. 944-950
Author(s):  
Wei Shen ◽  
Ren Jun Yan ◽  
Lin Xu ◽  
Kai Qin ◽  
Xin Yu Zhang ◽  
...  
Keyword(s):  
Residual Stress ◽  
Dynamic Response ◽  
Hot Spot ◽  
Time History ◽  
High Strength ◽  
Simulation Method ◽  
Butt Joint ◽  
Welding Residual Stress ◽  
Response Analysis ◽  
Hull Structure

This paper uses both numerical simulation method and experimental research method to study on welding residual stress of high-strength steel of the cone-cylinder hull. Welding is often accompanied by a larger welding residual stress, which directly affects the safety and service life of the hull structure. In order to obtain the distribution of the welding residual stress, the welding procedure was developed by its parameter language by using FE analysis software in this paper. Then the welding residual stress of hot spot region was measured through X-ray nondestructive testing method, and compared it with simulation results. Finally, considering the residual stress as the initial stress, this paper analyzed dynamic response process of the welding structure under combined actions of the welding residual stress and multiaxial loads, which could more accurately determine the stress of welding structure and the location of fatigue risk point. According to the amplitude of damage parameters and strain time-history curve, we can estimate the fatigue life of structure by selecting the corresponding damage models.

scholarly journals Application of the Newmark Analysis Method in Stability Evaluation of Submarine Slope

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Hongxian Chu ◽  
Yongcai Feng ◽  
Huijie Shi ◽  
Liancheng Hao ◽  
Yiqi Gao ◽  
...  
Keyword(s):  
Peak Ground Acceleration ◽  
Time History ◽  
Stability Evaluation ◽  
Analysis Method ◽  
Tangshan Earthquake ◽  
Ground Acceleration ◽  
Engineering Construction ◽  
Submarine Slope ◽  
Offshore Engineering ◽  
History Analysis

The Newmark seismic time-history analysis method can take into account the effects of natural seismic peak ground acceleration (PGA), duration, and seismic frequency; seismic wave can be input into the method for simulation. This study calculates the dynamic response of the typical seabed slope of Caofeidian in the event of a similar Tangshan earthquake, and the displacement value can be used to quantitatively reflect the influence of the earthquake on the slope of the site. The allowable displacement value of the top of buildings or submarine slope can be used as a marker of security and stability analysis, which can further provide important reference for similar slope stability evaluation and offshore engineering construction.

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