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.

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.

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.

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.

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.

scholarly journals Vibration analysis of a bucket wheel excavator boom using rayleigh’s damping model

2019 ◽  
Vol 2 (1) ◽  
pp. 233-241
Author(s):  
Florin Dumitru Popescu ◽  
Sorin Mihai Radu ◽  
Krzysztof Kotwica ◽  
Andrei Andraș ◽  
Ildiko Kertesz Brînaș ◽  
...  
Keyword(s):  
Time History ◽  
Time Response ◽  
Open Pit ◽  
Response Analysis ◽  
Damping Matrix ◽  
Stiffness Matrices ◽  
Excavation Process ◽  
History Analysis ◽  
Time Response Analysis ◽  
Dynamic Time

Abstract For the ERc 1400-30/7 type bucket wheel excavator (BWE) used in various Romanian open pit mines, a virtual model of the boom was constructed in SolidWorks. On this model, the variable in time forces acting during the excavation process were simulated, and the time history analysis (time response) was performed. This dynamic time response analysis was performed for excavation of homogenous material only, considering the damping as being of Rayleigh’s type, where the damping matrix is a linear combination of the mass and stiffness matrices. Based on the conducted analysis, the displacements of the boom during excavation were observed.

Analysis on Energy-Consumption and Earthquake-Mitigation for a High-Rise Building Set Metal Yield Dampers

2011 ◽  
Vol 90-93 ◽  
pp. 1517-1521
Author(s):  
Gui Xuan Wang ◽  
Yu Wang ◽  
Jie Zhao
Keyword(s):  
Time History ◽  
Residential Building ◽  
Response Analysis ◽  
Elastic Plastic ◽  
High Rise ◽  
History Analysis ◽  
Building Set ◽  
Metal Yield ◽  
Dynamic Time ◽  
Resistance Performance

Based on the mechanical properties of metal yield damper, high-rise residential building is implemented elastic-plastic response analysis for structure by using the nonlinear dynamic time-history analysis method under the effect of M8-class strong earthquake ,and judge performance level of structure and component. According to the elastic-plastic analysis results, put forward the improvement proposal for design to make the structure have the better resistance performance against the earthquake.

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.

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.

Response Law and Influencing Factors of the Soil under Action of Pile Driving Vibration Based on Midas/GTS

2013 ◽  
Vol 353-356 ◽  
pp. 979-983
Author(s):  
Dong Zhang ◽  
Jing Bo Su ◽  
Hui De Zhao ◽  
Hai Yan Wang
Keyword(s):  
Damping Ratio ◽  
Large Diameter ◽  
Time History ◽  
Pile Driving ◽  
Analysis Model ◽  
Vibration Load ◽  
History Analysis ◽  
Study Results ◽  
Propagation Law ◽  
Dynamic Time

Due to the upgrade and reconstruct of a high-piled wharf, the piling construction may cause the damage of the large diameter underground pipe of a power plant nearby. For this problem, a dynamic time-history analysis model was established using MIDAS/GTS program. Based on the analysis of the pile driving vibration and its propagation law, some parameters, such as the modulus of the soil, the Poissons ratio of soil, the action time of vibration load and the damping ratio of the soil that may have an effect on the response law of the soil, were studied. The study results not only serve as an important inference to the construction of this case, but also accumulate experience and data for other similar engineering practices.

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.

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