Structure Design of Car Overpass in the Urban Rail Construction

2014 ◽  
Vol 1006-1007 ◽  
pp. 38-41
Author(s):  
Lei Chen ◽  
Hong Sheng Qiu
Keyword(s):  
Three Dimensional ◽  
Element Model ◽  
Structure Design ◽  
Cable Stayed Bridge ◽  
Steel Truss Bridge ◽  
Steel Truss ◽  
Dimensional Finite Element ◽  
Girder Bridge ◽  
Three Dimensional Finite Element ◽  
Truss Bridge

The car overpass can play a significant role in easing traffic pressure. So for maximum easing traffic pressure, two types of car overpass are put forward: steel trussed girder-bridge and steel trussed cable-stayed bridge. Then establish a three-dimensional finite element model of the steel truss bridge and cable-stayed bridge by ANSYS. According to stress analysis and comparison of the steel truss and steel truss cable-stayed, the cable-stayed structure can enhance structural rigidity and strength, and have little influence on traffic.

Seismic Response Analysis of Multi-Span Cable-Stayed Bridge

2008 ◽  
Vol 400-402 ◽  
pp. 737-742 ◽  
Author(s):  
Guo Jing He ◽  
Zhong Quan Zou ◽  
Yi Qing Ni ◽  
Jin Ming Ko
Keyword(s):  
Seismic Response ◽  
Three Dimensional ◽  
Element Model ◽  
Response Analysis ◽  
Local Modes ◽  
Cable Stayed Bridge ◽  
Characteristics Analysis ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Dynamic Characteristics Analysis

Based on the dynamic characteristics analysis results of a precise three-dimensional finite element model, the earthquake responses of the bridge are analyzed in this paper. The influences of cable local modes and stabilizing cables on the seismic response are investigated by using different mode combinations and different models. It is found that the influence of cable local modes is negligible on the side towers while significant and not negligible on the main tower; the influence of the stabilizing cables is significant and not negligible on side towers, while minor and negligible on the main tower. As for the deck displacements, the influence of cable local modes is minor and negligible, while that of longitudinal stabilizing cables is significant and not negligible.

Three-Dimensional Finite Element Modeling and Front Crash Process Analysis of Car Bodywork

2010 ◽  
Vol 44-47 ◽  
pp. 920-923
Author(s):  
Li Xin Guo ◽  
Jie Gong ◽  
Jin Li Li
Keyword(s):  
Finite Element ◽  
Traffic Accidents ◽  
Process Analysis ◽  
Three Dimensional ◽  
Element Model ◽  
Economic Loss ◽  
Structure Design ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Front Crash

Traffic accidents cause to a large quantity of personnel casualty and economic loss every year. The safety in vehicle crash has been one of important criterions in vehicle design. In this study a three-dimensional finite element model was established and the front crash process of car bodywork was analyzed. The simulation results show that the structure design of car bodywork is reasonable and of safety for the passengers. The investigation of this study not only validates the rationality of the car bodywork design but also provides a detailed numerical simulation model for further investigation as well as improvement and optimization of the car bodywork structure.

scholarly journals Investigation of Influence Factors of Wind-Induced Buffeting Response of a Six-Tower Cable-Stayed Bridge

2016 ◽  
Vol 2016 ◽  
pp. 1-16 ◽  
Author(s):  
Zhi-Qiang Zhang ◽  
You-Liang Ding ◽  
Fang-Fang Geng
Keyword(s):  
Bridge Deck ◽  
Three Dimensional ◽  
Influence Factors ◽  
Element Model ◽  
Buffeting Response ◽  
Cable Stayed Bridge ◽  
Longitudinal Stiffness ◽  
Dimensional Finite Element ◽  
The Difference ◽  
Three Dimensional Finite Element

This paper presents an investigation of the wind-induced buffeting responses of the Jiashao Bridge, the longest multispan cable-stayed bridge in the world. A three-dimensional finite element model for the Jiashao Bridge is established using the commercial software package ANSYS and a 3D fluctuating wind field is simulated for both bridge deck and towers. A time-domain procedure for analyzing buffeting responses of the bridge is implemented in ANSYS with the aeroelastic effect included. The characteristics of buffeting responses of the six-tower cable-stayed bridge are studied in some detail, focusing on the effects including the difference in the longitudinal stiffness between the side towers and central towers, partially longitudinal constraints between the bridge deck and part of bridge towers, self-excited aerodynamic forces, and the rigid hinge installed in the middle of the bridge deck. The analytical results can provide valuable references for wind-resistant design of multispan cable-stayed bridges in the future.

Finite Element Analysis of Nonuniformity of Tires with Imperfections5

2007 ◽  
Vol 35 (3) ◽  
pp. 226-238 ◽  
Author(s):  
K. M. Jeong ◽  
K. W. Kim ◽  
H. G. Beom ◽  
J. U. Park
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Radial Force ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Dimensional Finite Element ◽  
Force Variation ◽  
Three Dimensional Finite Element

Abstract The effects of variations in stiffness and geometry on the nonuniformity of tires are investigated by using the finite element analysis. In order to evaluate tire uniformity, a three-dimensional finite element model of the tire with imperfections is developed. This paper considers how imperfections, such as variations in stiffness or geometry and run-out, contribute to detrimental effects on tire nonuniformity. It is found that the radial force variation of a tire with imperfections depends strongly on the geometrical variations of the tire.

scholarly journals Internal Force on and Deformation of Steel Assembled Supporting Structure of Foundation Pit under Thermal Stress

2021 ◽  
Vol 11 (5) ◽  
pp. 2225
Author(s):  
Fu Wang ◽  
Guijun Shi ◽  
Wenbo Zhai ◽  
Bin Li ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Bending Moment ◽  
High Strength ◽  
Element Model ◽  
Internal Force ◽  
Foundation Pit ◽  
Dimensional Finite Element ◽  
Influence Of Temperature On ◽  
Scale Experiment ◽  
Three Dimensional Finite Element

The steel assembled support structure of a foundation pit can be assembled easily with high strength and recycling value. Steel’s performance is significantly affected by the surrounding temperature due to its temperature sensitivity. Here, a full-scale experiment was conducted to study the influence of temperature on the internal force and deformation of supporting structures, and a three-dimensional finite element model was established for comparative analysis. The test results showed that under the temperature effect, the deformation of the central retaining pile was composed of rigid rotation and flexural deformation, while the adjacent pile of central retaining pile only experienced flexural deformation. The stress on the retaining pile crown changed little, while more stress accumulated at the bottom. Compared with the crown beam and waist beam 2, the stress on waist beam 1 was significantly affected by the temperature and increased by about 0.70 MPa/°C. Meanwhile, the stress of the rigid panel was greatly affected by the temperature, increasing 78% and 82% when the temperature increased by 15 °C on rigid panel 1 and rigid panel 2, respectively. The comparative simulation results indicated that the bending moment and shear strength of pile 1 were markedly affected by the temperature, but pile 2 and pile 3 were basically stable. Lastly, as the temperature varied, waist beam 2 had the largest change in the deflection, followed by waist beam 1; the crown beam experienced the smallest change in the deflection.

Process Modeling in Laser Deposition of Multilayer SS410 Steel

2007 ◽  
Vol 129 (6) ◽  
pp. 1028-1034 ◽  
Author(s):  
Liang Wang ◽  
Sergio Felicelli
Keyword(s):  
Phase Transformation ◽  
Temperature Distribution ◽  
Three Dimensional ◽  
Element Model ◽  
Traverse Speed ◽  
Processing Parameters ◽  
Dimensional Finite Element ◽  
Net Shaping ◽  
Three Dimensional Finite Element ◽  
Continuous Cooling Transformation Diagram

A three-dimensional finite element model was developed to predict the temperature distribution and phase transformation in deposited stainless steel 410 (SS410) during the Laser Engineered Net Shaping (LENS™) rapid fabrication process. The development of the model was carried out using the SYSWELD software package. The model calculates the evolution of temperature in the part during the fabrication of a SS410 plate. The metallurgical transformations are taken into account using the temperature-dependent material properties and the continuous cooling transformation diagram. The ferritic and martensitic transformation as well as austenitization and tempering of martensite are considered. The influence of processing parameters such as laser power and traverse speed on the phase transformation and the consequent hardness are analyzed. The potential presence of porosity due to lack of fusion is also discussed. The results show that the temperature distribution, the microstructure, and hardness in the final part depend significantly on the processing parameters.

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