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.

Dynamic Time History Analysis on Groundwater Hydraulic Tunnel under Three Dimensional Viscoelastic Boundary Conditions

2013 ◽  
Vol 302 ◽  
pp. 622-627
Author(s):  
Ji Yao ◽  
Liang Cao ◽  
Hui Min Wang ◽  
Li Jie Zhang ◽  
Liang Wu ◽  
...  
Keyword(s):  
Boundary Conditions ◽  
Seismic Response ◽  
Seismic Waves ◽  
Three Dimensional ◽  
Time History ◽  
Element Model ◽  
Rigid Boundary ◽  
Dimensional Finite Element ◽  
Dynamic Time ◽  
Three Dimensional Finite Element

The three dimensional finite element model of a groundwater hydraulic tunnel was eatablished in this paper by FEM software ANSYS, two seismic waves of bedrock wave and EI-centro wave in similar sites were entered, and dynamic time history method was applied to compare the seismic response of the two hydraulic tunnels which were under rigid boundary conditions and viscoelastic boundary conditions respectively. The results showed that, the dynamic response of the model under rigid boundary conditions was larger than the response under viscoelastic boundary, and the viscoelastic boundary was closer to the actual situation. Under viscoelastic boundary conditions, the smaller depth of the hydraulic tunnel, the more intensive of the seismic response.

Comprehensive Seismic Response Analysis for Estimating the Seismic Behavior of Buried Pipelines Enhanced by Three-Dimensional Dynamic Finite Element Analysis of Ground Motion and Soil Amplification

2016 ◽  
Vol 138 (5) ◽  
Author(s):  
Tsuyoshi Ichimura ◽  
Kohei Fujita ◽  
Pher Errol Quinay ◽  
Muneo Hori ◽  
Takashi Sakanoue ◽  
...  
Keyword(s):  
Finite Element ◽  
Ground Motion ◽  
Three Dimensional ◽  
Element Model ◽  
Response Analysis ◽  
Soil Amplification ◽  
Buried Pipelines ◽  
Seismic Input ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

We demonstrate a comprehensive earthquake response analysis method for improving the seismic input force estimation of buried pipelines by combining ground motion and soil amplification analyses. Using this method, the seismic input force of an actual pipeline was estimated and its seismic performance was checked for a largest assumed seismic fault scenario. Three-dimensional inhomogeneity of ground and surface topography is known to greatly affect the results of ground motion and soil amplification analyses. To consider these effects, a linear wave propagation analysis using a 10 × 109 degree-of-freedom three-dimensional finite element model was conducted for the ground motion analysis, and a nonlinear wave propagation analysis using an 80 × 106 degree-of-freedom three-dimensional finite element model was conducted for the soil amplification analysis. The application example showed that three-dimensional inhomogeneity of ground and surface topology caused complex seismic input forces to buried pipelines, and demonstrated the effectiveness of the comprehensive seismic analysis method proposed in this study.

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.

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.

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