Bridge structure design and finite element analysis

2021 ◽  
Author(s):  
Xiaolin Zhang ◽  
Tianyi Guan ◽  
Lei Fan ◽  
Na Wang ◽  
Li Shang ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Structure Design ◽  
Bridge Structure ◽  
Element Analysis

scholarly journals Feasibility simulation of aseismic structure design for long-span bridges

Open Physics ◽  
2018 ◽  
Vol 16 (1) ◽  
pp. 1107-1117
Author(s):  
Li Lai
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Seismic Isolation ◽  
Structure Design ◽  
Bridge Structure ◽  
Element Analysis ◽  
Structural Dynamic ◽  
Dynamic Reliability ◽  
Long Span Bridges ◽  
Long Span

Abstract In the traditional finite element analysis method, when simulating the feasibility of aseismic structure design of long-span bridges, only finite element analysis is carried out on the bridge structure without considering the aseismic situation of the aseismic structure of the bridge under different schemes, which leads to one-sidedness of the simulation results. Therefore, a new simulation method for the feasibility study of seismic design of long-span bridges is proposed in this paper. 5 seismic isolation schemes for long-span bridge structures are designed. The lock-up devices and liquid viscous dampers are deployed in bridge structure. Numerical simulation of bridge structure is carried out by establishing calculation model and improved hierarchical Kerr spring model. The responses of long-span bridges under seismic loading for 5 seismic isolation schemes are analyzed. On this basis, the seismic performance of long-span bridges is tested by using the multi-point excitation motion equation, the response power spectrum and the structural dynamic reliability analysis based on the first transcendental failure criterion. Experimental results show that all the five seismic isolation schemes are feasible, and the seismic effect of the schemes 4 and 5 is the strongest. The maximum horizontal thrust of pier top is 6.27E+062, 0.50E+07 and 6.00E+06, 2.78E+07, respectively. The proposed method can be used to simulate the seismic response of long-span bridges.

scholarly journals Research on Bridge Structure Reliability Evaluation due to Vessels Collison Based on a Statistical Moment Method

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Tao Fu ◽  
Yang Liu ◽  
Zhixin Zhu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Moment Method ◽  
Structural Reliability ◽  
Statistical Moment ◽  
Bridge Structure ◽  
Element Analysis ◽  
Performance Function ◽  
Structural Resistance ◽  
Collision Force

Damage to bridge structures caused by vessel collision is a risk for bridges crossing water traffic routes. Therefore, safety around vessel collision of existing and planned bridges is one of the key technical problems that must be solved by engineering technicians and bridge managers. In the evaluation of the reliability of the bridge structure, the two aspects of vessel-bridge collision force and structural resistance need to be considered. As there are many influencing parameters, the performance function is difficult to express by explicit function. This paper combines the moment method theory of structural reliability with finite element analysis and proposes a statistical moment method based on finite element analysis for the calculation of vessel-bridge collision reliability, which solves the structural reliability problem with a nonlinear implicit performance function. According to the probability model based on current velocity, vessel velocity, and vessel collision tonnage, the estimate points in the standard normal space are converted into estimate points in the original state space through the Rosenblatt reverse transform. According to the estimate points in the original state space and the simplified dynamic load model of vessel-bridge collision, the sample time-history curve of random vessel-bridge collision force is generated, the dynamic response of the bridge structure and the structural resistance of the bridge are calculated by establishing a finite element model, and the failure probability and reliability index of the bridge structure is calculated according to the fourth-moment method. The statistical moment based on the finite element analysis is based on the finite element analysis and the moment method theory of structural reliability. The statistical moment of the limited performance function is calculated through a quite small amount of confirmatory finite element analysis, and the structural reliability index and failure probability are obtained. The method can be widely used in existing finite element analysis programs, greatly reducing the number of finite element analyses needed and improving the efficiency of structural reliability analysis.

Risk-Based Stability Assessment of a Gantry Crane

2014 ◽  
Author(s):  
Bin Xu ◽  
Zhongjian Yu ◽  
Yuqing Yang ◽  
Xiaoying Tang ◽  
Tao Zhang
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Analytical Method ◽  
Engineering Application ◽  
Structure Design ◽  
Gantry Crane ◽  
Stability Assessment ◽  
Element Analysis ◽  
Risk Elements ◽  
Assessment Approach

Stability of a gantry crane was a challenge in its structure design. A new risk-based stability assessment approach was proposed in this paper. Analytical method was introduced firstly, and then finite element method was adopted to evaluate the stability of square bar. In order to verify the finite element models, results of buckling analysis were compared with the results of analytical method. Secondly, this finite element analysis was applied in stability assessment of a gantry crane, and through parameterized analysis risk elements were identified. Finally, risk-based stability assessment was applied to this gantry crane, and neural network algorithm was adopted to evaluate the risk elements which were defined by finite element analysis. The evaluating results were well consistetent with statistical data, which indicated this risk-based stability assessment approach was reliable which showed a potential in engineering application.

Numerical Simulation of Stress and Deformation on Heat Transfer

2011 ◽  
Vol 422 ◽  
pp. 842-845
Author(s):  
Xue Ping Wang ◽  
Ying Zhang ◽  
Pan Li ◽  
Zhen Wei Zhang
Keyword(s):  
Heat Transfer ◽  
Numerical Simulation ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Heat Exchange ◽  
Structure Design ◽  
Stress And Strain ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Stress And Deformation

This paper primarily simulates the heat exchange part’s stress and strain situation under the load of temperature and gravity and their coupling impact aiming at obtaining the stress and deformation distribution. The authors took advantage of the method of the finite element analysis to study the stress and strain situation. Through the analysis, each part of the transfer’s stress and strain can be calculated. The conclusion of this paper provides the basis for the further enhancement of the machine life and optimization of the structure design.

Structural Finite Element Analysis on Side Wall Pouring Formwork Trolley for Subway Station

2013 ◽  
Vol 380-384 ◽  
pp. 95-100
Author(s):  
Yan Fang Ma ◽  
Zhen Tong He ◽  
Qin Zhao
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Light Condition ◽  
Side Wall ◽  
Element Model ◽  
Structure Design ◽  
Analysis Software ◽  
Element Analysis ◽  
Work Condition ◽  
The Stability

Structure finite element analysis software ANSYS is used to establish relatively complete finite element model for automatic side wall formwork trolley, analyze the stability of formwork trolley under light condition and work condition, and give a correct classification on working conditions of formwork trolley. Main factors influencing the stability of formwork trolley are found and improving measures are proposed to provide reference for optimal structure design and standardized design of formwork trolley.

Finite Element Analysis and Topology Optimization Design for Motional Board of Injection Molding Machine

2014 ◽  
Vol 607 ◽  
pp. 573-576
Author(s):  
En Guang Zhang ◽  
Li Wang ◽  
Wen Ju Shan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Topology Optimization ◽  
Injection Molding ◽  
Optimization Design ◽  
Structure Design ◽  
Molding Machine ◽  
Element Analysis ◽  
Injection Molding Machine ◽  
Load Carrying

The structure and the load-carrying capability of the front board of injection molding machine are more complex. The error of the approximation algorithm employed in engineering is larger so that the board may become invalid in the process of using, The finite element analysis can obtain the stress distribution in the parts so as to improve the accuracy of calculation and the quality of design; through The topology optimization analysis will take the initiative to find the optimal plan, which provides the theoretical basis for the improvement of the load-carrying capability and the structure design of board. This paper have conducted a parametric design, finite element analysis and the topology optimization design for a motional board of the injection molding machine using “Advanced simulation” of NX8.0, and get a quantitative conclusion of that the motional board volume is reduced and its stiffness is significantly enhanced.

scholarly journals An Analytic Verification on Fracture Behavior of Adhesion Exfoliation with Out-plane Shear Mode due to Tapered Angles of 6°and 8° at TDCB Made of Unidirectional Laminated CFRP

2019 ◽  
Vol 8 (2S6) ◽  
pp. 185-189
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Design Method ◽  
Structure Design ◽  
Light Weight ◽  
Analysis Method ◽  
Gas Emission ◽  
Element Analysis ◽  
Finite Element Analysis Method ◽  
Weight Structure

Because of environmental issues, the regulations on gas emission from fossil fuels become stricter. Some investigations are being carried out actively to change the fossil fuel power into electrical power. Researches on the reduction of weight in the transportation machine is also executed. Weight reduction is one of the methods of reducing the gas emission and increasing the range of electrically powered machines. The method of weight reduction includes the development of light weight material and light weight structure design method. FRP is the most representative light weight material. Among various FRP materials, (CFRP) has the highest specific strength. Light weight structure design method includes the method of designing the structure by converting the bonding method with bolts and rivets to adhesion method with the use of adhesives. In order to pursue the research on the adhesive structure design method, the research on adhesion exfoliation by using CZM needs to be carried out. There are the researches with various methods in accordance with the style of adhesion exfoliation load and material designs. In this study, the adhesion exfoliation on the tearing fracture of tapered double cantilever beam configuration was applied to the research. Research model was composed by applying the gradient angles of 6° and 8° to TDCB. The model with the gradient angle of 8° has less fracture due to adhesion than that of 8°. The basic data on structural design of adhesion structure were provided by comparatively analyzing the research models. This research was carried out by using finite element analysis method in this study. Finite element analysis method has the advantage of reducing the cost and time taken for experiments in researches. Therefore, the finite element analysis program, ANSYS, was used in this study.

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