A Study on the 3D Fine Model of a Large-Scale and Complicated Steel Truss Bridge

2011 ◽  
Vol 99-100 ◽  
pp. 383-387 ◽  
Author(s):  
Qun Wei ◽  
Hua Jiang ◽  
Sheng Ji Li
Keyword(s):  
Large Scale ◽  
Visual Analysis ◽  
Three Dimensional ◽  
Decision Makers ◽  
Data Conversion ◽  
Truss Bridges ◽  
Steel Truss Bridge ◽  
Steel Truss ◽  
Truss Bridge ◽  
Analysis Platform

The design and construction of the stiffening steel truss bridges is a complex and large-scale professional program. The abstract of the plans and the weaknesses of the view angles to the design sketch will also become limitations to the owners and the decision makers. Based on the project of River Baling Bridge of large stiffening steel truss girders, this study creates a three-dimensional fine model for it via CAD, pre-assembles each parts of the bridge, and checks sections and dockings one to one correspondingly. Data conversion of this model directly generates virtual visualized model. This visualized fine model of River Baling Bridge provides decision makers with a visual analysis platform, which also offers technical guarantee and support for sensible decision makings.

3D Fine Modeling Method in Large and Complex Steel Truss Bridge

2014 ◽  
Vol 501-504 ◽  
pp. 1408-1412
Author(s):  
Yi Fan Jia ◽  
Yun Dong Peng ◽  
Hua Jiang
Keyword(s):  
Large Scale ◽  
Visual Analysis ◽  
Three Dimensional ◽  
Modeling Method ◽  
Decision Makers ◽  
Data Conversion ◽  
Steel Truss Bridge ◽  
Steel Truss ◽  
Truss Bridge ◽  
Analysis Platform

The design and construction of the stiffening steel truss bridge is a complex and large-scale professional program. The abstract of the plans and the weaknesses of the view angles to the design sketch will also become limitations to the owners and the decision makers. Based on the project of Baling River Bridge of large stiffening steel truss girders, this study creates a three-dimensional fine model for it via CAD, pre-assembles each parts of the bridge, and checks sections and dockings one to one correspondingly. Data conversion of this model directly generates virtual visualized model. This visualized fine model of Baling River Bridge provides decision makers with a visual analysis platform, which also offers technical guarantee and support for sensible decision makings.

Modeling and Dynamic Characteristics Analysis of the Qiantangjiang Rail-Cum-Road Bridge

2014 ◽  
Vol 501-504 ◽  
pp. 1187-1193 ◽  
Author(s):  
Hui Wang ◽  
He Xia ◽  
Jia Wang Zhan
Keyword(s):  
Dynamic Characteristics ◽  
Mode Shapes ◽  
Plate Element ◽  
Truss Bridges ◽  
Beam Elements ◽  
Steel Truss Bridge ◽  
Steel Truss ◽  
Characteristics Analysis ◽  
Truss Bridge ◽  
Steel Truss Bridges

The dynamic characteristics of the Qiantangjiang rail-cum-road steel truss bridge is to analyzed by the Beam elements Midas model, beam-Plate element Midas model and plate element Ansys model, and the calculated results are compared with the field experiment data. The natural frequencies and mode shapes simulated with the plate element Ansys model are much closer to the experimental ones, indicating it can more accurately simulate the dynamic characteristics of steel truss structure. The results can provide a reference for modeling the steel truss bridges, and as the foundation of further static and dynamic analyses.

scholarly journals Three-dimensional fatigue crack propagation analysis of welded steel beam based on global-local numerical model

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Liang Zong ◽  
Gang Shi
Keyword(s):  
Fatigue Crack ◽  
Numerical Model ◽  
Crack Propagation ◽  
Three Dimensional ◽  
Local Model ◽  
Fatigue Assessment ◽  
Steel Truss Bridge ◽  
Propagation Analysis ◽  
Steel Truss ◽  
Truss Bridge

AbstractThe existing fatigue assessment approaches were mainly conducted on the component level. The interaction of local component damage and the global response cannot be well addressed. In this study, three-dimensional (3D) fatigue crack propagation analysis approach based on global-local numerical model was implemented, and examined to be accurate and effective through a series of systematic experimental data obtained by Fisher. Afterwards, the approach was introduced into a typical steel truss bridge for realizing more refined fatigue assessment from the global structural level. The fatigue performance of the longitudinal steel welded beam in the steel truss bridge was investigated based on global-local model and local model respectively. It was found that there is no difference in terms of the fatigue crack growth mechanism between the simulation between global-local model and local model due to that the stress level of the whole structure is relatively low. At last, the effect of heavy haul train operation on the fatigue performance of the steel truss bridge was analyzed. It was observed that the residual life of the longitudinal steel welded beam would have an obvious reduction when the axle load was increasing. The research work in this study presents a technical solution for the fatigue assessment of the global structure and can provide beneficial reference for relevant practical engineering projects.

scholarly journals Fatigue life assessment of large scale T-jointed steel truss bridge components

2017 ◽  
Vol 133 ◽  
pp. 499-509 ◽  
Author(s):  
Shunyao Cai ◽  
Weizhen Chen ◽  
Mohammad M. Kashani ◽  
Paul J. Vardanega ◽  
Colin A. Taylor
Keyword(s):  
Fatigue Life ◽  
Large Scale ◽  
Life Assessment ◽  
Steel Truss Bridge ◽  
Fatigue Life Assessment ◽  
Steel Truss ◽  
Truss Bridge

Existing Railway Steel Truss Bridge Static Experimental Analysis Based on Full-Bridge-Model

2013 ◽  
Vol 405-408 ◽  
pp. 1500-1503 ◽  
Author(s):  
Zhi Jie Sun ◽  
Yong Qian Liu
Keyword(s):  
Field Test ◽  
Element Model ◽  
Test Method ◽  
Evaluation Standard ◽  
Truss Bridges ◽  
Steel Truss Bridge ◽  
Bridge Model ◽  
Steel Truss ◽  
Static Performance ◽  
Truss Bridge

Combine the specific bridge, an analytical on the bridges static performance studied through the finite element model analysis and field test method. Summary and analyze the displacement and stress variation law of the main truss, longitudinal beams and beams which the bolt and weld superstructure steel truss bridges are effected by static loads, and compared field test results with theory value. Application practice proves that the evaluation standard and inspection of steel truss bridge is appropriate.

scholarly journals MODAL ANALYSIS FOR REVISION OF A FEM MODEL OF A STEEL TRUSS BEAM

2017 ◽  
Vol 13 ◽  
pp. 148
Author(s):  
Michal Venglar ◽  
Milan Sokol ◽  
Monika Marfoldi
Keyword(s):  
Damage Detection ◽  
Modal Analysis ◽  
Three Dimensional ◽  
Mode Shapes ◽  
Local Damage ◽  
Fem Model ◽  
Steel Truss Bridge ◽  
Steel Truss ◽  
The Difference ◽  
Truss Bridge

The paper deals with a preparation of a complex FEM model for a local damage detection. The initial verified and validated three-dimensional FEM model of a steel truss bridge in laboratory is revised step-by-step to achieve the accurate model according to the experimental model. The emphasis is on modelling of the joints with 4 rivets and modelling of correct boundary conditions, as well as mass parameters and cross-section dimensions.A modal analysis of the structure is performed in FEM software. Many experimental measurements were made to correctly revise the FEM model. The calculated natural frequencies are compared with the measured ones. In addition, mode-shapes from the calculation are validated with the measured mode-shapes. The difference between the prepared FEM model and the measured specimen is small enough after a few steps of tuning. The verified, validated and revised numerical model can be used in future for a local damage detection.

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.

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