Buffeting Internal Force Response Analysis for Stable Type Suspension Bridge

2013 ◽  
Vol 444-445 ◽  
pp. 32-36
Author(s):  
Meng Xi Geng ◽  
Ben Ning Qu ◽  
Jiao Long Peng ◽  
Xiao Chun Wang
Keyword(s):  
Finite Element ◽  
Suspension Bridge ◽  
Element Model ◽  
Internal Force ◽  
Response Analysis ◽  
Stable Type ◽  
Buffeting Response ◽  
Finite Element Software ◽  
Set Up ◽  
Fluctuating Wind

According to the definition of the Buffeting, it is caused by a fluctuating wind. Since fluctuating wind is wind speed changing with time in the atmosphere, it will cause the vibration of the structure. And pulsating wind reflects the atmospheric boundary layer wind disturbance and randomness. In the paper, Stable Type Suspension Bridge (STSB) is researched for buffeting problem. A finite element model of the bridge is set up using the finite element software. The buffeting response of the bridge is calculated and studied. The influence of the opposite tensional structures in the bridge on buffeting response of the bridge is assessed.

Numerical Simulation of Ultimate of Slings for Three-Tower and Four-Span Suspension Bridge under Tanker Fire

2013 ◽  
Vol 361-363 ◽  
pp. 1187-1193
Author(s):  
Mu Yu Liu ◽  
Wei Tian ◽  
Ying Wang ◽  
Wu Jing
Keyword(s):  
Finite Element ◽  
Failure Time ◽  
Three Dimensional ◽  
Fire Risk ◽  
Suspension Bridge ◽  
Element Model ◽  
Prevention Measures ◽  
Heating Curve ◽  
Finite Element Software ◽  
Three Dimensional Finite Element

Three-dimensional finite element model of Yingwuzhou Yangtze river bridge was established by using the finite element software ANSYS. Since the characteristics of bridge fire differed much from that of buildings, Heating curve HCincwas selected as heating curve caused by tanker fire. Heat loading was imposed on the middle of main span where the tanker fire had taken place of three-tower and four-span suspension bridge . The temperature field and stress, modulus of elasticity, strength of sling changing with time caused by tanker burning in midspan were systematically investigated to obtain the failure time of the sling. The calculation also compared the above results of HCinccurve with that of ISO834 curve. This research can provide some references to fire risk prevention measures of bridge during its service life.

Finite Element Analysis on Causes of Crack in Large Underground Garage

2014 ◽  
Vol 580-583 ◽  
pp. 1369-1376
Author(s):  
Bin Shu ◽  
Jian He Peng
Keyword(s):  
Finite Element ◽  
Poisson Ratio ◽  
Expansive Soil ◽  
Element Model ◽  
Underground Water ◽  
Element Analysis ◽  
Foundation Soil ◽  
Finite Element Software ◽  
Crack Problems ◽  
Set Up

The paper aims to solve the serious and regular crack problems in underground garage. ANSYS finite element software is applied to set up the overall finite element model on floor-foundation and foundation coupling beam-foundation soil in underground garage. Combined with engineering field detection, factors influencing underground garage floor like underground water level, soil expansion caused by water content change in expansive soil, soil poisson ratio, foundation settlement are taken into consideration to find out the causes of cracks. The study is expected to provide reference for similar cases in other projects.

RESEARCH ON WIND PERFORMANCE AND FIELD EXPERIMENT OF LARGE SCALE COMPLEX SURFACE SPACE TRUSS WITH STEEL PIPE

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Xiuli Wang ◽  
Yonghong Ran ◽  
Huvue Zhang ◽  
Yanpeng Zhu
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Canopy Structure ◽  
Field Tests ◽  
Complex Surface ◽  
Element Model ◽  
Internal Force ◽  
Wind Load ◽  
Large Span ◽  
Finite Element Software

The wind-induced performance response of large-span truss curved roofs is extremely complex and changes obviously under wind load. This paper has taken the large-span steel roof of Liu Zhaike highway toll station as an example to analyze by both numerical simulations and field tests of responses of the steel canopy under wind load. In this case, simulated analysis results using finite element software were calibrated and verified by the field test results. In addition, a new method of large structure field testing was proposed which obtained the internal force and displacement of the canopy structure. Moreover, this paper analyzed and determined the actual stress state of the rectangular pipe truss. Finally, the safety condition of the roof was evaluated based on the monitoring data and the simulation of the finite element model. And the analysis methods provides references for similar engineering field tests, as well as guidance for the operation and maintenance for this project.

Structural Design and Analysis of Aluminum Dome for Caofeidian Coal Storage

2016 ◽  
Vol 710 ◽  
pp. 396-401 ◽  
Author(s):  
Ze Chao Zhang ◽  
Hong Bo Liu ◽  
Xiao Dun Wang ◽  
Xiang Yu Yan ◽  
Jing Hai Yu ◽  
...  
Keyword(s):  
Finite Element ◽  
Aluminum Alloys ◽  
Three Dimensional ◽  
Single Layer ◽  
Element Model ◽  
Internal Force ◽  
Structural Deformation ◽  
Mode Analysis ◽  
Finite Element Software ◽  
The Stability

The upper part of Caofeidian coal storage was approximately hemispherical aluminum shell, covered with aluminum alloys plate. The capsule was made of aluminum alloys material, and its span was 125 meters. In the design, according to TEMCOR joint, we used the finite element software MIDAS to build the accurate geometry models and calculation models of aluminum alloys single layer latticed dome structures. By the combination of constant loads, live loads, snow load, wind load, temperature effect and other working conditions, we summarized the consumption of aluminum of the structures, and studied the structural internal force, structural deformation and structural stiffness. In addition, the X and Y two different direction seismic dynamic load was applied to the structure. The structural seismic performance under two kinds of modes were studied through the structure mode analysis of the vibration frequency. The vierendeel dome and single layer dome were controlled by the stability. ANSYS three-dimensional frame element model were set up, and the eigenvalue buckling analysis was carried out. By the geometrical nonlinear finite element method, combining with initial imperfections and material nonlinear, we found out the stability coefficient and the weak parts of the structure.

Dynamic Characteristics Simulation and Analysis for the Stable Type Suspension Bridge

2013 ◽  
Vol 444-445 ◽  
pp. 173-177
Author(s):  
Xiao Chun Wang ◽  
Ben Ning Qu ◽  
Jiao Long Peng ◽  
Meng Xi Geng
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Suspension Bridge ◽  
Element Model ◽  
Fish Bone ◽  
Suspension Bridges ◽  
Stable Type ◽  
Stable Suspension ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element

Under the background of a stable type suspension bridge (A suspension bridge with a inverse-tensional system), the effect of inverse-tensional system for suspension bridge is studied. Using finite element method, three-dimensional finite element model of stable type suspension bridge and a common suspension bridge is established by fish bone model consisting of beam elements respectively. The finite element characteristic equation of two bridges is solved with Block Lanczos method respectively. 20 order eigenpairs of two kind of suspension bridges are obtained. The inherent characteristics of the two type bridges are analyzed comparatively. The results showed that due to the effect of inverse-tensional structures, the overall stiffness of the stable suspension bridge is better than common suspension bridge obviously, which can effectively suppress the torsional vibration of the suspension bridge.

scholarly journals Preliminary numerical study on seismic response of ordinary long-span suspension bridges crossing active faults

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Hongyu Jia ◽  
Kang Jia ◽  
Caizhi Sun ◽  
Yanqiang Li ◽  
Chao Zhang ◽  
...  
Keyword(s):  
Finite Element ◽  
Fault Plane ◽  
Numerical Study ◽  
Ground Motions ◽  
Active Faults ◽  
Suspension Bridge ◽  
Element Model ◽  
Suspension Bridges ◽  
Finite Element Software ◽  
Long Span

AbstractThe objective of this paper is to expediently expose the seismic performance pertinent to demand and capacity of general long-span suspension bridges crossing active faults. Firstly three dimensional finite element model of the ordinary long-span suspension bridge is established based on the powerful and attractive finite element software ANSYS. Secondly a series of appropriate fault ground motions with different target final permanent displacements (Tectonic displacements or ground offset) in the direction perpendicular to the fault plane are assumed and applied to the employed long-span suspension bridge. And then the Newmark method is utilized to solve the equation of motion of the long-span suspension bridge structure subjected to fault ground motions in the elastic range. Finally some important conclusions are drawn that the final permanent displacements in the direction perpendicular to the fault plane has significant influence on the seismic responses and demands of general long-span suspension bridges crossing active faults. And the resultant conclusions deliver explicitly and directly specifications and guidelines for seismic design of ordinary long-span suspension bridges across fault-rupture zones.

Dynamic Response Analysis of the Reinforced Concrete Column under the Effect of Explosive Impact Load

2013 ◽  
Vol 681 ◽  
pp. 99-104 ◽  
Author(s):  
Yu Feng Chen ◽  
Guang Xiang Yi
Keyword(s):  
Finite Element ◽  
Large Scale ◽  
Simulation Analysis ◽  
Impact Load ◽  
Material Model ◽  
Element Model ◽  
Response Analysis ◽  
Reinforced Concrete Column ◽  
Rc Column ◽  
Finite Element Software

This paper does the data simulation analysis by using the large-scale finite element nonlinear ANSYS/LS-DYNA software. It chooses the MAT111(MAT-JOHNSON-HOLMQUIST -CONCRETE）concrete materials and the MAT3 (MAT-PLASTIC-KINEMATIC) reinforcement material model in ANSYS/LS-DYNA finite element software, builds the separating RC column finite element model, dynamically simulates the hurting process of RC column under the effect of explosive impact load, and mainly does research into the damage degree of RC column under different effects of explosive load of different peak pressures.

Seismic Response Analysis of Fuyang River Aqueduct

2014 ◽  
Vol 912-914 ◽  
pp. 1739-1742
Author(s):  
Cai Ying Chen ◽  
Ke Lun Wei ◽  
Gui Qiang Yang
Keyword(s):  
Finite Element ◽  
Boundary Conditions ◽  
Seismic Response ◽  
Elastic Recovery ◽  
Element Model ◽  
Response Analysis ◽  
Actual Situation ◽  
Seismic Response Analysis ◽  
Finite Element Software ◽  
Recovery Performance

In this paper, using finite element software ANSYSanalyzes seismic respons of Fuyang river aqueduct, respectively establishfinite element model under viscoelastic boundary conditions and elasticboundary conditions, compare and analyze seismic respons of aqueduct structureunder two kinds of boundary conditions. The results show that, compared withelastic boundary conditions, viscoelastic boundary conditions not only cansimulate elastic recovery performance of foundation, but also can realizeinfinite medium radiation damping, and viscoelastic boundary conditions is moreclose to the actual situation.

The Finite Element Analysis and Optimization for the Grinder Based on the Joint Surface

2013 ◽  
Vol 281 ◽  
pp. 165-169 ◽  
Author(s):  
Xiang Lei Zhang ◽  
Bin Yao ◽  
Wen Chang Zhao ◽  
Ou Yang Kun ◽  
Bo Shi Yao
Keyword(s):  
Finite Element ◽  
Natural Frequency ◽  
Element Model ◽  
Joint Surface ◽  
Weak Links ◽  
Response Analysis ◽  
Element Analysis ◽  
Static And Dynamic Analysis ◽  
Harmonic Response Analysis ◽  
Grinding Machine

Establish the finite element model for high precision grinding machine which takes joint surface into consideration and then carrys out the static and dynamic analysis of the grinder. After the static analysis, modal analysis and harmonic response analysis, the displacement deformation, stress, natural frequency and vibration mode could be found, which also helps find the weak links out. The improvement scheme which aims to increase the stiffness and precision of the whole machine has proposed to efficiently optimize the grinder. And the first natural frequency of the optimized grinder has increased by 68.19%.

Finite Element Model of Human Cochlea Considering of the Helicotrema Size

2013 ◽  
Vol 456 ◽  
pp. 576-581 ◽  
Author(s):  
Li Fu Xu ◽  
Na Ta ◽  
Zhu Shi Rao ◽  
Jia Bin Tian
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Basilar Membrane ◽  
Round Window ◽  
Element Model ◽  
Oval Window ◽  
Fe Model ◽  
Cochlear Duct ◽  
Human Cochlea ◽  
Set Up

A 2-D finite element model of human cochlea is established in this paper. This model includes the structure of oval window, round window, basilar membrane and cochlear duct which is filled with fluid. The basilar membrane responses are calculated with sound input on the oval window membrane. In order to study the effects of helicotrema on basilar membrane response, three different helicotrema dimensions are set up in the FE model. A two-way fluid-structure interaction numerical method is used to compute the responses in the cochlea. The influence of the helicotrema is acquired and the frequency selectivity of the basilar membrane motion along the cochlear duct is predicted. These results agree with the experiments and indicate much better results are obtained with appropriate helicotrema size.

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