scholarly journals Force Analysis of Supporting System during Form-Work Construction of Box Culvert without Tie Rod

2022 ◽  
Vol 2148 (1) ◽  
pp. 012040
Author(s):  
Guangming Zhai ◽  
Yuwei Wang ◽  
Liu Liu ◽  
Pan Guo
Keyword(s):  
Finite Element ◽  
Local Deformation ◽  
Element Analysis ◽  
Supporting System ◽  
Finite Element Software ◽  
Calculation Results ◽  
Box Culvert ◽  
Force Calculation ◽  
Force Characteristics

Abstract In the construction process of box culvert form-work without tie rod, the stress state of its supporting system is of great importance. Based on a construction project for the box culvert without tie rod form-work, this paper studied the force characteristics of diagonal braces during the concrete pouring of the box culvert. The force calculation theory of the support system was analyzed and the force was analyzed using the finite element software Midas Civil. The results showed that when the distance between the connection point of the diagonal brace and the foundation was 1 m, the diagonal brace cannot provide effective support for the template, and when the distance between the connection point of the diagonal brace and the template is 2 m, 3 m, and 4 m, the diagonal brace can provide effective support. It was recommended that the diagonal brace connection point is 3 m away from the template as the optimal diagonal brace layout position. It is recommended to strengthen the area of increased local deformation of diagonal braces to a certain extent according to the calculation results of this finite element analysis to improve the safety performance of the entire structure. The research results of this paper can provide reference for follow-up similar construction problems.

Finite Element Analysis of Anti-Reflective Crack for Geosynthetic in Asphalt Overlay of Airport Runway

2012 ◽  
Vol 503-504 ◽  
pp. 847-850
Author(s):  
Zhi Gang Luo ◽  
Yan Liu ◽  
Sui Yuan Wang ◽  
Bo Diao
Keyword(s):  
Finite Element ◽  
Surface Deformation ◽  
Element Model ◽  
General Purpose ◽  
Main Role ◽  
Element Analysis ◽  
Finite Element Software ◽  
Asphalt Overlay ◽  
Calculation Results ◽  
Airport Runway

To make clear the work mechanism of geosynthetic in asphalt overlay under the aircraft wheel loads, one 3D dimension finite element model was constructed on the basis of the general purpose finite element software ABAQUS. Numerical calculation results with different geosynthetic modulus are presented in this paper, and show that it is very limited for geosynthetic to reduce bottom stress and surface deformation of asphalt overlay, and asphalt overlay bottom is in compression state, thus, geosynthetic can not exert it’s film tension function, namely the main role of geosynthetic is not to bear loads together with asphalt overlay, but to improve stress state of asphalt overlay for preventing cracks appearance or delaying cracks expansion.

Finite Element Analysis of Steel Liner in the Gradual Change Segment of Downstream Dam Surface Penstock

2011 ◽  
Vol 219-220 ◽  
pp. 685-688
Author(s):  
Xin Li Bai ◽  
Qian Pan ◽  
Hai Li Su
Keyword(s):  
Finite Element ◽  
Ring Structure ◽  
External Pressure ◽  
Gradual Change ◽  
Target Structure ◽  
Element Analysis ◽  
Finite Element Software ◽  
Calculation Results ◽  
Steel Liner ◽  
Very High

Taking dam body and steel liner in the gradual change segment of inlet of a hydropower station as the research target, structure analysis is carried out by use of the large finite element software. Temperature variation load and external pressure load equivalent to internal vacuum 0.2MPa pressure are considered. Stress and distribution of the dam, steel liner and the stiffener rings are obtained. The calculation results show that, steel liner structure in the gradual change segment has sufficient rigidity; the stress state of steel liner structure is very complex and the stress concentration in stiffener rings is significant; the stress value in sharp-angled area of stiffener ring structure is also very high. Anchor reinforcement with radial constraints and transverse stiffeners are suggested to add to the steel liner, so as to improve the force bearing conditions of steel liner structure in the gradual change segment of inlet. The obtained results and conclusions can be referenced for the design of steel liner structure in the gradual change segment of inlet.

Design Analysis of Unbonded Prestressed Concrete Two-Way Slab

2012 ◽  
Vol 204-208 ◽  
pp. 853-856
Author(s):  
Jia Sheng Liu
Keyword(s):  
Finite Element ◽  
Prestressed Concrete ◽  
Material Selection ◽  
Concrete Slab ◽  
Internal Force ◽  
Element Analysis ◽  
Finite Element Software ◽  
Linear Load ◽  
Standard Value ◽  
Force Calculation

Through some engineering example, the finite element software SAP2000N is used to make a finite element analysis on the prestressed concrete slab, which is made of concrete with grade of C40, low relaxation PC strand wile with tensile strength standard value of 1860N/mm2and nonprestressed reinforcements with grade of HRB335. By doing this, the author systematically introduced the material selection, prestressing technique and linear, load values and internal force calculation, distribution of prestressed tendons and nonprestressed reinforcement, the design process of crack and deformation of cast-in-site prestressed concrete two-way slab.

The ABAQUS Standard Layer Assembly Modeling Approach of Building Structure

2014 ◽  
Vol 1065-1069 ◽  
pp. 1260-1266
Author(s):  
Dong Yue Wu ◽  
Shu Ting Liang ◽  
Zheng Xing Guo
Keyword(s):  
Finite Element ◽  
Difficult Problem ◽  
Building Structure ◽  
Element Analysis ◽  
Assembly Modeling ◽  
Finite Element Software ◽  
Modeling Approach ◽  
Calculation Results ◽  
Integral Structure ◽  
Layer Assembly

The mechanics analysis of integral building structure needs the accurate ABAQUS finite element analysis, but due to the ABAQUS function limits the building structure modeling is a great workload and how to model an integral structure more quickly and efficiently become a difficult problem. In order to reduce the workloads in the ABAQUS analysis, the new ABAQUS standard layer assembly modeling approach was proposed. Firstly, according to the data structure of the ABAQUS software’s INP file, the program computational algorithm was proposed. And by a Python self-written program, the example engineering structure model was completed using this standard layer assembly approach. The usage of this new ABAQUS modeling approach makes the modeling more easy and efficient. After that, by comparing the ABAQUS standard layer assembly model calculation results with the results calculated by another finite element software, it is clearly illustrated that the ABAQUS standard layer assembly modeling is more accurate and can be applied in the structure analysis.

Finite Element Analysis of Tianerya Trench-Buried Inverted Siphon

2013 ◽  
Vol 804 ◽  
pp. 320-324
Author(s):  
Xiang Zan Xie
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Finite Element Calculation ◽  
Construction Process ◽  
Element Calculation ◽  
Element Analysis ◽  
Operational Process ◽  
Inverted Siphon ◽  
Calculation Results ◽  
Calculation Software

This paper adopts universal finite element calculation software to carry out finite element analysis for Tianerya trench-buried inverted siphon. Researching variation law of the inverted siphons stress and displacement in construction process and operational process. The calculation results further shown design schemes rationality and safety. The analysis results provide a certain reference for design of trench-buried inverted siphon structure.

Finite Element Analysis of Main Stand of Ф140 Pipe Rolling Mill and Split Casting

2013 ◽  
Vol 690-693 ◽  
pp. 2327-2330
Author(s):  
Ming Bo Han ◽  
Li Fei Sun
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Rolling Mill ◽  
Analysis Model ◽  
Element Analysis ◽  
Pipe Rolling ◽  
Full Load ◽  
Finite Element Software ◽  
Theoretical Position ◽  
Technical Requirements

By using finite element software, the paper establishes the main stand analysis model of the Ф140 pipe rolling mill and provides the model analysis of main stand in cases of full load. Verify the design of main stand fully comply with the technical requirements .In this paper, it provides the theoretical position of split casting and welding method using electric slag welding.

Finite Element Analysis of Uniaxial Compression of Glazed Hollow Bead of Recycled Concrete Short Columns

2014 ◽  
Vol 898 ◽  
pp. 399-402
Author(s):  
Heng Sun ◽  
Bai Shou Li
Keyword(s):  
Finite Element ◽  
Uniaxial Compression ◽  
Recycled Concrete ◽  
Intensity Level ◽  
Concrete Wall ◽  
Element Analysis ◽  
Ordinary Concrete ◽  
Ansys Simulation ◽  
Finite Element Software ◽  
Short Columns

For traditional ordinary concrete wall column prone to thermal bridges, posted outside the insulation board short life than the life of the building，in the glazed hollow bead of recycled concrete foundation with good thermal conductivity test and compressive strength of the proposed ,use glazed hollow bead of recycled concrete exterior wall column instead of the traditional ordinary concrete wall column ,and using the finite element software ANSYS simulation analysis the uniaxial compression of glazed hollow bead of recycled concrete short columns and ordinary concrete short columns. Comparative analysis showed the same intensity level glazed hollow bead of recycled concrete ultimate compressive bearing capacity of an analog value the same as ordinary concrete short columns. To validate the ANSYS simulation of concrete short columns under uniaxial compression condition .

scholarly journals Simulation Analysis on Cymbal Transducer

2011 ◽  
Vol 2-3 ◽  
pp. 140-143
Author(s):  
Qing Feng Yang ◽  
Peng Wang ◽  
Yu Hong Wang ◽  
Kai Zhang
Keyword(s):  
Finite Element ◽  
Resonance Frequency ◽  
Piezoelectric Ceramic ◽  
Electromechanical Coupling ◽  
Free Field ◽  
Voltage Sensitivity ◽  
Element Analysis ◽  
Cavity Bottom ◽  
Finite Element Software ◽  
Cymbal Transducer

The resonance frequency of the cymbal transducer ranges from 2kHz to 40kHz and its effective electromechanical coupling factor is around 20%. Finite element analysis has been performed to ascertain how the transducer’s makeup affect the transducer’s performance parameters. Two-dimensional axisymmetric model of the cymbal transducer was founded by finite element software-ANSYS, the application of the element type was discussed and the FEM models were built up under the far field condition. Eight groups of cymbal transducers of resonance frequency around 3kHz with different structural dimensions were designed. It was better for choosing the cymbal transducer of the 8mm cavity coping diameter, 20.8mm cavity bottom diameter and 26.8mm piezoelectric ceramic wafer diameter than others for reducing distortion degree of the signal and improving communication turnover in the researched cymbal transducers. It was appropriate for choosing the cymbal transducer of the 8mm cavity coping diameter, 22.4mm cavity bottom diameter and 26.4mm piezoelectric ceramic wafer diameter in order to improve the free-field voltage sensitivity and transmission efficient.

BIDIMENSIONAL FINITE ELEMENT ANALYSIS OF SPUR GEAR: STUDY OF THE MESH STIFFNESS AND STRESS AT THE LEVEL OF THE TOOTH FOOT

2009 ◽  
Vol 33 (2) ◽  
pp. 175-187 ◽  
Author(s):  
Mohamed Nizar Bettaieb ◽  
Mohamed Maatar ◽  
Chafik Karra
Keyword(s):  
Finite Element ◽  
Stress State ◽  
Spur Gear ◽  
Fortran Program ◽  
Mesh Stiffness ◽  
Element Analysis ◽  
Gear Mesh ◽  
Finite Element Software ◽  
Time Calculation ◽  
Finite Element Meshing

The purpose of this work is to determine the spur gear mesh stiffness and the stress state at the level of the tooth foot. This mesh stiffness is derived from the calculation of the normal tooth displacements: local displacement where the load is applied, tooth bending displacement and body displacement [15]. The contribution of this work consists in, basing on previous works, developing optimal finite elements model in time calculation and results precision. This model permits the calculation of time varying mesh stiffness and the evaluation of stress state at the tooth foot. For these reasons a specific Fortran program was developed. It permit firstly, to obtain the gear geometric parameters (base radii, outside diameter,…) and to generate the data base of the finite element meshing of a tooth or a gear. This program is interfaced with the COSMOS/M finite element software to predict the stress and strain state and calculate the mesh stiffness of a gear system. It is noted that the mesh stiffness is periodic and its period is equal to the mesh period.

Calculating Mechanics Characteristics of Single-Walled Carbon Nanotube Materials by Finite Element Method

2017 ◽  
Vol 730 ◽  
pp. 548-553
Author(s):  
Jing Ge ◽  
Hao Jiang ◽  
Zhen Yu Sun ◽  
Guo Jun Yu ◽  
Bo Su ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Radial Direction ◽  
Element Model ◽  
Beam Element ◽  
Beam Position ◽  
Single Walled Carbon ◽  
Finite Element Software ◽  
Calculation Results ◽  
The Moment

In this paper, we establish the mechanical property analysis of Single-walled Carbon Nanotubes (SWCNTs) modified beam element model based on the molecular structural mechanics method. Then we study the mechanical properties of their radial direction characteristics using the finite element software Abaqus. The model simulated the different bending stiffness with rectangular section beam elements C-C chemical force field. When the graphene curled into arbitrary chirality of SWCNTs spatial structure, the adjacent beam position will change the moment of inertia of the section of the beam. Compared with the original beam element model and the calculation results, we found that the established model largely reduced the overestimate of the original model of mechanical properties on the radial direction of the SWCNTs. At the same time, compared with other methods available in the literature results and the experimental data, the results can be in good agreement.

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