Application Analysis of Finite Element Method in the Calculation of Foundation Pit Excavation

This paper introduces the finite element method theory of foundation pit excavation, on the basis of summarizing the past experience, combined with the mechanical property of engineered soil, by using a variety of contact relation provided by the finite element software, select the appropriate unit to simulate the foundation pit excavation model scientific and reasonable. It has a very important guiding significance in practical engineering.

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Finite-element analysis of axi-symmetric rotors

Journal of Strain Analysis ◽

10.1243/03093247v043163 ◽

1969 ◽

Vol 4 (3) ◽

pp. 163-168

Author(s):

H Stordahl ◽

H Christensen

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Three Dimensional ◽

Two Dimensional ◽

The Finite Element Method ◽

Element Analysis ◽

Engineering Problems ◽

Symmetric Rotor ◽

Practical Engineering ◽

Element Method

The finite-element method (1) (2)∗ is increasingly used in the stress analysis of mechanical-engineering problems. It is the purpose of this paper to described how the finite-element method can be used as an effective tool in the design of rotors. Up to the present time this method has mainly been used in the analysis of two-dimensional problems. However, a special class of three-dimensional problems, namely axi-symmetric rotors, can be treated as a nearly two-dimensional problem. This paper summarizes the development of the finite-element method as applied to the analysis of the axi-symmetric rotor. A computer programme is then briefly described, and the application of the method to the solution of three examples taken from practical engineering experience are presented.

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Analysis Beam-Column Cellular By Finite Element Method

10.29007/s1rd ◽

2022 ◽

Author(s):

Minh Duc Nguyen ◽

Thai Hien Nguyen

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Structural Elements ◽

The Finite Element Method ◽

Web Openings ◽

Telephone Networks ◽

The Past ◽

Post Buckling ◽

The Subject ◽

Element Method

Nowadays in the construction of modem buildings, it is necessary to accommodate pipes and ducts necessary services, such as air conditioning, water supply, sewerage, electricity, computer networks, and telephone networks. Cellular members – steel I‐ shaped structural elements with circular web openings at regular intervals – have been used as beams for more than 35 years now. Although in the past already a large deal of research was performed into the subject of the behavior of cellular beams, almost no attention has been paid to the application of cellular members as columns. The column will be analyzed using the finite element method to calculate the critical load and compared with the Eurocode3 standard, web-post buckling, and frame using cellular member by FEM.

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The Contribution of the Infill Walls to the Lateral Strength of Concrete Frames

The Open Construction and Building Technology Journal ◽

10.2174/1874836801913010114 ◽

2019 ◽

Vol 13 (1) ◽

pp. 114-122

Author(s):

Petros Christou ◽

Christos Venizelou

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Lateral Stiffness ◽

The Finite Element Method ◽

Infill Wall ◽

Element Analysis ◽

Infill Walls ◽

Finite Element Software ◽

Lateral Strength ◽

Element Method

Background: Recent research studies conclude that the contribution of the infill walls to the overall lateral strength of frames is significant. The current state of the art includes two main approaches for the idealization of the behavior of the infill walls and their implementation in software. Micro modelling includes the use of the finite element method whereas the macro modelling, includes the use of one-dimensional compressive diagonal strut elements to replace the infill wall and provide the equivalent lateral stiffness. Objective: The aim of this study was to compare various methods for the simulation of the infill walls with the finite element method and propose an alternative approach which makes use of the rigid end offset which is a feature available in most of the finite element software. Methods: A reinforced concrete frame model with an infill wall was created. The model was modified to form combinations of infill wall thicknesses and values of Young’s modulus. The models were analyzed using the finite element method. The results were utilized to develop equations for the calculation of the length of rigid end offsets for the beams and columns of the frame. The rigid end offsets were then used in the analysis to numerically stiffen the frame and simulate an effective lateral strength contribution from the infill wall. Results: The results of the implementation of the rigid end offsets to simulate the contribution of the infill walls to the lateral stiffness of the frame were compared to the results of the results from the finite element analysis. Specifically, the results for the walls normally found in construction (less or equal to 3m in height and with thickness less or equal to 25cm) showed a very good agreement while the remaining results were very close. Conclusion: This work proposes equations for calculation of the length for the rigid end offsets which can be used in the analysis of frames with infill walls. The results show that the utilization of this feature from the structural analysis software in the analysis of frames, results in adequate stiffening of the overall frame, thus, providing an equivalent stiffness which accounts for the presence of the infill walls.

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Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽

10.1039/c9nr06508c ◽

2019 ◽

Vol 11 (43) ◽

pp. 20868-20875 ◽

Cited By ~ 1

Author(s):

Junxiong Guo ◽

Yu Liu ◽

Yuan Lin ◽

Yu Tian ◽

Jinxing Zhang ◽

...

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Interfacial Effect ◽

Infrared Photodetector ◽

The Finite Element Method ◽

Ferroelectric Domains ◽

Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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