Seismic Performance Analysis of the Large Spherical Tank

2014 ◽  
Author(s):  
Zhirong Yang ◽  
Dayong Zhang ◽  
Longwei Guo ◽  
Baibing Yang ◽  
Guodong Wang
Keyword(s):  
Seismic Performance ◽  
Time History ◽  
Structure Design ◽  
Design Parameters ◽  
Response Analysis ◽  
Seismic Load ◽  
Special Equipment ◽  
Seismic Safety ◽  
Finite Element Software ◽  
Spherical Tank

The seismic safety problem of the spherical tank under seismic load has become one important subject in seismic research of special equipment. Based on the ANSYS finite element software, typical spherical tank mechanics model is established first of all, through precise time history response analysis under the seismic excitation to determine the significant location of the stress. Then, the seismic performance impact of the support structure design parameters is analyzed. Finally, the seismic performance of all kinds of spherical tank, such as the large, medium and small tank, is determined. This paper provides a reasonable basis for the anti-seismic safety security and design of the spherical tank.

scholarly journals Enhancement in the Seismic Performance of a Nuclear Piping System using Multiple Tuned Mass Dampers

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2077 ◽  
Author(s):  
Shinyoung Kwag ◽  
Jinsung Kwak ◽  
Hwanho Lee ◽  
Jinho Oh ◽  
Gyeong-Hoi Koo
Keyword(s):  
Optimal Design ◽  
Optimum Design ◽  
Seismic Performance ◽  
Response Analysis ◽  
Similar Degree ◽  
Seismic Load ◽  
Piping System ◽  
Tuned Mass Dampers ◽  
Seismic Safety ◽  
Design Values

In a nuclear power plant, it is essential to improve the seismic safety of the piping system for the coolant transfer to cool the high temperature caused by the nuclear reaction. Under this background, this study makes two major contributions. The first is that though tuned mass dampers (TMDs) were originally used only to reduce the vibration of piping itself, through this research, it was first proved that it had a positive effect on the improvement of the seismic performance of nuclear piping systems. Additionally, this study proposed a design approach that effectively obtains the optimal design values of TMDs associated with seismic performance. In order to effectively derive the TMD optimum design values, we not only utilized the existing TMD optimum design formula, but also additionally proposed a frequency response analysis-based TMD optimal design method. As a result, it was seen that primary responses of system were significantly reduced under the input seismic load due to the use of TMDs for the piping system. It was also confirmed that the use of the existing TMD formula brought about a similar degree of response reduction effect, while it was possible to get the improved effect when using the proposed method.

Seismic Response Analysis of Free Long-Span Submarine Flexible Pipelines under Earthquakes

2014 ◽  
Vol 580-583 ◽  
pp. 1704-1707
Author(s):  
Yu Lin Deng ◽  
Yu Bian ◽  
Fan Lei
Keyword(s):  
Seismic Response ◽  
Fluid Structure Interaction ◽  
Time History ◽  
Response Analysis ◽  
Seismic Safety ◽  
Peak Displacement ◽  
Fluid Structure ◽  
Structure Interaction ◽  
Finite Element Software ◽  
Long Span

Submarine pipelines are described as the lifeblood of offshore oil and it is crucial to ensure the seismic safety of the submarine pipelines. Based on the fluid-structure interaction numerical analysis method and by using finite element software ADINA, the analysis models of the free long-span submarine flexible pipelines under earthquakes were established. By employing dynamic time-history method, the influences of fluid-structure interaction on the seismic response of the submarine pipelines were researched. The results showed that the peak normal stress and the peak displacement of submarine pipelines’ mid-span considering the influences of the fluid-structure interaction are greater than those without considering the influences, and the influences of the fluid-structure interaction on the seismic response of the submarine pipelines will increase with the increase of the submarine pipelines‘ diameter.

The Passive Energy-Dissipation Study of Braced Steel Frame Structure

2010 ◽  
Vol 163-167 ◽  
pp. 318-322
Author(s):  
Wen Xia Luo ◽  
Jin Song Lei ◽  
Ying Hu
Keyword(s):  
Energy Dissipation ◽  
Seismic Performance ◽  
Time History ◽  
Steel Frame ◽  
Frame Structure ◽  
Seismic Load ◽  
Control Force ◽  
Finite Element Software ◽  
Passive Energy Dissipation ◽  
Steel Frame Structure

The seismic performance of braced steel frame was simulated by the finite element software ANSYS based on the passive energy-dissipation under the low-cycle repeated load and the time-history analysis under seismic load for the energy-dissipation braced steel frame structure, no-brace steel frame structure, and conventional braced frame structure. The energy dissipation and seismic performance of three kinds of frame were compared, the results show that the energy-dissipation braced structure can produce strong energy-dissipation control force to enhance energy dissipation capacity of the whole structure significantly, and weaken the seismic load of the main frame. It follows that the energy-dissipation braced steel frame can achieve the purpose of energy dissipation for structure, and has good seismic performance.

Comparative Study on Seismic Response Analysis Methods of Spherical Tanks

2020 ◽  
Author(s):  
Zhongming Ma ◽  
Guang Xiao ◽  
Minghui Zhang ◽  
Haijun Zhang ◽  
Ruixue Du
Keyword(s):  
Time History ◽  
Element Model ◽  
Response Analysis ◽  
Seismic Safety ◽  
Weakest Link ◽  
Mode Decomposition ◽  
Spherical Tank ◽  
History Analysis ◽  
Earthquake Load ◽  
Real Earthquake

Abstract Spherical tank is an important storage equipment in petrochemical industry. It is often used to store inflammable and explosive materials. Once it is damaged in the earthquake, it will lead to serious consequences. In this paper, the finite element model of spherical tank is established by ANSYS software. The bottom shear method, mode decomposition method and time history analysis method are used to calculate the strength of spherical tank. The weakest link of the structure under the real earthquake load is determined, which provides the basis for the seismic safety guarantee and structural design of spherical tank. The applicability of the three calculation methods is compared and discussed.

scholarly journals Support structure design for New Zealand Forest Products Ltd's No. 5 Recovery Boiler

1987 ◽  
Vol 20 (1) ◽  
pp. 2-6
Author(s):  
R. D. Sharpe
Keyword(s):  
New Zealand ◽  
Seismic Performance ◽  
Time History ◽  
Forest Products ◽  
Structure Design ◽  
Seismic Resistance ◽  
Simple Application ◽  
Major Earthquake ◽  
Lateral Forces ◽  
Industrial Boilers

Internationally, the seismic resistance of large industrial boilers appears to be addressed by the most simple application of relatively low equivalent static lateral forces which are resisted elastically. This paper describes measures taken to ensure a predictable
and controlled seismic performance of such a boiler
during a major earthquake. Inelastic time-history methods of analysis were used to confirm that the desired performance would be achieved. As a result the client was able to purchase a relatively standard boiler in the international marketplace and still achieve a level of seismic resistance consistent with the best NZ practices.

Seismic Response Analysis of Twin-Tower Building with Enlarged Base

2014 ◽  
Vol 912-914 ◽  
pp. 1534-1537
Author(s):  
Shao Bo Zhang ◽  
Ke Lun Wei ◽  
Bi Jian Xiao
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Boundary Conditions ◽  
Seismic Response ◽  
Time History ◽  
Response Analysis ◽  
Rigid Boundary ◽  
Finite Element Software ◽  
Elastic Boundary ◽  
Elastic Boundary Conditions

This paper adopts large finite element software ANSYS to establish finite element model of twin-tower building with enlarged base, uses dynamic time history analysis method for seismic response calculation, compare and analyze the calculation results of twin-tower building with enlarged base under elastic boundary conditions and rigid boundary conditions. The results showe that dynamic response for model under elastic boundary conditions is larger than dynamic response for model under rigid boundary conditions, and elastic boundary conditions is more close to the actual situation.

Structure Dynamic Response Analysis of Pipe String under the Action of Perforating Detonation Wave

2014 ◽  
Vol 986-987 ◽  
pp. 887-890 ◽  
Author(s):  
Xiang Sun ◽  
Zong Zhi Yang ◽  
Yun Gang Liu ◽  
Mai Quan Zhang ◽  
Yuan Fei Zhu
Keyword(s):  
Dynamic Response ◽  
Impact Load ◽  
Equivalent Stress ◽  
Time History ◽  
Response Analysis ◽  
Wave Impact ◽  
Dynamic Response Analysis ◽  
Finite Element Software ◽  
Structure Dynamic ◽  
Stress Changes

Impact load of perforation will result in strong vibration of downhole string, string operated such as bending fracture accidents. Considering the clearance between string and casing, using space beam and spring element to solve the nonlinear contact problems between oil jacket, established the numerical model of string structure dynamic response analysis in horizontal well. Extracting downhole perforation pressure wave monitoring data, using the finite element software ANSYS, analyzed the dynamic response of the tubing under perforation of detonation shock wave impact, got the displacement of the tubing、acceleration time history. The results show that, without packer, the maximum Mises equivalent stress in the end of the string, the deformation and stress changes in deflecting section of the tubing string are bigger than in vertical Wells.

Study on Cold-Formed Steel of Thin-Walled Housing for Dynamic Performance

2011 ◽  
Vol 250-253 ◽  
pp. 3305-3308
Author(s):  
Yong Yao ◽  
Yun Peng Chu ◽  
Li Wang ◽  
Rui Zhao
Keyword(s):  
Seismic Performance ◽  
Seismic Waves ◽  
Lateral Displacement ◽  
Dynamic Performance ◽  
Time History ◽  
Steel Structure ◽  
Seismic Intensity ◽  
Finite Element Software ◽  
Cold Formed Steel ◽  
Rare Earthquake

Cold-formed steel structure is suitable for post-earthquake reconstruction since its good seismic performance and construction speed. Analyzing the dynamic characteristic of a two story office building by using the finite element software ANSYS. And the results show that: (1) in the time history analysis based on three types of seismic waves the lateral displacement of the structure and rotation between layers to meet the relevant specifications when confront the rare earthquake (2) Under the seismic loads, earthquake response acceleration amplification factor is smaller which indicating better seismic performance and it can be used in areas with high seismic intensity.

Study on Seismic Safety Evaluation of RCC Gravity Dam Based on Strength

2014 ◽  
Vol 501-504 ◽  
pp. 1493-1497
Author(s):  
Shu He Wang ◽  
Ji Yuan ◽  
Rui Guo Ma ◽  
Ju Bing Zhang
Keyword(s):  
Finite Element ◽  
Response Spectrum ◽  
Three Dimensional ◽  
Safety Evaluation ◽  
Time History ◽  
Element Model ◽  
Gravity Dam ◽  
Seismic Safety ◽  
Finite Element Software ◽  
Three Dimensional Finite Element

According to No.3 dam section of Dahuaqiao gravity dam, a three-dimensional finite element model is built by finite element software ANSYS. Mechanics of materials method, response spectrum method and time history analysis method are employed to analyze the strength of the dam section. Results show that the stress of dam toe, dam heel and downstream fold slope are relatively high and stress concentration emerges in those positions. The phenomenon indicates that these areas are vulnerable under the earthquake and precautions must be taken. But under the designed earthquake, the maximum stress of the dam section is below the allowable stress, representing the dam is in a safe state and the strength requirement is satisfied.

Dynamic Response Analysis of Tailings Dam under Seismic Action

2015 ◽  
Vol 799-800 ◽  
pp. 746-750
Author(s):  
Ai Min Gong ◽  
Hai Yan Huang ◽  
Hui Ying Zhang
Keyword(s):  
Dynamic Stability ◽  
Time History ◽  
Reference Value ◽  
Element Model ◽  
Dynamic Responses ◽  
Response Analysis ◽  
Seismic Load ◽  
Seismic Action ◽  
Tailings Dam ◽  
Dynamic Time

A finite element model of tailiings dam was used to analyze the dynamic responses of the stress field, displacement and acceleration of the dam with the dynamic time-history response analysis method in this paper. The time-history curves of different responses were obtained. And an evaluation for dynamic stability of the tailings dam was also discussed. The analysis result shows that this case can provide a certain reference value for the dynamic calculation and the dynamic stability analysis of tailings dam under seismic load.

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