Fire Protection of Steel Space Truss Structures

2013 ◽  
Vol 671-674 ◽  
pp. 479-483
Author(s):  
Kai Xiang ◽  
Guo Hui Wang ◽  
Bi Zhao
Keyword(s):  
Fire Protection ◽  
Steel Structures ◽  
Truss Structure ◽  
Truss Structures ◽  
Research Results ◽  
Advantages And Disadvantages ◽  
Screen Method ◽  
Space Truss ◽  
Protection Method ◽  
Space Truss Structure

The fire protection method of steel space truss structures was researched. Fire protection methods of steel structures were listed. For steel space truss structures, the advantages and disadvantages of fire protection methods were introduced. The screen method was suitable for fire protection of steel space truss structures. One project of fire protection of steel space truss structure was shown as an example. The process of screen method was provided for fire protection of steel space truss structures. According to this project, the technology of fire protection of steel space truss structures was enriched. The research results could help to deal with fire protection of steel space truss structures.

Dynamic Response Analysis for Space Grid Structure with Different Boundary Conditions

2013 ◽  
Vol 275-277 ◽  
pp. 972-976
Author(s):  
Ying Cai Mu
Keyword(s):  
Dynamic Response ◽  
Natural Vibration ◽  
Truss Structure ◽  
Truss Structures ◽  
Response Analysis ◽  
Space Truss ◽  
Structure Vibration ◽  
Support Conditions ◽  
Space Truss Structure ◽  
Frequency Diagram

Through the ansys software, we analysised the space truss structures for its dynamic response and observed its formation of frequency diagram . Based on the analysis of the observation ,natural vibration rules of the space truss structure are discussed. In the process of analysis, We got the conclusions of the support conditions of the change and support amount of adjustment to the influence of the space truss structure vibration frequency.

Damage Identification of Space Truss Structure Based on Strain Modal and Wavelet Transform

2015 ◽  
Vol 744-746 ◽  
pp. 33-37 ◽  
Author(s):  
Wei Ran Liu ◽  
Qi Lian Li ◽  
Hong Liang Yue
Keyword(s):  
Wavelet Transform ◽  
Structural Damage ◽  
Damage Identification ◽  
Damage Index ◽  
Truss Structure ◽  
Truss Structures ◽  
Wavelet Coefficients ◽  
Modal Strain Energy ◽  
Space Truss ◽  
Space Truss Structure

Based on the characteristics of space truss structures, the concept of modal strain energy is introduced and square difference in elemental modal strain is presented. Through the square difference in elemental modal strain and wavelet transform, this paper presents a method for space truss structure damage recognition. The structural damage index is presented with the change of wavelet coefficients. Numerical simulation results show that: this method is effective to locate the single, multiple damages and light, severe damage with the first mode information. The preliminary tries for damage extent identification were made by the wavelet coefficients.

Vibration Control of Space Truss Structure with Viscoelastic Laminated Composite Damper

2014 ◽  
Vol 971-973 ◽  
pp. 860-863 ◽  
Author(s):  
Bao Xian Jia ◽  
Feng Gao ◽  
Wen Feng Bian
Keyword(s):  
Vibration Control ◽  
Resonance Region ◽  
Truss Structure ◽  
Pulse Excitation ◽  
Control Effect ◽  
Modal Strain Energy ◽  
Viscoelastic Composite ◽  
Optimal Position ◽  
Space Truss ◽  
Space Truss Structure

This paper works on the vibration control of the space truss structure. The damper made of viscoelastic composite was designed according to the configuration parameters of the truss structure. The parameters of damper were obtained by using the method of modal strain energy. The optimal position configuration of the damper was determined. The truss in the time domain and frequency domain was analyzed. The dynamic characteristics of three structures which are without damper, with damper in the random position configuration and with damper in the optimal position configuration were compared in the sweep excitation and pulse excitation. The result shows that the structure with damper in the optimal position configuration has a great improvement in the amplitude of vibration in the first resonance region and the amplitude attenuation of the truss. The space truss structure with viscoelastic composite damper has excellent vibration control effect.

scholarly journals Mechanism and Control of Mobile Robot on H-Type Space Truss Structure.

1996 ◽  
Vol 62 (602) ◽  
pp. 3818-3825
Author(s):  
Toshio FUKUDA ◽  
Hideo MATSUURA ◽  
Fumihito ARAI ◽  
Kenji NISHIBORI ◽  
Takashi OGURI ◽  
...  
Keyword(s):  
Mobile Robot ◽  
Truss Structure ◽  
Type Space ◽  
Space Truss ◽  
Space Truss Structure ◽  
And Control

Fire Protection Studies on Steel Staggered-Truss Structure Based on Analytic Hierarchy Process

2010 ◽  
Vol 26-28 ◽  
pp. 608-611 ◽  
Author(s):  
Chang Kun Chen ◽  
Dong Zhang
Keyword(s):  
Analytic Hierarchy Process ◽  
Fire Protection ◽  
Design Method ◽  
Fire Retardant ◽  
Comparative Investigation ◽  
Truss Structure ◽  
Analytic Hierarchy ◽  
Protection Method ◽  
The Stability ◽  
Hierarchy Process

A new design method for fire protection, based on analytic hierarchy process (AHP), was put forward, to explore an economic and secure strategy for fire protection of steel staggered-truss structure (SSTS). The chords and web members of SSTS were classified into different important grades by AHP according to the influence which components make on the stability of structure at elevated temperature. And the components are protected by different levels based on the important grades. Furthermore, a comparative investigation was conducted in order to appraise the economic and practical performance of the provided new fire protection method with traditional fire protection. The results indicate that the proposed fire protection strategy for SSTS based on AHP could achieve higher security with the same volume of fire retardant coatings.

scholarly journals Semi-Active Friction Damping of Large Space Truss Structures

2004 ◽  
Vol 11 (3-4) ◽  
pp. 173-186 ◽  
Author(s):  
L. Gaul ◽  
H. Albrecht ◽  
J. Wirnitzer
Keyword(s):  
Vibration Suppression ◽  
Flexible Structures ◽  
Truss Structure ◽  
Truss Structures ◽  
Friction Damping ◽  
Large Space ◽  
Normal Forces ◽  
Space Truss ◽  
Active Friction ◽  
Local Feedback

The present approach for vibration suppression of flexible structures is based on friction damping in semi-active joints. At optimal locations conventional rigid connections of a large truss structure are replaced by semi-active friction joints. Two different concepts for the control of the normal forces in the friction interfaces are implemented. In the first approach each semi-active joint has its own local feedback controller, whereas the second concept uses a global, clipped-optimal controller. Simulation results of a 10-bay truss structure show the potential of the proposed semi-active concept.

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