scholarly journals Studies of Reasonable Magnitude of Additional Force And Effect of Reinforcement In Reinforcing of Steel Truss Structure

2021 ◽  
Vol 5 (3) ◽  
pp. 313-325
Author(s):  
Yong-il Song ◽  
Il Ju Ri
Keyword(s):  
Strain Energy ◽  
Internal Force ◽  
Truss Structure ◽  
Minimum Condition ◽  
Additional Force ◽  
Steel Truss

 When the truss structure is reinforced in operating state the additional force is given to it.We propose the method for determining the reasonable magnitude of additional force to reduce the internal force by minimum condition strain energy of truss

A Two Step Damage Prognosis Method for Beam-Like Truss Structures

2014 ◽  
Vol 578-579 ◽  
pp. 1092-1095
Author(s):  
Hao Kai Jia ◽  
Ling Yu
Keyword(s):  
Finite Element Method ◽  
Strain Energy ◽  
Truss Structure ◽  
Truss Structures ◽  
Second Step ◽  
The Finite Element Method ◽  
Modal Strain Energy ◽  
Damage Prognosis ◽  
Modal Curvature ◽  
Simulation Results

In this study, a two step damage prognosis method is proposed for beam-like truss structures via combining modal curvature change (MCC) with modal strain energy change ratio (MSECR). Changes in the modal curvature and the elemental strain energy are selected as the indicator of damage prognosis. Different damage elements with different damage degrees are simulated. In the first step, the finite element method is used to model a beam-like truss structure and the displacement modes are got. The damage region is estimated by the MCC of top and bottom chords of a beam-like truss structure. In the second step, the elemental MSECR in the damage region is calculated and the maximum MSECR element is deemed as the damage element. The simulation results show that this method can accurately locate the damage in the beam-like truss structure.

scholarly journals Operational Modal Analysis of the Laboratory Steel Truss Structure

2019 ◽  
Vol 40 ◽  
pp. 800-807
Author(s):  
Lukáš Maliar ◽  
Daniela Kuchárová ◽  
Ľuboš Daniel
Keyword(s):  
Modal Analysis ◽  
Operational Modal Analysis ◽  
Truss Structure ◽  
Steel Truss

Damage Detection Method Based on Fractal Correlation Dimension for Steel Truss Structure

2014 ◽  
Vol 578-579 ◽  
pp. 1228-1232
Author(s):  
Shou Jun Du ◽  
Li Bin Shi ◽  
Li Mei Zhang
Keyword(s):  
Correlation Dimension ◽  
Detection Method ◽  
Fractal Theory ◽  
Sudden Change ◽  
Truss Structure ◽  
Structural Vibration ◽  
Damage Location ◽  
Damage Degree ◽  
Steel Truss ◽  
Fractal Correlation Dimension

Damage of steel truss structure can be determined by the sudden change of correlation dimension which was obtained from the structural vibration response through fractal theory. The streel truss structure was as exampled to verify this method. The results show that: this method can determine the damage location of the structure whether single damage or multi damage and can preliminarily judge the damage degree.

scholarly journals Estimation of natural frequencies of the laboratory truss structure with output only subspace and frequency-domain techniques

2020 ◽  
Vol 313 ◽  
pp. 00003
Author(s):  
Ján Kortiš ◽  
Lukáš Maliar ◽  
Ľuboš Daniel
Keyword(s):  
Modal Analysis ◽  
Natural Frequencies ◽  
Structural Testing ◽  
Truss Structure ◽  
Current State ◽  
Steel Truss ◽  
Output Only ◽  
Frequency Domain Techniques ◽  
Non Destructive ◽  
Destructive Methods

Non-destructive methods of structural testing are preferred to identify their current state because they do not damage the structure. Modal analysis is one of these methods that can be used for a comprehensive assessment of structural measurements. Its main advantage is that it can be used for variety applications. The paper presents an application of operational modal analysis to determine modal parameters of a laboratory steel truss structure. Its goal is to make contribution to the still unfinished development of modal analysis in the area of comprehensive application. There is important to try to use it and especially try to derive some basic generally applicable rules. It is an important step for experimental modal analysis before it can be widely used and accepted in engineering applications.

Comparison of Structural Support Schemes for Forestage Lighting Gallery in Lecture Hall

2014 ◽  
Vol 533 ◽  
pp. 199-204
Author(s):  
Chuan Kai He ◽  
Hui Yuan Li ◽  
Xi Zhou Lv
Keyword(s):  
Steel Frame ◽  
Truss Structure ◽  
Structural Safety ◽  
Lecture Hall ◽  
Structural Support ◽  
Advantages And Disadvantages ◽  
Steel Truss

This study proposes three structural support schemes for a forestage lighting gallery in a steel truss structure transformed into a lecture hall. The advantages and disadvantages of these schemes are analyzed and compared in terms of structural safety, disturbance implications, and professional cooperation on architectural decoration. A separate light steel frame supporting the forestage lighting gallery has more advantages than only the original truss components and is thus more suitable for the project. The three schemes are compared for the reference of designers confronting similar problems.

Analysis on a Steel-Concrete Hybrid Structure Temperature Effect and Supporting Block Design

2010 ◽  
Vol 29-32 ◽  
pp. 1862-1865 ◽  
Author(s):  
Ze Liang Yao ◽  
Guo Liang Bai ◽  
Fa Ning Dang
Keyword(s):  
Temperature Effect ◽  
Power Plants ◽  
Industrial Structure ◽  
Block Design ◽  
Thermal Power ◽  
Vertical Direction ◽  
Fem Analysis ◽  
Internal Force ◽  
Hybrid Structure ◽  
Steel Truss

The steel-concrete hybrid structure is a new special industrial structure in large thermal power plants. It is composed of a spatial steel truss and steel-concrete tubular columns. Its stiffness and mass is highly non-uniform at vertical direction. Its temperature effect is obvious because its steel truss is a high order statically indeterminate structure. Types and characteristics of temperature load prescribed in codes are introduced. Temperature effect of the steel-concrete hybrid structure is calculated by FEM analysis software SAP2000 in four different supporting blocks. The structural internal force and distortion under temperature effect is analyzed. The influence of supporting blocks on the structual temperature effect is analyzed. The structural supporting block form to advantageously release its temperature effect is presented. Some advice is presented based on the analysis results.

Nanoscale Order in ZnTe:(Cd, O)

2013 ◽  
Vol 740 ◽  
pp. 483-487 ◽  
Author(s):  
Vyacheslav A. Elyukhin
Keyword(s):  
Free Energy ◽  
Strain Energy ◽  
Continuous Phase ◽  
The Self ◽  
Minimum Condition ◽  
Co Doping ◽  
Self Assembling ◽  
Temperature Ranges ◽  
Nanoscale Order ◽  
Oxygen Atoms

Self-assembling of 1O4Cd identical tetrahedral clusters resulting to nanoscale order in ZnTe:(Cd, O) is presented. Such co-doping transforms ZnTe into CdxZn1-xOyTe1-yalloy. The decrease of the strain energy is a cause of this phenomenon. The self-assembling conditions are obtained by the minimum condition of the free energy of ZnTe:(Cd, O) at the Cd and oxygen in the dilute and ultra dilute limits, respectively. An occurrence of 1O4Cd clusters and completion of self-assembling (all oxygen atoms are in clusters) are results of the continuous phase transitions. The temperature of the occurrence of self-assembling does not depend on the oxygen content and it is a function of Cd concentration only. CdxZn1-xOyTe1-ywith all oxygen atoms in clusters may be obtained in temperature ranges fromT= 270 °C (x= 0.002,y= 1×10-4) toT= 620 °C (x= 0.02,y= 1×10-4) and fromT= 240 °C (x= 0.005,y= 0.001) toT= 580 °C (x= 0.02,y= 0.001).

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