The Research For The Whole Precess Of Large Span Steel Structure Sliding Method Mechanical Behavior

In recent years, as the rapid growth of large scale steel truss, the construction techniques are facing increasing challenges. During large scale steel truss construction process, there are many factors correlated with each other. Meanwhile, lots of uncertainties exist as well. These result in the complexity of internal force distribution and variability of final moulding force. As a result, it is necessary to explore and study the mechanical behavior of modern construction process. We need adequate construction process analysis and reasonable construction plan selection to ensure safety, quality, duration and economy.Based on the analysis of Shenyang Olympic Gym Construction using large scale steel truss sliding methodology, this article combines process time-varying mechanics and uses advanced finite element analysis software– ANSYS to fully explore the large scale steel truss sliding methodology and the mechanical behavior during the process. The paper's main content includes:Briefly introduction of common large scale steel techniques and the most updated research. Confirmation of the advantages of sliding method contrition techniques.Statement of the process characteristic of sliding method construction, the sliding partition, hanger select and distribution, assembly jib installation, and power machine selection and control.In this study, basic construction time-varying mechanics is applied and simplified mechanical analysis model is created. Through the method of killing activating elements in ANSYS, this paper simulates and analyzed strain of truss system's stress during cumulative sliding, compares difference between two group sliding system and three group system, investigates process effectiveness in construction, and studies the reliability of the method of killing activating elements by comparing the simulated computation results to the real data. In addition, the usability of ANSYS in steel truss sliding construction analysis is affirmed, providing some guideline for future similar mechanical behavior analysis.Experimented on the Shenyang Olympic Gym, through analysis using ANSYS, the difference between single arc cumulative slide in two assembly jig and double arcs cumulative slide is analyzed. The effect of slide desynchrony on truss system is presented. Further, improvement methods are proposed based on the current sliding desynchronized limit. Finally, by comparing the linearity to nonlinearity in large scale span steel truss construction process, the necessity of nonlinear analysis is validated.