The Stability Study Of Outside Crawling Scaffold Of High-rise Building

With the rapid development of China’s economy and the promoting large-scale of urban construction, across the country in the city of high building and super-tall buildings have sprung up more and more, scaffold as an indispensable tools in the construction are also developed. There are economic cost is high, labor-intensity, use convenient, more security risks and many other drawbacks of the traditional scaffold, therefore, new scaffold came into being, attached to the lifting scaffolding with its outstanding economic, suitability is wide used. But this kind of scaffold’s technical requirements degree is higher than other types, especially on the safety of performance requirements, it carry the persistence load and live load by supporting with the wall, the load is large, once several components is instability, it will cause the entire structure collapsed, causing serious security incidents. To this kind of scaffold safety and economy have a comprehensive evaluation and understanding, we have make a fully understand of its stability.The article first describes the source and background of this issue, and the status quo of the scaffold’s stability at home and abroad. In the second chapter, first introduced the main structure of the safety interlock electric lift scaffold, and then calculated the dead load, construction live load and wind load which are the scaffold to withstand, and conclude that the actual work load. In the third chapter using SAP2000structure analysis software established a stress mode of the safety interlock electric lift scaffold main frame, and by the force analysis of the inside and outside of the two framework, found the pole which is at the connection of the main frame across and level of support structure near the building by the withstand pressure has been very close to its allowable stress, and make a suggestions that put a higher intensity pole in here or add a strong gluten. The chapter IV through finite element analysis software ANSYS Workbench to establish the finite element model of pulleys and bearing-beam which are the main bearing parts, obtained the stress concentration after the analysis, and through to the improvement of the model to improve the stress concentration condition. The chapter V through the engineering practice of the scaffold is the actual working condition was verified. At last, chapter VI summarized this project, and discussed the follow-up study of the research.The research results of this paper provide a reference for the improvement of the existing scaffold and the development of the new scaffold, we can further improve the safety performance of the scaffold, and reduce the occurrence of security incidents.