Study On Wind Resistance Performance Of Double Pole Scaffold With Couplers Structure

Scaffolding is an important temporary measure in engineering construction,and its safety management is particularly important in the during construction process.In recent years,scaffolding has been more and more accidentally collapsed due to wind load.Therefore,the research on wind-resistant performance of scaffolding is of great significance.In this paper,the method of numerical simulation is used finite element software mainly,and the main work is following:(1)The static wind load simulation of different strengths is carried out for the fastener-type scaffolds of nine different working conditions,which are composed of different wall parts arrangement forms,scissors support angles and safety net wind resistance coefficients.(2)Time-history wind load simulation of different strengths is carried out for the fastener-type scaffolds of nine different working conditions,which are composed of different wall parts arrangement forms,scissors support angles and safety net wind resistance coefficients.(3)The quasi-static load simulation is carried out on the structural forms of nine different wall-linkings composed of different lengths and numbers of pre-buried steel pipes.The main research results are as follows:(1)According to the study of static wind load of different strengths of scaffolding,the internal force and displacement division rules of fastener scaffolding are obtained.The stress is the largest at the wall-linking and gradually decreases toward the periphery;the displacement is the smallest at the wall-linking and gradually increases toward the periphery.(2)Through the orthogonal analysis method,the force analysis of the nine kinds of fastener scaffolding structures with three levels and three factors is analyzed.The most influential factor on the stability of the scaffolding is the arrangement of the wall parts.The most advantageous arrangement is the two-step two-span wall-linking,50°scissors support and 0.8 safety net wind blocking coefficient.(3)Through the force analysis of the fastener-type scaffold under the time-history wind load,and comparing with the static wind load,it is found that the dense-type scaffold at the height of 50 m,the wind vibration coefficient should not be taken according to the scaffolding specification.According to analysis results described herein,wind vibration coefficient should take 2.5.(4)Through the mechanical analysis of the wall parts of different structural forms,it is concluded that when the number of pre-buried steel pipes changes from 1 to 2,the performance improvement of the wall-linking is very obvious.Combined with the construction cost and other issues,this paper proposes that the best model for wall-linking is that the length of the pre-buried steel pipe is 200 mm,and the number of pre-buried steel pipes is two.Through numerical simulation analysis,to provide some data for reference in the development of engineering applications as well as standard scaffolding scaffolding.There are still many issues to be considered about scaffolding safety,such as seismic research on scaffolding,research on scaffolding transmission systems,and other types of scaffolding research.I hope that the later scholars can do more in-depth research on the basis of this article.