自密实混凝土拱形结构脚手架的力学性能研究

Study on mechanical properties of scaffold for self-compacting concrete arch structure

拱形结构造型优美、受力合理,在建筑结构的设计中被广泛使用,但是由于自身结构的复杂性,在对其进行浇筑时,胶凝材料的选取、安全性等方面,导致施工过程易出现一些问题。为研究拱形结构在施工过程中的安全性、稳定性及新材料C60高性能自密实混凝土的工程效果,以某大跨拱形结构为工程背景,利用有限元软件建立施工阶段拱形结构精细化模型,将荷载分为三种工况施加到模型中,综合分析脚手架在施工过程中的强度及稳定性,并结合现场施工情况对C60自密实混凝土的工程效果做出评价,得出了有益的结论。

The arch structure is beautiful in shape and reasonable in force,which is widely used in the design of building structure.However,due to the complexity of structure,the selection of cementitious materials and the safety during pouring of concrete always lead to some problems in the construction process.In order to study the safety and stability of the arch structure in the construction process,and the engineering effect of the new material C60 high-performance self-compacting concrete,this paper takes a large-span arch structure as the engineering background,and establishes a refined model of the arch structure in the construction stage by the finite element software.There are three load working conditions in the model.The strength and stability of the scaffold during the construction process are comprehensively analyzed,and the engineering effect of C60 self-compacting concrete is evaluated in combination with the site construction,draw useful conclusions.