悬拉式脚手架优化设计及张拉控制分析

Optimization design and tension control analysis of suspension scaffold

目前,悬拉式脚手架已被广泛运用,但存在若干问题,尤其是张拉及相关施工,全凭感觉操作,隐患很大。文章提出一种特殊节点的临时下撑杆及相对独立张拉单元的概念,同时提出了“电路法”控制的张拉方法,并建立有限元模型对钢梁张拉程度控制进行仿真分析与验证。结果表明:采用“电路法”控制张拉时,能够使得本榀钢梁张拉时尽量不影响邻榀钢梁上立杆的支承状态及其底部应力的转移,因而形成一个相对独立的张拉单元。优化的张拉方法可充分提升悬拉式脚手架施工的安全性、可靠性、经济性。

At present,suspension scaffold has been widely used,but there are several problems,especially tension and related construction,all by feeling operation,hidden dangers are great.Therefore,this paper puts forward the concept of a temporary lower strut with special joints and a relatively independent tension element,puts forward the tension method of"circuit method"'control,and establishes the finite element model to simulate and verify the control of the tensile degree of the steel beam.The results show that when the"circuit method"is used to control the tension,the supporting state of the vertical bar and the stress transfer at the bottom of the adjacent steel beam can not be affected as much as possible,so that a relatively independent tension unit is formed.The optimized tensioning method can fully improve the safety,reliability and economy of suspension scaffold construction.