盘插式钢管式钢管脚手架应用研究与分析.docVIP

　　盘插式钢管式钢管脚手架应用研究与分析 --摘 要 盘插式脚手架是一种新型脚手架，它具有使用起来安全、便捷，可适用于各种场合，并且它不易损坏，且具有投资少利润大等优点，是现在工程施工比较理想的一种脚手架型式。随着建筑向复杂纵身空间发展，脚手架的极限承载力和变形的矛盾更加突显，但由于该脚手架研发出来时间不长，还有很多问题有待研究。 采用通用有限元分析软件SAP和ANSYS对试验中的脚手架体系建立三维杆系计算模型，考虑材料的弹塑性及结构的几何非线性，进行非线性极限承载力分析;并分别引入转动弹簧和轴向弹簧单元模拟梁柱节点半刚性以及支撑与节点的连接刚度，通过改变弹簧单元的刚度对整个结构进行参数分析，得到与试验结果较吻合的数值分析模型。试验和数值分析结果对比研究表明:支撑连接刚度对结构的极限承载力和侧向刚度影响显著，但梁柱节点的半刚性对其影响不大，为计算简便，梁柱节点可按铰接处理。 综合考虑试验研究和有限元参数分析的结果，对脚手架的节点连接形式进行改进设计，以Solidage, and has the advantages of lop space, ultimate bearing capacity and deformation of the contradictions of the scaffolding is highlighted, but the scaffolding any problems to be studied. Used General limited Yuan analysis soft established three dimensional Rod Department calculation model, consider material of play plastic and the structure of geometry nonlinear, for nonlinear limit hosted force analysis; and respectively introduced turned spring and axis to spring unit simulation beam node half rigid and support and node of connection stiffness, through change spring unit of stiffness on eter analysis, get and test results more anastomosis of numerical analysis model. parative study on the numerical analysis and experimental results shoate bearing capacity of lateral stiffness and significant, but the effect of semi-rigid joints on a modest, simple, can be articulated joints. Considering the results of experimental research and finite element analysis, to improvement the scaffold node form design, Solidodeling soft for implementation artifacts assembled set of modeling and structure. Through this study, experimental study on inserting scaffold model, aximum vertical doaximum force on the horizontal direction, pared s of the scaffold, see damaged scaffold upper portion of buckling behavior of scaffolding and has no significant deformation in the lower half. Analysis of spring scaffolding as the connection, get the stiffness of the joints a --nd gusset. By changing the stiffness of the spring, scaffolding analysis aximum lateral stiffne