扣件式钢管模板支架稳定承载力修正系数研究  

Study on stability capacity correction coefficient of coupler steel tube falsework

作　　者：胡长明[1] 范小周[1] 宋方方[1] 程佳佳[1] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055

出　　处：《安全与环境学报》2011年第6期209-212,共4页Journal of Safety and Environment

基　　金：国家自然科学基金项目(50978219);陕西省重点学科建设专项资金项目(E01004)

摘　　要：通过分析6种单榀试验模型得出扣件式钢管模板支架的稳定承载力修正系数。利用有限元软件ANSYS对单榀试验模型进行模拟,分别得到扣件式钢管模板支架节点为完全刚性和半刚性的稳定承载力,进而得到由有限元计算所得稳定承载力修正系数。试验所得的稳定承载力修正系数和有限元计算所得的修正系数具有较好的一致性。因此,采用稳定承载力修正系数,能够较方便地得出扣件式钢管模板支架节点为完全刚性和半刚性的稳定承载力之间的关系。Prop system of steel tubular template is widely used in tall template prop system, in the actual engineering calculations of tall template prop system, fasteners node is designed to rigid mostly, thus it is not considered semi-rigid connections of fasteners node on the stability capacity influence. The obtained results are somewhat insecure. This paper analyzes the six kinds of single-Pin test model. We impose a level load on a node at the top of the model and obtain the values of displacement. And impose another value of displacement through finite element. Finally, get the stability capacity correction coefficient of steel tubular frame template by comparison of the value of two displacements. Then we simulate the single Pin test model by ANSYS, which is finite element software, create the single Pin test model both with node rigid and semi-rigid. We apply the vertical load on the top of every node, and Obtain stability capacities both with node rigid and semi-rigid, and then get the stability capacity correction coefficient of steel tubular frame template by comparison of the stability capacities. The comparison shows that： the values of lateral stiffness correction factor between the test and finite element analysis are in good agreement. Therefore, it is more convenient to draw the relationship of stability capacity which the node of steel tubular scaffolding is completely rigid or semi-rigid. If you adopt the stable capacity correction factor, the results are somewhat safe. So we can come up with steel tubular frame template stability capacity of semi-rigid fastener node, which is more in line with reality. So it can guide the construction safely. The research of this paper is a critical significance for prop system of steel tubular template. In addition, the research results also can be referenced in many practical engineering calculations, and it will play a guiding role.

关 键 词：土木建筑工程施工 稳定承载力修正系数 单榀试验 有限元分析 

分 类 号：TU392[建筑科学—结构工程]