摘要
通过扣件式钢管高大模板支架试验结果和有限元计算对比,表明用取值在一定范围的广义假想水平力来模拟支架的广义初始缺陷是合理的。而且,在计算广义初始缺陷对架体稳定承载力影响时,可采取在各横杆和立杆的连接点处施加广义假想水平力来模拟广义初始缺陷。综合试验结果和有限元计算对比分析,可得出:随着初始缺陷的增加,支模架的稳定承载力不断降低,且下降趋势较明显,因此要严格按相关规范进行施工,控制好支架的初始缺陷,是保证支架稳定的关键。
According to the contrast of experimental results of fastener-style steel tubular high-formwork-support and finite element method （FEM） analysis, it is indicated that it is rational to use generalized imaginary horizontal force in a certain limit of value to simulate generalized initial imperfections of the frame. And it is rational to apply generalized imaginary horizontal force in every joint of horizontal poles and upright stanchion when calculating the influence of stability capacity of formwork-support formed by generalized initial imperfections. Combining with the contrast of FEM analysis results and experimental results, it is pointed out that with the increase of initial imperfections, stability capacity of fonnwork support decrease constantly, and the decline trend is relatively obvious, so some key measures are put forward to guarantee the stability of the formwork support, such as constructing according to correlative codes strictly, controlling initial imperfections of scaffold well, etc.
出处
《施工技术》
CAS
北大核心
2009年第4期70-72,共3页
Construction Technology
基金
陕西省教育厅专项科研计划项目(08JK333)
财政部国家重点施工新技术研发项目(财企[2006]376号)
关键词
脚手架
扣件式钢管
模板高大支架
试验
稳定性
初始缺陷
scaffold
fastener-style steel tubular
high-formwork-support
experiment
stability
initial imperfection
作者简介
胡长明，西安建筑科技大学土木工程学院教授，博士，西安市雁塔路13号710055，电话：（029）85015189，E-mail：hu．tm@163．com
