摘要
为研究插盘式脚手架的力学性能,进行了节点单向、双向拉伸及单向压缩试验,得到其破坏模式及荷载-位移曲线;现场对单跨两步脚手架体系进行堆载试验,得到各杆件应力。建立三维杆系有限元计算模型,模拟脚手架体系堆载试验,采用弹簧单元模拟插盘式节点,轴向线刚度取节点试验值,通过改变弹簧单元的切向刚度和转角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,并与节点铰接的模拟结果进行对比。分析表明:插盘式节点采用弹簧单元可以更好地模拟结构的受力状态,需要考虑弹簧的轴向刚度和切向刚度,但可以忽略转角刚度。
To investigate the behavior of a disk-type steel scaffold,joints experiment on the load-deformation curve and the failure modes,and a heap load test of a two-story-frame on the member stress were conducted.Then the numerical analysis was carried out.In the numerical analysis,spring element was applied to simulate the disk-type joint.As the spring axial stiffness got by the joint test,the parameter analysis of tangent stiffness and rotational stiffness was carried out by comparing the results of experiment and numerical analysis.It shows that the stress status of numerical model with spring element could agree well with the experimental results;the effect of the connection tangent and axial stiffness is obvious to the numerical results,however,that of rotational stiffness is inconspicuous.
出处
《施工技术》
CAS
北大核心
2013年第14期94-97,共4页
Construction Technology
基金
国家科技支撑计划项目(2008BAJ08b06)
关键词
脚手架
插盘式
节点试验
堆载
有限元分析
弹簧单元
scaffolds
disk-type
joint test
loading
finite element analysis
spring element
