带自适应支座的钢框架结构抗变形性能分析

Analysis of the deformation resistance of the frame structure

研究了带自适应不均匀沉降支座的钢框架结构的抗变形性能,通过物理相似试验模拟了竖向地表变形引起的基础沉降,得出了安装支座装置的框架结构基础位移值-柱脚不均匀沉降差曲线近似周期波段线,框架附加变形值随着上下波动,平均值仅为原结构的1/3~1/5。通过建立带土体的足尺寸结构有限元模型考虑土体-基础-上部结构之间的相互约束作用,发现安装支座装置后,土体应力最大值减小而分布范围增大,说明上部结构和地基之间的相互作用有所增加。

In this paper,a kind of steel frame structure which can adapt to inhomogeneous settlement is installed. The basic subsidence caused by surface deformation was simulated by physical similarity test, and finite element model I was established consistent with the physical test. Frame structure of the new device foundation displacement-column feet uneven settlement difference curve approximation cycles. Therefore,the frame additional deformation value fluctuates with fluctuation,and the average is only 1/3 ~ 1/5 of the original structure. By establishing the full-scale finite element model II with soil,considering the interaction of soil-base-superstructure,after the installation of the support device,the maximum value of soil stress decreases and the distribution range increases, and the interaction between the superstructure and the foundation increases.