采动区钢框架结构柱脚的内力变化规律

以煤矿采动区采动过程地表的动态变形规律为基础,采用有限元软件模拟了地表钢框架结构柱脚在整个地表动态变形过程中的内力变化规律.分析了柱脚内力与地表变形之间的关系及其柱脚最大内力值对应的地表位置,并将地表变形引起的框架结构柱脚附加内力和初始内力值进行对比,结果表明抗采动钢框架结构柱脚设计应当考虑附加内力的影响.

Internal Force Variation Law of Steel Column-Heels in Mining Subsidence Area

On the basis of the regularity of surface dynamic deformation in underground mining,this paper models by finite element software the internal force variation law of steel column-heels in the process in mining subsidence area.Analysis is carried out on the relationship between the internal forces of steel column-heels and the surface deformation as well as on the surface location which the maximun internal force of steel column-heels is directed at,and contrast is made between the additional internal forces caused by surface deformation and the initial internal forces.The results reveal that the influences of additional internal forces should be taken into account in the design of the steel frame footing in mining subsidence area.