门式刚架柱滞回性能研究

根据门式刚架楔形H型钢柱失稳时局部和整体相关屈曲的特点,提出能考虑其相关屈曲特征和滞回性能的数值模拟方法.通过8根大宽厚比楔形钢柱的试验结果与数值模拟和理论数值解的比较表明,数值模拟方法是一种研究大宽厚比楔形构件滞回性能的有效方法.选取一组工程常用构件进行往复荷载作用下的数值模拟分析,比较腹板宽厚比的影响,认为此类构件具有一定的延性和耗能性能,证明《门式刚架轻型房屋钢结构技术规程》中的相关规定偏于不安全.

Hysteretic Behavior of Tapered H-Section Steel Columns in Gabled Frames

Based on the characteristic of local-overall interactive buckling, the numerical simulation method involved deformation characteristic of interactive buckling and hysteretic behavior is proposed. The experimental results and theoretical calculations on 8 tapered H-section steel columns with large plate width-to-thickness ratio have proved to be in agreement with numerical simulation reasonably. The results show that the simulation method is an effective way to study hysteretic behavior of tapered components with large plate width-to-thickness ratio. The analysis of hysteretie behavior on a set of representative components in the project is carried out. Through comparison with the effects of width- to-thickness ratio of the web, it is found that this kind of components is of certain ductility and energy dissipation, while the relevant regulations are comparatively unsafe in the Technical specification for steed structure of light-weight Buildings with gabled frames.