摘要
为了进一步研究蜂窝轻型门式刚架的抗震性能,对该新型结构固有频率的理论计算公式进行推导,利用有限元ABAQUS建立数值模型,对不同扩张比、不同跨度的六边形蜂窝轻型门式刚架进行数值模拟,分析扩张比和跨度对蜂窝轻型门式刚架固有频率的影响规律,同时将蜂窝轻型门式刚架与同截面实腹刚架、扩张前实腹刚架的固有频率进行对比分析。经对比分析得知:在一定扩张比条件下,蜂窝轻型门式刚架固有频率要高于扩张前实腹刚架;当跨度相同时,一定扩张比的蜂窝轻型门式刚架固有频率要高于同截面实腹刚架。对于蜂窝轻型门式刚架和同截面实腹刚架,随着跨度的增大,两者频率逐渐减小并且趋于一致。
This paper is motivated by the need for delving into the seismic performance of the castellated portal frame and developing the theoretical calculation formula of natural frequency in this new structure. This investigation consists of using ABAQUS finite element program to simulate the hexagonal castellated portal frame of light-weight steel under different expansion ratio and different span ratio; analyzing the influence law of the expansion ratio and span on the castellated portal frame of light-weight steel; and comparing and analyzing the hexagonal castellated portal frame of light-weight steel and the same section size solid-web type portal frame and non-heightened portal frame. Contrast and analysis establish that,under a certain expansion ratio,castellated portal frame of light-weight steel has a natural frequency higher than that of non-heightened portal frame; under the same span,the castellated portal frame of light-weight steel has a natural frequency higher than that of same section size solid-web type portal frame; and both the castellated portal frame and the same section size solid-web type portal frame may have a natural frequency gradually decreasing and tending to be consistent,due to an increasing span.
出处
《黑龙江科技大学学报》
CAS
2015年第5期545-550,共6页
Journal of Heilongjiang University of Science And Technology
基金
黑龙江省教育厅科学技术研究项目(12521476)
关键词
蜂窝轻型门式刚架
抗震性能
ABAQUS
扩张比
固有频率
castellated portal frame of light-weight steel
seismic performance
ABAQUS
expansion ratio
natural frequency
