摘要
介绍并验证了采用ABAQUS有限元软件计算钢管混凝土短柱极限承载力的方法,计算分析了不同脱空率下钢管混凝土短柱破坏模式及极限承载力,对比分析了在脱空部位设PBL连接键后脱空钢管混凝土短柱的受力性能。结果显示:随着脱空率的增大,钢管混凝土短柱的极限承载能力不断下降;在脱空部位设PBL连接键后,钢管混凝土的破坏模式发生变化,破坏阶段的承载能力有所提高,且当脱空率在0~4%或大于16%范围内时,PBL连接键对脱空钢管混凝土短柱极限承载力起增强作用,而当脱空率约在4%~16%范围内时,设PBL的钢管混凝土短柱极限承载力反而低于原脱空钢管。
This paper introduced and verified the method of using ABAQUS finite element software to calculate the ultimate bearing capacity of concrete-filled steel tubular short column. Then, it calculated the ultimate bearing capacity and analyzed the failure mode of the concrete-filled steel tubular short column under different separation ratio. Finally, the paper contrasted the mechanical behavior of concrete-filled steel tubular short column when setting PBL in the separation area. The re sults showed that the ultimate bearing capacity of concrete-filled steel tubular short column was declining with the increase of separation ratio. The failure modes of concrete-filled steel tube would be changing when setting PBL in the separation area. The bearing capacity of the failure stage was improved. Setting PBL in the separation area, the ultimate bearing capacity of concrete-filled steel tubular short column was improved when the separation ratio within the scope of 0 -4% or greater than 16%. However the ultimate bearing capacity was decreased when the separation ratio within the scope of 4% - 16%.
作者
俞文龙
Yu Wenlong(China Railway 17th Bureau Group Co. Ltd. , Taiyuan Shanxi 030006, China)
出处
《铁道建筑技术》
2017年第3期28-31,40,共5页
Railway Construction Technology
基金
中铁十七局集团有限公司科技研究开发计划项目(2015-91)
关键词
钢管混凝土
脱空
PBL连接键
力学性能
concrete-filled steel tube
separation
PBL connecting key
mechanics behavior
