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Alternative TitleFailure mechanism of the arch of concrete filled steel tube supports component
单仁亮1; 肖禹航1; 刘珂铭2; 戴旭1; 赵伟1; 闫伟1; 陈宇翔3
Source Publication煤炭学报
Other AbstractBased on six equivalent loads the concrete-filled steel tube (CFST) supporting structure used in deep-seated soft rock roadway, are loaded on the 1/4 CFST circular arches. The influence of mechanical properties with different rise-span ratios and steel fiber volume parameters are studied. The experimental results show that the bottom of CFST circular arch is damaged by compressing, bending and shearing. The apex of arch is mainly influenced by compressive stress. Both apex and bottom of the arch are the weakest cross sections. The bearing load and the stiffness of structure are enhanced with the increase in rise-span ratios. The flexibility is increased in test specimen with 1%-1.5% steel fiber volume parameters while little difference can be found in ultimate load in contrast to the one without steel fiber. With continuing increase in steel fiber volume, the stiffness of specimen is increasing and ultimate load is decreasing. Therefore, 1% - 1.5 % volume parameter of the steel fiber is suitable. Besides, by using numerical simulation, the stress forms of the dangerous sections of the specimens and the influence of bearing capacity on the section dimension, risespan ration, wall thickness of steel tubes are further studied. Meanwhile, combined with the experimental analysis and numerical results,theoretical analysis is proposed from three aspects:Section strength,local instability and ove,'all in- stability. The cause of local instability and calculation formula for the ultimate bearing capacity of circular arch CFST are obtained. Finally,on the basis of practical engineering condition, the design example of CFST is introduced.
Keyword钢管混凝土 圆弧拱 支架 局部失稳 整体失稳
Indexed ByCSCD
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Cited Times:2[CSCD]   [CSCD Record]
Document Type期刊论文
Recommended Citation
GB/T 7714
单仁亮,肖禹航,刘珂铭,等. 钢管混凝土支架构件—圆弧拱破坏机理研究[J]. 煤炭学报,2018,43.0(007):1918-1929.
APA 单仁亮.,肖禹航.,刘珂铭.,戴旭.,赵伟.,...&陈宇翔.(2018).钢管混凝土支架构件—圆弧拱破坏机理研究.煤炭学报,43.0(007),1918-1929.
MLA 单仁亮,et al."钢管混凝土支架构件—圆弧拱破坏机理研究".煤炭学报 43.0.007(2018):1918-1929.
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