| 冷弯加劲高强方钢管柱受力性能及经济性分析 |
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| 引用本文： | 庞士云,王卫永,谭兴奎,黄丹,王子琦.冷弯加劲高强方钢管柱受力性能及经济性分析[J].重庆大学学报(自然科学版),2023,46(10):1-14. |
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| 作者姓名： | 庞士云 王卫永 谭兴奎 黄丹 王子琦 |
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| 作者单位： | 1.重庆大学 土木工程学院 重庆 400045;2.重庆苯特钢结构有限公司，重庆 400707 |
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| 基金项目： | 重庆市自然科学基金（cstc2021jcyj-jqX0021）。 |
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| 摘 要： | 工程中常采用在截面上布置加劲肋的方法来增强构件的稳定性能。为研究冷弯加劲对高强钢管柱受力性能的影响，评估加劲高强钢管柱的经济性。采用有限元ABAQUS软件，建立了冷弯加劲钢管柱轴心受压分析模型。通过考察加劲形状、加劲个数、加劲间距及加劲大小对Q355钢管柱受力性能的影响，确定最优截面形式，进而分析在极限承载力相当时，高强Q690冷弯加劲钢管柱比普通Q355钢管柱用钢量的节约程度。结果表明，设置冷弯加劲可以明显地提升钢管柱轴心受压承载力，冷弯加劲对钢管柱承载力的提高作用随着加劲个数的增加基本保持不变。采用单个半圆弧加劲时，对构件承载力的增强作用便可达到良好的效果。冷弯加劲之间的距离对构件的稳定承载能力基本没有影响。加劲圆弧半径建议取板件厚度的2倍。承载力相当时，冷弯加劲Q690钢管柱的用钢量比Q355钢管柱节省35%左右。
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| 关 键 词： | 冷弯加劲 柱 受力性能 参数分析 高强钢 用钢量 |
| 收稿时间： | 2023/4/5 0:00:00 |
Load bearing capacity and economic analysis of high-strength steel square columns with cold-formed stiffeners |
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| PANG Shiyun,WANG Weiyong,TAN Xingkui,HUANG Dan,WANG Ziqi.Load bearing capacity and economic analysis of high-strength steel square columns with cold-formed stiffeners[J].Journal of Chongqing University(Natural Science Edition),2023,46(10):1-14. |
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| Authors: | PANG Shiyun WANG Weiyong TAN Xingkui HUANG Dan WANG Ziqi |
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| Affiliation: | 1.College of Civil Engineering, Chongqing University, Chongqing 400045, P. R. China;2.Chongqing Bente Steel Structure Co., Ltd., Chongqing 400707, P. R. China |
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| Abstract: | In practical application, arranging stiffeners on a section is a common method used to enhance the stability of structural members. This study focuses on investigating the effects of cold-formed stiffeners on the mechanical properties of high-strength steel tubular columns and evaluating the cost effectiveness of these stiffened columns. An axial compression analysis model for cold-formed stiffened steel tubular columns was established by using finite element ABAQUS software. The study explored the optimal stiffening configuration by investigating the influence of stiffening shape, the number of stiffeners, stiffening spacing and stiffening size on the mechanical performance of Q355 steel pipe columns. Furthermore, the reduction in steel consumption for high-strength Q690 cold-formed stiffened steel pipe columns was analyzed when their ultimate bearing capacity was equivalent to that of ordinary Q355 steel pipe columns. The results show that the addition of cold-formed stiffeners significantly improves the axial compression bearing capacity of steel pipe columns. Interestingly, the improvement in bearing capacity remains consistent even as the number of stiffeners increases. Notably, using a single semicircular arc stiffener yields favorable results in enhancing member bearing capacity. The spacing between cold-formed stiffeners has minimal effects on the overall stability of the members. It is recommended that the radius of the stiffener arc twice the thickness of plate. When achieving equal bearing capacity, the steel consumption for cold-formed stiffened Q690 steel pipe column is about 35% lower than that of Q355 steel pipe columns. |
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| Keywords: | cold-formed stiffener column bearing capacity parameter analysis high strength steel steel consumption |
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