空心率对中空夹层钢管混凝土组合柱耐撞性能影响

王丙斌; 王蕊

doi:10.11883/bzycj-2016-0143

空心率对中空夹层钢管混凝土组合柱耐撞性能影响

doi: 10.11883/bzycj-2016-0143

王丙斌,
王蕊^,

太原理工大学建筑与土木工程学院, 山西太原 030024

基金项目:

山西省应用基础研究项目 201701D211006

详细信息

作者简介:
王丙斌(1991—), 男, 硕士研究生

通讯作者:
王蕊, 506727225@qq.com

中图分类号: O347.3
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- 被引次数: 0
出版历程
- 收稿日期: 2016-05-25
- 修回日期: 2016-08-26
- 刊出日期: 2018-01-25

Effect of hollow ratio on crashworthiness of stainless steel-concrete-steel double-skin tubular columns

WANG Bingbin,
WANG Rui^,

College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

摘要

摘要: 以外层为不锈钢的中空夹层钢管混凝土柱为研究对象，采用有限元分析软件，模拟该类构件在低速横向冲击下的动力响应，讨论空心率对其耐撞性能的影响，并提出稳固性因数来评估结构的耐撞性能，同时展开3组实验对有限元模拟典型算例进行校正。试件的耐撞性能主要从抗冲击能力与冲击过程中结构的稳固性方面讨论。研究结果表明：空心率在0~0.73范围内，其对冲击力平台值影响不明显，试件抗冲击能力没有明显变化；空心率大于0.73，冲击力平台值明显下降，试件抗冲击能力明显减弱。空心率在0~0.6范围内，试件冲击过程中的结构稳固性因数保持在一个较高水平；空心率0.6~1.0范围内，试件冲击过程的结构稳固性因数明显降低，且呈单调下降趋势。
- 不锈钢 /
- 冲击载荷 /
- 中空夹层钢管混凝土 /
- 空心率
Abstract: In this paper we simulated the dynamic response of stainless steel-concrete-steel double-skin tubular columns under low speed lateral impact loading using a software of finite element analysis, examined the effect of the hollow rate on the impacting characteristics, and proposed to evaluate the crashworthiness of a structure by using the robust coefficient, by conducting three sets of tests to adjust the typical cases of finite element simulation. The specimen's crashworthiness was analyzed mainly on the basis of its robustness structural stability in the impacting process. The results show that at a hollow rate of 0-0.6, the hollow rate's influence on the value of the impact platform was not obvious and little change in the specimen's crashworthiness was observed; at a hollow rate above 0.73, the value showed an obvious decrease and the crashworthiness was greatly reduced; at a hollow rate of 0-0.6, the specimen's structural robust coefficient was kept relatively high; and at a hollow rate of 0.6-1.0, the specimen's structural robust coefficient was obviously reduced, exhibiting an tendency of decrease in the impacting process.
- stainless steel /
- impact load /
- concrete filled double steel tube /
- hollow rate

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图 1 构件横截面详情

Figure 1. Dimension of stainless-concrete-steel memb

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图 2 钢材本构模型

Figure 2. Constitutive model of steel

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图 3 构件边界条件与网格属性

Figure 3. Boundary conditions and element division

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图 4 冲击体的几何尺寸

Figure 4. Indenter's shape and dimensions

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图 5 S50试件实验曲线与数值模拟曲线对比

Figure 5. Comparison of S50 specimen's between experimental and simulation curves

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图 6 S76试件实验曲线与数值模拟曲线对比

Figure 6. Comparison of S76 specimen's between experimental and simulation curves

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图 7 S89试件实验曲线与数值模拟曲线对比

Figure 7. Comparison of S89 specimen's between experimental and simulation curves

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图 8 典型算例试件破坏模态实验与模拟对比

Figure 8. Comparison of failure modes' between experiment and simulation in typical specimens

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图 9 不同空心率下的冲击力时程曲线

Figure 9. Histories of impact force at different hollow rates

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图 10 冲击力平台值与空心率关系

Figure 10. Relation between impact platform value and hollow rate

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图 11 不同空心率下的冲击力时程曲线

Figure 11. Histories of impact force at different hollow rates

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图 12 冲击力平台值与空心率关系

Figure 12. Relation between impact platform value and hollow rate

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图 13 不同空心率下试件的稳固性因数

Figure 13. Relation between stability factor and hollow rate

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表 1 试件几何参数

Table 1. Geometric parameters of specimens

试件	截面尺寸		χ	v₀/(m·s^-1)
试件	D_o×t_o	D_i×t_i	χ	v₀/(m·s^-1)
S50	114 mm×2 mm	50 mm×1.8 mm	0.46	7.6
S76	114 mm×2 mm	89 mm×1.6 mm	0.81	9.8
S89	114 mm×2 mm	76 mm×1.6 mm	0.69	11.7

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表 2 试件内外钢管材料的基本力学性能参数

Table 2. Mechanical properties of outer and inner tubes

材料	d/mm	σ_y/MPa	σ_u/MPa	E/GPa	ν	λ/%
不锈钢	2	322.1	702.5	191.3	0.3	46.4
普通钢管	2	274.6	350.5	207.5	0.3	21.8

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