冲击荷载下内衬八边形钢管空心钢筋混凝土柱的动力响应

司强; 王蕊

doi:10.11883/bzycj-2018-0237

冲击荷载下内衬八边形钢管空心钢筋混凝土柱的动力响应

doi: 10.11883/bzycj-2018-0237

司强,
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优秀青年基金（201701D211006）；山西省高等学校科技创新项目（2017130）

详细信息

作者简介:
司　强（1993－　），男，硕士，1096451970@qq.com

通讯作者:
王　蕊（1979－　），女，博士，教授，wangrui@tyut.edu.cn

中图分类号: O383.2; TU375.3
计量
- 文章访问数: 5726
- HTML全文浏览量: 1461
- PDF下载量: 47
- 被引次数: 0
出版历程
- 收稿日期: 2018-07-02
- 修回日期: 2018-10-25
- 刊出日期: 2019-11-01

Dynamic behaviors of a hollow reinforced concrete column with an inner octagon steel tube under lateral impact

SI Qiang,
WANG Rui^,

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

摘要

摘要: 以一种内衬八边形钢管空心钢筋混凝土柱为研究对象，在自主研发的无导轨式大型落锤试验机上，完成了3种不同边界条件、2种不同冲击高度以及2种不同轴压比的侧向冲击实验。研究了不同冲击高度、边界条件和轴压比下试件的破坏形态、冲击力时程曲线和跨中位移时程曲线，并选取一根普通空心钢筋混凝土试件与同条件的内衬钢管空心钢筋混凝土试件进行了对比。结果表明：用内衬钢管替代内置钢筋笼使得构件的抗冲击性能明显优于相应的普通空心钢筋混凝土构件，且在轴压比不超过0.3的范围内，轴压比的改变对冲击结束后本内衬八边形钢管空心钢筋混凝土试件的残余挠度影响不大。
- 内衬钢管 /
- 空心钢筋混凝土 /
- 侧向冲击 /
- 动力响应
Abstract: A kind of hollow reinforced concrete column with inner octagon steel tube is considered as the object of this study. The experiments are carried out using a large drop testing machine which was designed by ourselves. The analysis parameters included the boundary conditions, the impact heights and the axial compression ratios. During the experiments, the time history curves of the impact force and the lateral deformation of specimens were recorded. As well as, the failure forms of specimens were observed after the impact tests. A common hollow reinforced concrete specimen was selected and compared with the hollow reinforced concrete column with inner octagon steel tube under the same conditions. The results show that the impact resistance of the hollow reinforced concrete columns with inner octagon steel tube is obviously better than that of the corresponding hollow reinforced concrete columns by using the inner steel tube instead of the built-in steel cage. Within the range of axial compression ratio not exceeding 0.3, the change of axial compression ratio has little effect on the residual deflection of hollow reinforced concrete columns with inner octagon steel tube after impact.
- inner steel tube /
- hollow reinforced concrete /
- lateral impact /
- dynamic behavior

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图 1 两种试件的剖面图（mm）

Figure 1. Profiles of two specimens (mm)

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图 2 柱子立面和箍筋位置图（mm）

Figure 2. Elevation and stirrup

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图 3 A-A剖面（mm）

Figure 3. A-A profile (mm)

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图 4 落锤冲击试验装置

Figure 4. Drop-weight impact test setup

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图 5 试验装置示意图

Figure 5. Picture of testing setup

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图 6 实验后试件破坏形态

Figure 6. Failure modes of specimens after testing

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图 7 冲击力时程曲线

Figure 7. The time history curves of impact force

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图 8 跨中位移时程曲线

Figure 8. The time history curves of mid-span displacement

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图 9 空心钢筋混凝土柱RA3-5剖面图（mm）

Figure 9. Profile of hollow reinforced concrete column (mm)

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图 10 两种试件破坏形态对比图

Figure 10. Comparison of two kinds of specimen failure

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图 11 两种试件冲击力对比图

Figure 11. Comparison of impact force of two specimens

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图 12 两种试件挠度对比图

Figure 12. Comparison of two kinds of specimen deflection

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表 1 试件材料几何尺寸和性质

Table 1. Geometry and properties of specimens

钢材	型号	屈服强度/MPa	极限强度/MPa	弹性模量/GPa	直径/mm	壁厚/mm
纵筋	HRB400	455.50	641.6	199	15.6	−
箍筋	HRB400	475.38	670.0	202	7.7	−
八边形钢管	Q345	298.00	447.0	206	−	3.91
注：表中的钢筋直径为所购买商品钢筋的直径实测值。

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表 2 落锤参数

Table 2. Parameters of drop-weight

名称	直径/mm	高度/mm	质量/kg
锤体	490	486	719.43
锤头顶部	490	150	221.2
冲击力传感器	300	150	82.9
锤头底部	450	100	124.37

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表 3 试件编号和试验结果

Table 3. The results of specimens

试件编号	轴压比	冲击高度/mm	冲击能量/kJ	冲击力峰值/kN	高度尺所测残余挠度/mm
FF-2	0	2 001	2.25×10⁴	10 527.91	6
FF-5	0	5 000	5.63×10⁴	17 958.78	29
FS-2	0	2 000	2.25×10⁴	15 939.84	3
FS-5	0	5 001	5.63×10⁴	16 439.58	31
SS-2	0	2 000	2.25×10⁴	11 431.50	3
SS-5	0	4 999	5.63×10⁴	16 216.93	39
A2-2	0.2	2 000	2.25×10⁴	9 474.40	2
A2-5	0.2	5 001	5.63×10⁴	20 666.35	28
A3-2	0.3	2 001	2.25×10⁴	9 243.23	2
A3-5	0.3	5 000	5.63×10⁴	34 292.97	28
RA3-5	0.3	5 000	5.63×10⁴	36 846.45	68

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