侧向撞击荷载作用下内八边形空心钢筋混凝土柱的动力响应

陈亮廷; 王蕊

doi:10.11883/bzycj-2018-0119

侧向撞击荷载作用下内八边形空心钢筋混凝土柱的动力响应

doi: 10.11883/bzycj-2018-0119

陈亮廷,
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））；山西省高等学校科技创新项目（2017130）

详细信息

作者简介:
陈亮廷（1992－　），男，硕士研究生，2814365559@qq.com

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

中图分类号: O389; TU375.3
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- 被引次数: 0
出版历程
- 收稿日期: 2018-04-11
- 修回日期: 2018-09-17
- 网络出版日期: 2019-06-25
- 刊出日期: 2019-07-01

Dynamic response of inner octagonal hollow reinforced concrete columns under lateral impact loading

CHEN Liangting,
WANG Rui^,

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

摘要

摘要: 相比于实心钢筋混凝土柱，空心钢筋混凝土柱具有自重轻和截面扩展好等优点，被广泛地用作桥墩，由此其不可避免地会受到船舶的撞击。本文中进行6根内八边形空心钢筋混凝土柱和4根内衬八边形钢管空心钢筋混凝土柱的动力响应的实验。在实验中记录了构件破坏形态、撞击力时程曲线和跨中位移时程曲线，并从撞击高度、边界条件和钢板厚度等方面分析了构件的耐撞性能。结果表明：内八边形钢筋混凝土柱和内衬八边形钢管空心钢筋混凝土柱在撞击荷载作用下的破坏形态主要分为两种破坏类型，分别为局部型破坏和整体型破坏；撞击高度越大构件破坏越严重；两端固定对构件的耐撞击性能有提升作用；钢管厚度对构件的耐撞击性能有较明显的提升作用。
- 空心钢筋混凝土柱 /
- 动力响应 /
- 耐撞性能 /
- 破坏形态
Abstract: By comparing with their solid reinforced concrete columns counterparts, the inner hollow reinforced concrete columns are widely used as piers because of their advantages including light weight and good section extension. These piers will inevitably be hit by ships. In this paper, dynamic response experiments of six inner octagonal hollow reinforced concrete columns with and without steel tube are carried out. The failure mode, the impact force- versus-time curves and trans-middle displacement-versus-time curves were recorded. The impact resistance of the component is obtained by analysis of the impact height, the condition of the boundary and the thickness of the steel tube The experimental results show that failure modes of inner octagonal hollow reinforced concrete columns under lateral impact load can be divided into two categories: local failure (type I) and global failure (type II). As the height of impact increases, the damage seriousness of the component increases. Fixing two endings of the component can improve its impact resistance. The thickness of the steel tube has an obvious effect on the impact resistance of the component.
- inner octagonal hollow reinforced concrete columns /
- dynamic response /
- impact resistance /
- failure mode

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图 1 空心混凝土柱

Figure 1. Hollow concrete

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图 2 落锤冲击试验装置

Figure 2. Drop-weight impact test setup

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图 3 试验装置示意图

Figure 3. Schematic illustration of testing setup

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图 4 内八边形空心钢筋混凝土柱

Figure 4. Inner octagonal hollow reinforced concrete column

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图 5 内衬八边形钢管空心钢筋混凝土柱

Figure 5. Inner octagonal hollow steel tube reinforced concrete column

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图 6 试验后构件破坏形态

Figure 6. Failure mode of tested specimens

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图 7 构件破坏简化图

Figure 7. Illustration of the failure of specimen

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图 8 撞击力时程曲线

Figure 8. Force versus time curves in impacts

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图 9 跨中位移时程曲线

Figure 9. Trans-middle displacement versus time curves

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图 10 冲击能量对位移的影响

Figure 10. Influence of impact energy on displacement

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表 1 落锤参数

Table 1. 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	221.20
冲击力传感器	300	150	82.90
锤头底部	450	100	124.37

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表 2 试件材料几何尺寸和性质

Table 2. Specimen geometry and material properties

名称	直径/mm	屈服强度/MPa	极限强度/MPa	壁厚/mm
钢管	−	304.0	457.0	2.00
钢管	−	304.0	457.0	3.91
纵筋	15.6	455.5	641.6	−
箍筋	7.7	475.3	670.0	−

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表 3 试件编号和试验结果

Table 3. Experimental results

试件编号	冲击高度/mm	冲击能量/J	力峰值/MN	残余挠度/mm	跨中底部实验前高度/mm	跨中底部实验后高度/mm
FF-2	2 000	2.25×10⁴	25.56	9	400	391
FF-5	5 001	5.63×10⁴	67.00	40	398	358
FS-2	2 000	2.25×10⁴	12.69	6	398	392
FS-5	4 999	5.63×10⁴	17.82	50	394	347
SS-2	2 001	2.25×10⁴	12.33	11	400	389
SS-5	5 002	5.63×10⁴	31.67	52	397	345
TFF-2	2 001	2.25×10⁴	10.53	6	398	392
TFF-5	5 000	5.63×10⁴	16.46	29	397	368
RSS-2	2 001	2.25×10⁴	13.06	7	397	390
RSS-5	5 000	5.63×10⁴	29.61	37	397	360
注：FF、FS、SS 分别代表两端固定、一端固定一端简支以及两端简支；数字 2 和 5 分别表示撞击高度（H）为 2 m 和 5 m；T 和 R 分别表示钢管厚度（T）为 3.91 mm 和 2 mm；FS5 表示试件一端固定一端简支，冲击高度为 5 m 的工况；TFF5 表示两端固支，钢管厚度为 3.91 mm，冲击高度为 5 m 的工况。

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