CFRP-混凝土-钢管组合结构在低速侧向撞击下的动力响应

刘烨; 王蕊; 李志刚

doi:10.11883/bzycj-2016-0349

CFRP-混凝土-钢管组合结构在低速侧向撞击下的动力响应

doi: 10.11883/bzycj-2016-0349

刘烨¹,
王蕊^2, ,,
李志刚¹

1.
太原理工大学力学学院, 山西太原 030024
2.
太原理工大学建筑与土木工程学院, 山西太原 030024

基金项目:

国家自然科学基金项目 51378290

详细信息

作者简介:
刘烨(1990-), 男, 硕士研究生

通讯作者:
王蕊, wangrui@tyut.edu.cn

中图分类号: O383
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- 被引次数: 0
出版历程
- 收稿日期: 2016-11-16
- 修回日期: 2017-02-25
- 刊出日期: 2018-07-25

Finite element analysis of CFRP-concrete-steel composite structure under low velocity lateral impact loading

LIU Ye¹,
WANG Rui^{2
, ,},
LI Zhigang¹

1.
College of Mechanics, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China
2.
College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

摘要

摘要: 采用有限元软件ABAQUS建立了碳纤维增强聚合物（CFRP）-混凝土-钢管组合结构在低速侧向撞击作用下的有限元模型。模型的计算结果与试验结果吻合良好，能够较好地模拟CFRP-混凝土-钢管在侧向撞击下的力学特性。利用该模型，对试件在冲击荷载作用下的动力响应全过程进行分析，采用正交分析法研究了冲击高度、空心率等7种因素对试件冲击力峰值、冲击力平台值和跨中残余挠度的影响。结果表明：冲击高度（冲击能量）是影响冲击力峰值的主要因素；空心率是影响冲击力平台值的主要因素，并且当空心率在0.3~0.7之间时，试件的抗撞击性能随着空心率的提高而逐渐增强；冲击后结构的跨中残余挠度由冲击高度、空心率、CFRP层数、CFRP方向等因素共同影响。
- 碳纤维增强聚合物-混凝土-钢管 /
- 侧向撞击 /
- 有限元分析 /
- 全过程分析 /
- 正交分析
Abstract: In this study, we set up a finite element model for a carbon fiber reinforced polymer (CFRP)-concrete-steel composite structure under low-velocity impact load using ABAQUS. The analytic results from our model were found to agree well with the test results, thus capable of being used to simulate the mechanical performance of the structure. Using this model, we analyzed all the stages of the dynamic response of the specimen under lateral impact load, and investigated the effects of seven factors, such as impact height and hollow ratio, on the peak value and the platform value of the impact force and the mid-span residual deflection, using orthogonal analysis. We found that the impact height (impact energy) is the main factor influencing the peak value of the impact force; the residual deflection is affected by the interaction of the main factors including the impact height, the hollow ratio, the number of CFRP layers and the direction of CFRP; the main factor of the platform value of the impact force is the hollow ratio, and the anti-impact performance of the specimen gradually increases with the increase of the hollow ratio ranging from 0.3 to 0.7.
- carbon fiber reinforced polymer-concrete-steel composite structure /
- lateral impact /
- finite element analysis /
- full-range analysis /
- orthogonal analysis

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图 1 试件和试验装置示意(单位：mm)

Figure 1. Illustration of specimen and test set-up (Unit: mm)

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图 2 试验与模拟变形模态对比

Figure 2. Comparison between test and simulated deformation modes

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图 3 试验与模拟冲击力时程曲线对比

Figure 3. Comparison between test and simulation of impact force time-history

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图 4 试验与模拟跨中挠度时程曲线对比

Figure 4. Comparison between test and simulation of mid-span deflection time-history

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图 5 全过程分析

Figure 5. Full-range analysis

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图 6 各因素对冲击力峰值的影响

Figure 6. Influence of various factors on peak value of impact force

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图 7 各因素对冲击力平台值的影响

Figure 7. Influence of various factors on platform value of impact force

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图 8 各因素对跨中残余挠度的影响

Figure 8. Influence of various factors on mid-span residual deflection

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表 1 试件信息

Table 1. Specimen information

试件	截面尺寸/(mm×mm)		n	h/m	E₀/kJ	F_s			Δ_r
试件	D₀×t₀	D_i×t_i	n	h/m	E₀/kJ	模拟/kN	试验/kN	比值	模拟/mm	试验/mm	比值
F1L	∅114×0.17	∅50×1.8	1	0.25	0.50	23.3	26.8	0.87	17.64	18.28	0.97
F1M	∅114×0.17	∅50×1.8	1	0.50	1.00	23.4	24.0	0.98	38.10	38.34	0.99
F1H	∅114×0.17	∅50×1.8	1	1.00	1.99	23.2	23.8	0.98	79.18	71.57	1.10
F2L	∅114×0.34	∅50×1.8	2	0.25	0.50	24.9	24.3	1.02	16.96	19.11	0.89
F2M	∅114×0.34	∅50×1.8	2	0.50	1.00	26.3	24.7	1.07	33.92	35.75	0.95
F2H	∅114×0.34	∅50×1.8	2	1.00	1.99	27.1	28.4	0.95	71.08	70.88	1.00
F3L	∅114×0.51	∅50×1.8	3	0.25	0.50	26.7	32.3	0.83	17.01	18.77	0.91
F3M	∅114×0.51	∅50×1.8	3	0.50	1.00	29.7	37.0	0.80	32.77	34.75	0.94
F3H	∅114×0.51	∅50×1.8	3	1.00	1.99	30.5	35.7	0.85	64.28	64.56	1.00

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表 2 正交表

Table 2. Orthogonal table

试验	h/m	ψ	n	θ/(°)	f_i/MPa	f_c/MPa	D_i/t_i	F_max/kN	F_s/kN	Δ_r/mm
1	0.25	0.3	1	0	235	30	20	30	25	7.5
2	0.25	0.5	2	45	345	50	40	35	28	15.8
3	0.25	0.7	3	90	420	70	60	45	43	9.1
4	0.50	0.3	1	45	345	70	60	54	12	82.0
5	0.50	0.5	2	90	420	30	20	52	50	15.0
6	0.50	0.7	3	0	235	50	40	51	49	6.1
7	1.00	0.3	2	0	420	50	60	68	63	8.9
8	1.00	0.5	3	45	235	70	20	90	45	40.1
9	1.00	0.7	1	90	345	30	40	53	46	33.2
10	0.25	0.3	3	90	345	50	20	32	24	27.5
11	0.25	0.5	1	0	420	70	40	32	30	46.3
12	0.25	0.7	2	45	235	30	60	33	31	13.4
13	0.50	0.3	2	90	235	70	40	56	17	6.8
14	0.50	0.5	3	0	345	30	60	49	48	6.0
15	0.50	0.7	1	45	420	50	20	100	92	5.5
16	1.00	0.3	3	45	420	30	40	84	21	97.7
17	1.00	0.5	1	90	235	50	60	51	18	100.9
18	1.00	0.7	2	0	345	70	20	86	84	9.0

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表 3 冲击力峰值极差分析结果

Table 3. Range analysis for peak value of impact force

K_i	因素
K_i	h	ψ	n	θ	f_i	f_c	D_i/t_i
K₁	207	324	320	316	311	301	390
K₂	362	309	330	396	309	337	311
K₃	432	368	351	289	381	363	300
R	225	59	31	107	72	62	90

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表 4 冲击力平台值极差分析结果

Table 4. Range analysis for platform value of impact force

K_i	因素
K_i	h	ψ	n	θ	f_i	f_c	D_i/t_i
K₁	181	162	223	299	185	221	320
K₂	268	219	273	229	242	274	191
K₃	277	345	230	198	299	231	215
R	96	183	50	101	114	53	129

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表 5 跨中残余挠度极差分析结果

Table 5. Range analysis for mid-span residual deflection

K_i	因素
K_i	h	ψ	n	θ	f_i	f_c	D_i/t_i
K₁	119.6	230.4	275.4	83.8	174.8	172.8	104.6
K₂	121.4	224.1	130.1	254.5	173.5	244.8	205.9
K₃	289.8	76.3	186.5	192.5	182.5	193.3	220.3
R	170.2	154.1	145.3	170.7	9.0	72.0	115.7

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