聚乙烯醇纤维增强水泥复合材料板的冲切性能

李安令; 张朝辉; 郭帅成; 朱德举

doi:10.13801/j.cnki.fhclxb.20200616.001

聚乙烯醇纤维增强水泥复合材料板的冲切性能

doi: 10.13801/j.cnki.fhclxb.20200616.001

1.
湖南大学　土木工程学院　绿色先进土木工程材料及应用技术湖南省重点实验室，长沙 410082
2.
上海城建市政工程(集团)有限公司，上海 200331

基金项目: 国家自然科学基金(51778220；U1806225)；长沙市科学计划项目(KQ1907115)；湖南省研究生科研创新项目(CX2016B109)

详细信息

通讯作者:
朱德举，博士，教授，博士生导师，研究方向为生物材料多尺度力学行为及仿生、高性能纤维/织物增强水泥基和树脂基复合材料、防弹高性能纤维布的力学特性和有限元分析、冲击和高应变率试验技术　 E-mail：dzhu@hnu.edu.cn

中图分类号: TB332; TU528.572
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出版历程
- 收稿日期: 2020-05-08
- 录用日期: 2020-06-04
- 网络出版日期: 2020-06-16
- 刊出日期: 2021-03-15

Punching performance of polyvinyl alcohol fiber reinforced cementitious composite slab

1.
Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province, College of Civil Engineering, Hunan University, Changsha 410082, China
2.
Shanghai Urban Construction Municipal Engineering (Group) Co. Ltd., Shanghai 200331, China

摘要

摘要: 利用MTS试验机对聚乙烯醇纤维(PVA)/水泥复合材料板进行准静态冲切试验，研究了不同PVA纤维掺量对其破坏形态和承载力的影响。结果表明：掺入PVA纤维能够将水泥基板的破坏形态由脆性破坏转为延性破坏。PVA/水泥复合材料板的冲切极限荷载和耗能能力均随PVA纤维掺量增加而增大，其中耗能能力的增大更显著。进一步采用Instron 落锤冲击系统对PVA纤维体积分数为2vol%的PVA/水泥复合材料板进行动力冲切试验，研究冲切速度(2.0~4.2 m/s)对PVA/水泥复合材料板的破坏形态、初裂荷载、极限荷载、初始刚度及耗能性能的影响。结果表明：与准静态试验相比，冲切荷载作用下PVA/水泥复合材料板的极限荷载增大，而耗能减少；此外相对初裂荷载和耗能，极限荷载的冲切速度相关性最显著。基于上述结果，构建了纤维增强水泥复合材料四线型拉伸本构模型，并通过反算模型和塑性铰线方法对纤维增强水泥复合材料板的冲切力学性能进行模拟，并得到材料的本构参数。本研究可以为PVA/水泥复合材料的抗冲切设计提供技术支撑。
- 纤维增强水泥复合材料 /
- 聚乙烯醇(PVA)纤维 /
- 冲击载荷 /
- 应力-应变响应 /
- 塑性铰
Abstract: A quasi-static punching test was conducted on polyvinyl alcohol (PVA) fiber/cementitious composite slab by using MTS testing machine. The effects of the PVA fiber content on the failure mode and bearing capacity of PVA/cementitious composite slab were studied based on the experimental results. The results show that incorporating of PVA fiber can change the failure mode of the PVA/cementitious composite slab from brittle failure to ductile failure. And both the punching capacity and the energy absorption capacity of the PVA/cementitious composite slab increase with the fiber content and more obvious rise can be observed for the energy absorption capacity. Then the dynamic punching test of PVA reinforced cementitious composite slab with 2vol% volume fraction of PVA was carried out by using Instron drop-weight impact system. The influences of the impact velocity (2.0–4.2 m/s) on the failure mode, cracking impact loading, ultimate impact loading, initial stiffness and energy absorption capacity of the PVA/cementitious composite slab were investigated. The results show that compared with the results from the quasi-static test, the ultimate loading of the PVA/cementitious composite slab increases while the energy absorption capacity decreases under the punching force. Also, a more significant increase in ultimate loading with the loading velocity can be observed, compared with that of the energy absorption capacity. A qua-linear tensile constitutive model of fiber reinforced cementitious composite was constructed based on these experimental results, and the punching mechanic behavior of the fiber reinforced cementitious composite slab was simulated by the back-calculation model based on the plastic hinge method, and the material parameters of the fiber reinforced cementitious composite were obtained. This study can provide a solid base for the punch performance design of the PVA/cementitious composite slab.
- fiber reinforced cementitious composite /
- polyvinyl alcohol (PVA) fibers /
- impact loading /
- stress-strain response /
- plastic hinge

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图 1 静态及低速冲击试验装置及安装

Figure 1. Test instruments and set up for static and low-velocity impact tests

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图 2 不同PVA/水泥复合材料试件的典型破坏形态

Figure 2. Typical failure modes of different PVA/cementitious composite specimens

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图 3 不同PVA纤维掺量的PVA/水泥复合材料板的荷载-位移曲线

Figure 3. Load-displacement curves of PVA/cementitious composite slabs with different PVA fiber contents

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图 4 不同冲击速度时PVA纤维体积掺量为2vol%的PVA/水泥复合材料板的冲击力-位移曲线

Figure 4. Impact loading-displacement curves of PVA/cementitious composite slabs with PVA fiber content of 2vol% under different punching velocities

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图 5 PVA纤维掺量对PVA/水泥复合材料板力学性能的影响

Figure 5. Influences of fiber content on mechanical properties of PVA/cementitious composite slabs

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图 6 冲击速度对PVA/水泥复合材料板力学性能的影响

Figure 6. Effects of impact velocity on mechanical properties of PVA/cementitious composite slabs

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图 7 PVA/水泥复合材料板归一化冲击力${F_{\rm{d}}}$、位移$\delta $、冲击速度V和能量耗散E_n时程曲线

Figure 7. Time history curves of normalized impact loading ${F_{\rm{d}}}$, displacement $\delta $, velocity V and energy dissipation E_n of PVA/cementitious composite slabs

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图 8 纤维增强水泥复合材料本构模型

Figure 8. Constitutive model for fiber reinforced cementitious composite

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图 9 纤维增强水泥复合材料荷载-挠度响应求解流程^[24]

Figure 9. Flow chart for solution of load-deflection responses of fiber reinforced cementitious composite^[24]

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图 10 PVA/水泥复合材料板基于拉伸本构模型的测试结果与模拟结果对比

Figure 10. Comparison between measured data and simulated results of PVA/cementitious composite slabs based on tensile constitutive model

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表 1 聚乙烯醇(PVA)纤维性能指标

Table 1. Properties of polyvinyl alcohol (PVA) fiber

Length/mm	Diameter/μm	Tensile strength/MPa	Elastic modulus/GPa	Elongation rate/%	Density/(g·cm⁻³)
12	22	1620	42.8	7	1.3

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表 2 PVA/水泥复合材料基体配比

Table 2. Mix ratio of PVA/cementitious composite

Cement	Sand	Water	Fly ash	Sika Viscocrete 3300
1	1	0.35	0.15	0.009

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表 3 PVA/水泥复合材料试件分组情况

Table 3. Groups of PVA/cementitious composite specimens

Group ID	No. of replicate	Test method	Loading speed/(m·s⁻¹)	Fiber volume fraction/vol%
SS0	3	Static	4.16×10⁻⁴	0
SS10	3	Static	4.16×10⁻⁴	1
SS15	3	Static	4.16×10⁻⁴	1.5
SS20	3	Static	4.16×10⁻⁴	2
DS20	1	Impact	2	2
DS28	1	Impact	2.8	2
DS34	2	Impact	3.4	2
DS42	2	Impact	4.2	2

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表 4 PVA/水泥复合材料试件的模型参数

Table 4. Model parameters for PVA/cementitious composite specimens

Specimen	E/GPa	ε_cr/με	σ_cr/MPa	α₁	α₂	ω	η₁	η₂	η₃	β_tu
SS10	30	100	3.00	15.0	100.0	13	0.019	−0.014	−0.0030	300
SS15	30	100	3.00	18.0	180.0	13	0.022	−0.006	−0.0020	500
SS20	30	100	3.00	20.0	200.0	13	0.024	−0.006	−0.0015	650
DS20	33	120	3.96	5.0	22.0	13	0.500	−0.015	−0.0010	200
DS28	33	120	3.96	5.5	26.5	13	0.700	−0.170	−0.0010	400
DS34	33	120	3.96	8.0	30.0	13	0.580	−0.201	−0.0020	400
DS42	33	120	3.96	8.0	30.0	13	0.580	−0.190	−0.0020	450

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参考文献(24)

[1]	PAKRAVAN H R, JAMSHIDI M, LATIFI M. Study on fiber hybridization effect of engineered cementitious composites with low- and high-modulus polymeric fibers[J]. Construction and Building Materials,2016,112:739-746. doi: 10.1016/j.conbuildmat.2016.02.112
[2]	JEWELL R B, MAHBOUB K C, ROBL T L, et al. Interfacial bond between reinforcing fibers and calcium sulfoaluminate cements: Fiber pullout characteristics[J]. ACI Materials Journal,2015,112(1):39-48.
[3]	LI V C, LEUNG C K Y. Steady-state and multiple cracking of short random fiber composites[J]. Journal of Engineering Mechanics,1992,118(11):2246-2264. doi: 10.1061/(ASCE)0733-9399(1992)118:11(2246)
[4]	LI V C. On engineered cementitious composites (ECC)[J]. Journal of Advanced Concrete Technology,2003,1(3):215-230. doi: 10.3151/jact.1.215
[5]	OLIVEIRA A M D, SILVA F D A, FAIRBAIRN E D M R, et al. Coupled temperature and moisture effects on the tensile behavior of strain hardening cementitious composites (SHCC) reinforced with PVA fibers[J]. Materials and Structures,2018,51(3):65-77. doi: 10.1617/s11527-018-1192-1
[6]	MENG D, HUANG T, ZHANG Y X, et al. Mechanical behaviour of a polyvinyl alcohol fibre reinforced engineered cementitious composite (PVA-ECC) using local ingredients[J]. Construction and Building Materials,2017,141:259-270. doi: 10.1016/j.conbuildmat.2017.02.158
[7]	MECHTCHERINE V, SILVA F D A, MÜLLER S, et al. Coupled strain rate and temperature effects on the tensile behavior of strain-hardening cement-based composites (SHCC) with PVA fibers[J]. Cement and Concrete Research,2012,42(11):1417-1427. doi: 10.1016/j.cemconres.2012.08.011
[8]	QI B, KONG Q, QIAN H, et al. Study of impact damage in PVA-ECC beam under low-velocity impact loading using piezoceramic transducers and PVDF thin-film transducers[J]. Sensors,2018,18(2):671-687.
[9]	YANG E H, LI V C. Tailoring engineered cementitious composites for impact resistance[J]. Cement and Concrete Research,2012,42(8):1066-1071. doi: 10.1016/j.cemconres.2012.04.006
[10]	YANG E H, LI V C. Strain-rate effects on the tensile behavior of strain-hardening cementitious composites[J]. Construction and Building Materials,2014,52:96-104. doi: 10.1016/j.conbuildmat.2013.11.013
[11]	MAALEJ M, QUEK S, ZHANG J. Behavior of hybrid-fiber engineered cementitious composites subjected to dynamic tensile loading and projectile impact[J]. Journal of Materials in Civil Engineering,2005,17(2):143-152. doi: 10.1061/(ASCE)0899-1561(2005)17:2(143)
[12]	SORANAKOM C, MOBASHER B. Closed-form solutions for flexural response of fiber-reinforced concrete beams[J]. Journal of Engineering Mechanics,2007,133(8):933-941. doi: 10.1061/(ASCE)0733-9399(2007)133:8(933)
[13]	SORANAKOM C, MOBASHER B. Flexural design of fiber-reinforced concrete[J]. Materials Journal,2009,106(5):461-469.
[14]	YAO Y, WANG X, ASWANI K, et al. Analytical procedures for design of strain softening and hardening cement composites[J]. International Journal of Advances in Engineering Sciences and Applied Mathematics,2017,9(3):181-194. doi: 10.1007/s12572-017-0187-4
[15]	SORANAKOM C, MOBASHER B. Correlation of tensile and flexural responses of strain softening and strain hardening cement composites[J]. Cement and Concrete Composites,2008,30(6):465-477. doi: 10.1016/j.cemconcomp.2008.01.007
[16]	朱德举, 欧云福. 标距和应变率对Kevlar 49单束拉伸力学性能的影响[J]. 复合材料学报, 2016, 33(2):225-233. ZHU Deju, OU Yunfu. Effects of gauge length and strain rate on tensile mechanical properties of Kevlar 49 single yarn[J]. Acta Materiae Compositae Sinica,2016,33(2):225-233(in Chinese).
[17]	QU H, LI A, HUO J, et al. Dynamic performance of collar plate reinforced tubular T-joint with precompression chord[J]. Engineering Structures,2017,141:555-570. doi: 10.1016/j.engstruct.2017.03.037
[18]	HAN L H, HOU C C, LIU X L, et al. Behaviour of high-strength concrete filled steel tubes under transverse impact loading[J]. Journal of Constructional Steel Research,2014,92:25-39. doi: 10.1016/j.jcsr.2013.09.003
[19]	AGHDAMY S, THAMBIRATNAM D P, DHANASEKAR M. Experimental investigation on lateral impact response of concrete-filled double-skin tube columns using horizontal-impact-testing system[J]. Experimental Mechanics,2016,56(7):1133-1153. doi: 10.1007/s11340-016-0156-z
[20]	International Organization for Standardization. Plastics: determination of charpy impact properties Part 2: Instrumented impact test: ISO 179—2∶2020[S]. Switzerland: International Organization for Standardization, 2020.
[21]	ZHAO W, GUO Q. Experimental study on impact and post-impact behavior of steel-concrete composite panels[J]. Thin-Walled Structures,2018,130:405-413. doi: 10.1016/j.tws.2018.06.012
[22]	YOUSUF M, UY B, TAO Z, et al. Impact behaviour of pre-compressed hollow and concrete filled mild and stainless steel columns[J]. Journal of Constructional Steel Research,2014,96:54-68. doi: 10.1016/j.jcsr.2013.12.009
[23]	NILSON A H, DARWIN D, DOLAN C W. Design of concrete structures[M]. McGraw-Hill Education, 2015.
[24]	ASWANI K. Design procedures for strain hardening cement composites (SHCC) and measurement of their shear properties by mechanical and 2-D digital image correlation (DIC) method[D]. Arizona: Arizona State University, 2014.