高强不锈钢绞线网增强工程水泥基复合材料受拉应力-应变关系

王新玲; 杨广华; 钱文文; 李可; 朱俊涛

doi:10.13801/j.cnki.fhclxb.20200428.002

高强不锈钢绞线网增强工程水泥基复合材料受拉应力-应变关系

doi: 10.13801/j.cnki.fhclxb.20200428.002

王新玲^1,,
杨广华^1,,
钱文文^2,,
李可^1,,
朱俊涛^1, ,

1.
郑州大学　土木工程学院，郑州 450001
2.
成都基准方中建筑设计有限公司郑州分公司，郑州 450003

基金项目: 国家自然科学基金(51879243；51708511)；国家重点研发计划项目(2017YFC1501204)；国家自然科学基金-联合基金(U1804137)；河南省自然科学基金(182300410210)；住房和城乡建设部科学技术计划项目(2019-K-059)

详细信息

通讯作者:
朱俊涛，博士，副教授，研究方向为新型建筑复合材料性能及结构应用　E-mail：juntaozhu@zzu.edu.cn

中图分类号: TU528.58
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- 文章访问数: 1528
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- 被引次数: 0
出版历程
- 收稿日期: 2020-03-09
- 录用日期: 2020-04-21
- 网络出版日期: 2020-04-28
- 刊出日期: 2020-12-15

Tensile stress-strain relationship of engineered cementitious composites reinforced by high-strength stainless steel wire mesh

WANG Xinling^1
,,
YANG Guanghua^1
,,
QIAN Wenwen^2
,,
LI Ke^1
,,
ZHU Juntao^{1
, ,}

1.
School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China
2.
JZFZ Architectural Design Co. Ltd., Zhengzhou Branch, Zhengzhou 450003, China

摘要

摘要: 为了研究高强不锈钢绞线网增强工程水泥基复合材料(Engineered cementitious composites，EEC)的受拉性能，考虑高强不锈钢绞线配筋率、ECC抗拉强度、高强不锈钢绞线网增强ECC试件宽度3个影响因素，对设计的27个高强不锈钢绞线网增强ECC试件进行了单轴拉伸试验。试验结果表明，高强不锈钢绞线网增强ECC受拉试件的开裂应力和极限应力随着钢绞线配筋率、ECC抗拉强度的增大而增大；增大试件宽度对试件的开裂应力和极限应力几乎无影响。基于试验结果，提出并建立了高强不锈钢绞线网增强ECC受拉本构模型，推导了开裂应力和极限应力计算公式。经验证，计算结果与试验结果吻合良好，说明所建立的受拉本构模型可准确描述高强不锈钢绞线网增强ECC的受拉应力-应变关系。
- 高强不锈钢绞线网增强工程水泥基复合材料 /
- 应力-应变关系 /
- 本构模型 /
- 拉伸性能 /
- 试验
Abstract: In order to study the tensile performance of the engineered cementitious composites (EEC) reinforced by high high-strength stainless steel wire mesh, the parameters of reinforcement ratio of high-strength stainless steel stranded wire, tensile strength of ECC and width of ECC reinforced by high high-strength stainless steel wire mesh specimen were considered, and the uniaxial tensile tests of total of 27 test pieces were carried out. The test results show that the cracking stress and ultimate stress of the specimens increase with the increase of the steel strand reinforcement ratio and ECC tensile strength. The crack stress and ultimate stress of the specimens are almost not affected by increasing the width of the specimen. Based on the test results, the tensile constitutive model of high-strength stainless steel stranded wire mesh reinforced ECC and the formulas for calculating the cracking stress and ultimate stress were proposed. It is proved that the calculated results are in good agreement with the experimental results, which indicates that the established tensile constitutive model can accurately describe the tensile stress-strain relationship of ECC reinforced by high-strength stainless steel wire mesh.
- high-strength stainless steel stranded wire mesh reinforced engineered cementitious composites /
- stress-strain relationship /
- constitutive model /
- tensile performance /
- experiment

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图 1 高强不锈钢绞线网增强ECC试件设计详图(虚线表示钢绞线)

Figure 1. Design details of ECC reinforced by high-strength stainless steel wire mesh specimens (Dotted line indicates steel strand)

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图 2 高强不锈钢绞线应力-应变曲线

Figure 2. Stress-strain curves of high-strength stainless steel strand

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图 3 高强不锈钢绞线网增强ECC试件受拉破坏过程

Figure 3. Tensile failure process of ECC reinforced by high-strength stainless steel wire mesh specimens

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图 4 高强不锈钢绞线网增强ECC试件受拉应力-应变曲线

Figure 4. Tensile stress-strain curves of ECC reinforced by high-strength stainless steel wire mesh specimens

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图 5 高强不锈钢绞线网增强ECC受拉应力-应变曲线模型

Figure 5. Tensile stress-strain curve model of ECC reinforced by high-strength stainless steel wire mesh

下载: 全尺寸图片幻灯片

图 6 高强不锈钢绞线网增强ECC受拉本构模型验证

Figure 6. Verification of tensile constitutive model of ECC reinforced by high-strength stainless steel wire mesh

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表 1 高强不锈钢绞线网增强工程水泥基复合材料(ECC)试件参数

Table 1. Parameters of engineered cementitious composites(ECC) reinforced by high-strength stainless steel wire mesh specimens

Group number	Test section width b_c /mm	Steel strand spacing/mm	Reinforcement ratio of steel strand
TC12	80	50	0.0028
TC22	70	40	0.0032
TC32	60	30	0.0037
TC42	50	20	0.0048
TC52	90	30	0.0037
TD12	80	50	0.0028
TD22	70	40	0.0032
TD32	60	30	0.0037
TD42	50	20	0.0048

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表 2 ECC受拉试验结果

Table 2. Tensile test results of ECC

Group number	Tensile strength/MPa	Ultimate tensile strain	Cracking stress/MPa	Cracking strain
TC12	3.53	0.0179	2.45	0.000204
TC22	3.53	0.0179	2.45	0.000204
TC32	3.53	0.0179	2.45	0.000204
TC42	3.53	0.0179	2.45	0.000204
TC52	3.53	0.0179	2.45	0.000204
TD12	3.46	0.0297	2.39	0.000189
TD22	3.46	0.0297	2.39	0.000189
TD32	3.46	0.0297	2.39	0.000189
TD42	3.46	0.0297	2.39	0.000189

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表 3 高强不锈钢绞线网增强ECC试件拉伸试验结果

Table 3. Tensile test results of ECC reinforced by high-strength stainless steel wire mesh specimens

Group number	Cracking stress/MPa	Cracking strain	Ultimate tensile stress/MPa	Ultimate tensile strain	Elastic modulus/MPa
TC12	2.20	0.000156	7.09	0.030874	14 471
TC22	2.25	0.000162	7.94	0.034056	14 122
TC32	2.41	0.000171	8.77	0.030581	14 492
TC42	2.56	0.000182	10.65	0.034815	14 578
TC52	2.54	0.000181	8.82	0.033683	14 642
TD12	1.97	0.000145	6.41	0.031929	14 216
TD22	1.99	0.000149	7.81	0.043660	14 727
TD32	2.07	0.000139	8.62	0.041116	14 460
TD42	2.19	0.000159	10.30	0.035051	14 496

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表 4 高强不锈钢绞线应力发挥系数γ取值

Table 4. Value of stress development coefficient γ of high-strength stainless steel strand

Group number	γ	R²
TC12	0.73	0.9267
TC22	0.72	0.9459
TC32	0.76	0.9607
TD12	0.71	0.9157
TD22	0.72	0.9755
TD32	0.71	0.9325

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表 5 试验与式(6)计算得到的高强不锈钢绞线网增强ECC试件开裂应力和极限应力的对比

Table 5. Comparison of cracking stress and ultimate tensile stress of ECC reinforced by high-strength stainless steel wire mesh specimens obtained by test and equation (6)

Group number	Cracking stress/MPa			Ultimate tensile stress/MPa
Group number	T	C	R	T	C	R
TC12	2.20	2.26	0.97	7.09	6.79	1.04
TC22	2.25	2.27	0.99	7.94	7.25	1.10
TC32	2.41	2.28	1.06	8.77	7.87	1.11
TC42	2.56	2.30	1.11	10.65	9.19	1.16
TC52	2.54	2.28	1.11	8.82	7.87	1.12
TD12	1.97	1.94	1.01	6.41	6.58	0.97
TD22	1.99	1.95	1.02	7.81	7.03	1.11
TD32	2.07	1.96	1.06	8.62	7.63	1.13
TD42	2.19	1.98	1.11	10.30	8.90	1.16
Notes: T—Test value; C—Calculated value; R—T/C.

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