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结构应用中应变硬化水泥基复合材料的性能评估

Performance Review of Strain-Hardening Cementitious Composites in Structural Applications.

作者信息

Xue Bingshuang, Xu Binbin, Lu Weihua, Zhang Yongxing

机构信息

School of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China.

No.3 Engineering Company Ltd. of CCCC First Harbor Engineering Company, Dalian 116011, China.

出版信息

Materials (Basel). 2023 Aug 4;16(15):5474. doi: 10.3390/ma16155474.

DOI:10.3390/ma16155474
PMID:37570180
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10420239/
Abstract

Strain-hardening cementitious composites (SHCC) are an attractive construction material with obvious advantages of large strain capacity and high strength, as well as excellent workability and easy processing using conventional equipment. Moreover, SHCC can be designed with varied mix proportions in order to satisfy various requirements and expectations to overcome the shortages of existing construction materials. However, the behavior of SHCC in the structural application is varied from that of SHCC material, which is reviewed and presented in this paper, focusing on the flexural and shear behavior of the SHCC member and the SHCC layer used for strengthening reinforced concrete (RC). The reviewed results demonstrate that both the zero-span tensile behavior of the stress concentration and the uniaxial tensile behavior of the bending effect can influence the crack propagation patterns of multiple fine cracks in the SHCC strengthening layer, in which the crack distribution within the SHCC layer is limited near the existing crack in the RC substrate member in the zero-span tensile behavior. Moreover, the crack propagation patterns of the SHCC strengthening layer are changed with varied layer thicknesses, and the SHCC strengthening layer, even with a small thickness, can significantly increase the shear load carrying capacity of the shear strengthened RC member. This work provides the foundations for promoting SHCC material in the structural application of repairing or retrofitting concrete structures.

摘要

应变硬化水泥基复合材料（SHCC）是一种具有吸引力的建筑材料，具有大应变能力和高强度的明显优势，以及优异的工作性能，并且使用传统设备易于加工。此外，可以设计不同配合比的SHCC，以满足各种要求和期望，克服现有建筑材料的不足。然而，SHCC在结构应用中的性能与SHCC材料的性能不同，本文对此进行了综述和介绍，重点关注SHCC构件以及用于加固钢筋混凝土（RC）的SHCC层的弯曲和剪切性能。综述结果表明，应力集中的零跨度拉伸性能和弯曲效应的单轴拉伸性能都会影响SHCC加固层中多条细裂缝的扩展模式，其中在零跨度拉伸性能下，SHCC层内的裂缝分布在RC基体构件中的现有裂缝附近受到限制。此外，SHCC加固层的裂缝扩展模式会随着层厚的变化而改变，并且即使厚度较小的SHCC加固层也能显著提高剪切加固RC构件的抗剪承载力。这项工作为在混凝土结构修复或加固的结构应用中推广SHCC材料奠定了基础。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/7023dce699c4/materials-16-05474-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/e8b8511fc6cc/materials-16-05474-g001.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/07689cac5e18/materials-16-05474-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/5004ffb96e02/materials-16-05474-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/b19b2b18e273/materials-16-05474-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/bf81c5b218ec/materials-16-05474-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/16e76f446ac3/materials-16-05474-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/7023dce699c4/materials-16-05474-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/e8b8511fc6cc/materials-16-05474-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/26b5f77783eb/materials-16-05474-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/a5e0230a0392/materials-16-05474-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/07689cac5e18/materials-16-05474-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/5004ffb96e02/materials-16-05474-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/b19b2b18e273/materials-16-05474-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/bf81c5b218ec/materials-16-05474-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/16e76f446ac3/materials-16-05474-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/093f/10420239/7023dce699c4/materials-16-05474-g009.jpg

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本文引用的文献

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Materials (Basel). 2021 May 25;14(11):2821. doi: 10.3390/ma14112821.
2
Effect of Graphene Oxide on Mechanical Properties and Durability of Ultra-High-Performance Concrete Prepared from Recycled Sand.氧化石墨烯对由再生砂制备的超高性能混凝土力学性能和耐久性的影响。
Nanomaterials (Basel). 2020 Aug 30;10(9):1718. doi: 10.3390/nano10091718.
3
Mechanical Behavior of Printed Strain Hardening Cementitious Composites.印刷应变硬化水泥基复合材料的力学行为
Materials (Basel). 2020 May 14;13(10):2253. doi: 10.3390/ma13102253.
4
Research on Bonding and Shrinkage Properties of SHCC-Repaired Concrete Beams.基于应变硬化水泥基复合材料（SHCC）修复混凝土梁的粘结与收缩性能研究
Materials (Basel). 2020 Apr 9;13(7):1757. doi: 10.3390/ma13071757.