应变硬化水泥基复合材料动力学性能研究现状与进展  

Review of Dynamic Mechanical Property of Strain-Hardening Cementitious Composite

作　　者：郭伟娜 张鹏[1,2] 鲍玖文[1] 孙治国 田玉鹏 赵凯月 赵铁军 GUO Weina;ZHANG Peng;BAO Jiuwen;SUN Zhiguo;TIAN Yupeng;ZHAO Kaiyue;ZHAO Tiejun(College of Civil Engineering,Qingdao University of Technology,Qingdao 266033,China;Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone,Qingdao University of Technology,Qingdao 266033,China;School of Civil Engineering,Institute of Disaster Prevention,Beijing 101601,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266033 [2]青岛理工大学,山东省蓝色经济区工程建设与安全协同创新中心,青岛266033 [3]防灾科技学院土木工程学院,北京101601

出　　处：《材料导报》2021年第17期17199-17209,共11页Materials Reports

基　　金：国家自然科学基金(U1706222,51922052,51778309);山东省自然科学基金(ZR2018JL018);清华大学水沙科学与水利水电工程国家重点实验室开放基金项目(SKLHSE-2019-C-04)。

摘　　要：应变硬化水泥基复合材料(Strain-hardening cementitious composites,SHCC)作为一种高延性水泥基复合材料在结构修复和改造、加固无筋砌体墙、加固钢筋混凝土梁和防冲击或防爆板等方面具有广阔的应用前景。对SHCC的动力学性能进行详细研究有利于其在抗冲击或抗爆结构中的广泛应用。针对不同基质组成、纤维类型的SHCC静力学性能的理论分析和试验研究已经相对完善,然而对于SHCC动力学性能的研究主要集中在不同应变率、纤维类型及基质组成等对其动力学性能的影响。但针对高、超高应变率和围压等因素作用下的动力学性能研究尚未形成统一认识,同时也未明确得到SHCC动力学性能具体发展机理。近期研究结果表明:SHCC具有明显的应变率效应。在动态加载下,SHCC的应力和断裂能随着应变率的提高而提高,而其应变则相反。更深一步的研究表明,通过在SHCC中掺加粉煤灰等废料来改善纤维与基质之间的粘结可以明显提高其冲击能量耗散能力。本文系统地总结了国内外相关研究学者对SHCC动力学性能的研究现状,综述了SHCC动力学试验设备的原理、组成、优缺点及施加的应变率范围,同时进一步阐述了不同动力学试验设备在SHCC动力学性能研究方面的应用;然后对SHCC动态拉伸、压缩及侵彻性能进行归纳,全面揭示了应变率、纤维类型及基质组成对SHCC动力学性能发展的影响规律;最后,探讨了SHCC动力学性能研究领域所面临的问题,意在为日后SHCC动力学性能的理论分析和试验研究提供一定的建议和方向。Strain-hardening cementitious composites(SHCC)is generally accepted as high ductile cementitious composites.It shows superiority in practical applications including structure repair and modification,strengthening unreinforced masonry wall and reinforced concrete beams,etc.A detailed study on the dynamic properties of SHCC is beneficial to its wide application in anti-impact or anti-blast structures.The theoretical analysis and experimental research regarding the static properties of SHCC with various matrix and fiber types had acquired fruitful results.The research on its dynamic properties mainly considers the effect such as strain rate,fiber type and matrix composition.However,there still lacks comprehensive understanding on the dynamic performance of SHCC when taking factors of high,ultra-high strain rate,confinements into consideration.The recent research results indicate that SHCC exhibits manifest strain rate effect.Its stress and fracture energy as the strain rate increase when dynamic loading was applied.Further research shows that the impact energy dissipation capacity of SHCC can be significantly improved by adding fly ash and other wastes to improve the adhesion between fiber and matrix.This paper systematically summarizes the research status of SHCC dynamic performance by domestic and foreign scholars and reviews the principle,composition,advantages and disadvantages of SHCC test equipment.At the same time,the application of different dynamic test equipment in the research of SHCC dynamic performance is further elaborated.Then the dynamic tensile,compression and penetration properties of SHCC are summarized,and the influence of strain rate,fiber type and matrix composition on the development of SHCC dynamic performance research are discussed,which is intended to provide certain suggestions and directions for the theoretical analysis and experimental research of SHCC dynamic performance in the future.

关 键 词：应变硬化水泥基复合材料 应变率 多缝开裂 动力学性能 冲击 

分 类 号：TU528[建筑科学—建筑技术科学]