钢带嵌缝加固砌体结构抗剪性能试验研究  

Experimental Study on Shear Resistance of Masonry Structure Strengthened with Embedded Steel Strip

作　　者：赵亚军[1,2,3] 吴昊 许岩 刘洋 方宾彬[1] ZHAO Yajun;WU Hao;XU Yan;LIU Yang;FANG Binbin(School of Civil Engineering,Hebei University of Engineering,Handan,Hebei 056038,China;Experimental Teaching Demonstration Center of Mechanics,Hebei University of Engineering,Handan,Hebei 056038,China;Hebei Province Prefabricated Structural Technology Innovation Center,Handan,Hebei 056038,China;State Machinery Group Science and Technology Research Institute Co.,Ltd.,Beijing 100080,China)

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]河北工程大学力学实验教学示范中心,河北邯郸056038 [3]河北省装配式结构技术创新中心,河北邯郸056038 [4]国机集团科学技术研究院有限公司,北京100080

出　　处：《河北工程大学学报（自然科学版）》2024年第1期9-16,共8页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：国家自然科学基金资助项目(51908178)。

摘　　要：为提高砌体结构抗剪强度,同时保留原有风貌,采用“弓”字型钢带或钢筋对砌体试件进行嵌齿缝加固。利用数字图像相关方法对加固后的砌体结构进行沿通缝截面抗剪强度试验研究,并建立砌体抗剪试件有限元模型,分析钢带宽度对砌体抗剪强度的影响。结果表明:嵌入钢筋或钢带,均能够有效限制层间分离,提高砌体完整性,破坏模式由单剪破坏转化为双剪破坏。承载能力大幅提高,单面钢带、双面钢带、双面钢筋加固的试件极限荷载分别提高了23.63%,61.18%,35.02%,极限荷载对应位移提高了16.38%,23.41%,16.95%。钢带或钢筋的拉结作用可以提高砌体结构的延性,改善砌体结构脆性破坏的特征。To enhance the shear strength of masonry structures while preserving their original appea-rance,steel strips or bars are bent to fit the shape of the masonry joints and used to reinforce the masonry specimens,and digital image correlation(DIC)method was used to conduct shear tests on the reinforced masonry specimens.Furthermore,a numerical simulation method was utilized to create a model of the masonry shear test specimen and analyze the impact of the steel strip width on the shear strength of the masonry.The findings indicate that the embedded reinforcement or steel strip can effectively limit the separation between layers,enhance the integrity of the masonry,and transform the failure mode from single shear failure to double shear failure,resulting in a significant increase in the bearing capacity.The ultimate load of the specimens strengthened with single-sided steel strip,double-sided steel strip,and double-sided reinforcement has increased by 23.63%,61.18%,and 35.02%respectively.Additionally,the corresponding displacement at the ultimate load has increased by 16.38%,23.41%,and 16.95%.The tensile restraint effect of steel strips or bars can increase the ductility of masonry structures and modify the characteristics of brittle failure of the masonry structure.

关 键 词：砌体嵌缝加固 钢带 抗剪性能 数字图像相关方法 数值模拟 

分 类 号：TU362[建筑科学—结构工程]