界面粗糙度及加固层长度对加固梁的力学性能影响  

Effect of interface roughness and reinforcement layer length on the mechanical properties of strengthened beams

作　　者：杨志刚[1] 史承功 李晓霞[3] YANG Zhigang;SHI Chenggong;LI Xiaoxia(School of Architectural Engineering and Spatial Information,Shandong University of Technology,Zibo 255049,China;Jinan Sijian Construction Group Company Limited,Jinan 250031,China;School of Artificial Intelligence and Big Data,Zibo Vocational College,Zibo 255314,China)

机构地区：[1]山东理工大学建筑工程与空间信息学院,山东淄博255049 [2]济南四建(集团)有限责任公司,山东济南250031 [3]淄博职业学院人工智能与大数据学院,山东淄博255314

出　　处：《山东理工大学学报（自然科学版）》2024年第2期15-20,共6页Journal of Shandong University of Technology:Natural Science Edition

摘　　要：为研究钢筋混凝土梁加大截面加固后的力学性能,按照不同的界面粗糙度、加固层长度设计制作了部分混凝土加固梁,通过弯曲试验测得其界面滑移量和跨中挠度,并与整浇梁、原梁的弯曲试验结果进行了比较。分析结果表明:加大截面法加固梁能有效提高梁的强度和刚度,但延性有所降低;界面粗糙度是提高梁加固承载力的最重要因素;加固层长度不足会显著降低梁的承载力,并存在突然破坏的风险。In order to study the mechanical properties of reinforced concrete beams after section reinforcement,some reinforced concrete beams were designed and manufactured according to different interface roughness and reinforcement layer length.The interface slip and midspan deflection were measured by bending test,and compared with the results of the whole cast beams and the original beams.The analysis results show that the beams strengthened by enlarging the section can effectively improve the strength and stiffness of the beam,but the ductility is reduced;the interface roughness is the most important factor to improve the bearing capacity of strengthened beams;insufficient length of reinforcement layer will significantly reduce the bearing capacity of the beams,and there is a risk of sudden damage.

关 键 词：钢筋混凝土梁 加大截面 加固 滑移量 

分 类 号：TU375.1[建筑科学—结构工程]