摘要
为了提升装配式钢筋混凝土梁的力学性能,文中利用两点加载法对装配式整梁和叠合梁的破坏模型、承载能力、荷载挠度曲线进行对比分析。结果表明,分层浇筑+插筋补强梁破坏过程中产生了大量微裂纹,且斜裂纹延伸至界面处开始出现水平位移。整体浇筑装配式梁承受的开裂荷载和极限荷载分别比分层浇筑叠合梁降低17.1%及3.2%,最大挠度降低30.8%。总之,分层浇筑+插筋增强混凝土组合梁可承受的荷载水平更高且变形较低,承载能力和抗变形能力均优于整体浇筑梁。
In order to improve the mechanical properties of prefabricated reinforced concrete beams,two-point loading method was used to compare and analyze the failure model,load bearing capacity and load deflection curves of prefabricated whole beams and composite beams.The results show that a large number of micro-cracks occur in the failure process of the layered pouring+reinforced beams,and the oblique cracks begin to appear horizontal displacement at the interface.The cracking load and ultimate load of monolithic prefabricated beams are 17.1%and 3.2%lower than those of laminated beams,respectively,and the maximum deflection is 30.8%lower.In a word,the composite concrete beams with layered pouring and interlocking reinforcement can bear higher load level and lower deformation,and the bearing capacity and deformation resistance are better than that of the whole poured beams.
作者
聂一锌
Nie Yixin(Southwest Guizhou Vocational&Technical College Nationalities,Qianxinan,Guizhou 562400)
出处
《江西建材》
2024年第5期54-55,62,共3页
关键词
装配式
钢筋混凝土
叠合梁
力学特性
破坏模式
承载能力
Assembly type
Reinforced concrete
Superimposed beam
Mechanical properties
Failure mode
Carrying capacity
