双孔空心装配式预制梁力学性能试验研究  

Experimental study on mechanical properties of prefabricated beams with two hollow holes

作　　者：马少春[1,2,3] 田重榜 鲍鹏 张政浩[1] MA Shaochun;TIAN Zhongbang;BAO Peng;ZHANG Zhenghao(School of Civil Engineering and Architecture,Henan University,Kaifeng 475004,China;School of Water Conservancy Engineering,Zhengzhou University,Zhengzhou 450001,China;Kaifeng Research Center for Engineering Repair and Material Recycle,Kaifeng 475004,China)

机构地区：[1]河南大学土木建筑学院,河南开封475004 [2]郑州大学水利科学与工程学院,河南郑州450001 [3]开封市工程修复与材料循环工程技术研究中心,河南开封475004

出　　处：《混凝土》2021年第5期104-107,122,共5页Concrete

基　　金：国家住房和城乡建设部科技计划项目(2018-K9-065);中国博士后科学基金资助项目(2018M632805);河南省科技攻关项目(182102210234);河南省高等学校重点科研项目(18A560007);河南省住建厅科技计划项目(K-1823)。

摘　　要：为了研究双孔空心装配式预制梁的力学性能,共设计了3个双孔空心预制梁试件和1个普通实心预制梁对比试件。在试验室内相同约束和相同加载条件下,分别对其进行了力学性能试验。通过对破坏过程描述、荷载-挠度曲线、承载力及变形能力、裂缝分布及发展规律等进行对比分析,了解了双孔空心预制梁的力学特性和突出优势。研究结果表明:双孔空心装配式预制梁在加载过程中,裂缝分布均匀,发展规律显著。通过对荷载-挠度曲线对比分析发现,在跨中挠度相同时,空心预制梁的承载力小于实心预制梁。通过对承载力指标分析得出能满足工程基本要求。通过对承载力指标进行分析,试验值大于设计值,满足工程基本要求。In order to study the mechanical properties of the double-hole hollow prefabricated beam,a total of three pieces of double-hole hollow prefabricated beam and one piece of ordinary solid prefabricated beam were designed.The mechanical properties were tested under the same constraint and loading conditions in the laboratory.Through a description of the destruction process.,load-deflection curve,bearing capacity and deformation capacity,crack distribution and development law,the mechanical characteristics and prominent advantages of double-hole hollow precast beam are understood.The results show that the crack distribution of double-hole hollow prefabricated beam is uniform and the development law is remarkable.Through the comparative analysis of load-deflection curve,it is found that the bearing capacity of hollow precast beam is less than that of solid precast beam when the mid-span deflection is the same.By analyzing the bearing capacity index,it is concluded that it can meet the basic requirements of the project.

关 键 词：预制梁 双孔空心 荷载-挠度曲线 试验 裂缝 

分 类 号：TU528.7[建筑科学—建筑技术科学]