已服役预应力混凝土梁板质量评估标准  

Quality evaluation standard of prestressed concrete beams and slabs in service

作　　者：许红叶 杨维国 柳霆 Xu Hongye;Yang Weiguo;Liu Ting(Hunan Technical College of Railway High-Speed,Hengyang 421002,China;Hunan Hengde Inspection Co.,Ltd.,Hengyang 421002,China)

机构地区：[1]湖南高速铁路职业技术学院,湖南衡阳421002 [2]湖南恒德检测有限公司,湖南衡阳421002

出　　处：《山西建筑》2020年第18期35-36,共2页Shanxi Architecture

基　　金：湖南省教育厅资助科研项目“基于钻孔应力释放法检测预应力梁板现存应力的研究”(17C0384)的阶段性成果。

摘　　要：通过研究已服役预应力混凝土梁板实际工程和试验,结合工程技术人员使用效果对八大评估因子进行了质量分级(二级制、三级制和四级制)和评价标准的制定。为了更加客观评价梁板质量,同步考虑了现存应力折减和应力释放系数K,并引入规范芯样分级理念,将质量等级分为四级,便于新进检测人员和资深检测人员应用,提高了检测的客观性。In this paper,the quality classification(two-level system,three-level system and four-level system)and the evaluation standard of eight evaluation factors are established by studying the actual project and test of prestressed concrete beams and slabs in service and combining with the use effect of engineering technicians.The existing stress reduction and stress release coefficient K are considered simultaneously in order to evaluate the quality of beam and slab more objectively.It is introduced that core sample grading concept of the standard.The quality grade is divided into four grades,which is convenient for the application of new inspectors and senior inspectors,and improves the objectivity of detection.

关 键 词：预应力混凝土 梁板 质量评估 钻孔应力释放法 

分 类 号：TU317[建筑科学—结构工程]