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

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.