Identification and control of prestress loss of concrete members

Abstract

Prestressing technology is widely used in buildings, Bridges and other infrastructures, but the problem of prestress loss has been a hinder for the use and maintenance of these facilities. so how to find the existence of prestress loss in time and accurately measure the existing effective prestress is a hot topic. This paper focuses on the development of prestress loss identification methods. They can be classified according to the technical route of direct measurement and indirect calculation. A large number of studies have shown that prestress loss often occurs in the construction stage of the structure. In order to better avoid the problems that may occur during this period, intelligent tensioning and grouting technology has been proposed and is constantly developing, serving various projects. By summarizing the advantages and disadvantages of existing studies, analysis of the means of prestress loss limitation can be formed, looking forward to peek the future development trend of intelligent control methods.