Abstract

Info

Title:: Method for Predicting Service Life of Concrete Materials and Structures Based on Climate Environmental Action

Author(s):: WANG Qiang-qiang; JIANG Jian-hua; School of Civil and Transportation Engineering, Hohai University

Keywords:: RC structure; service life; durability test; predict; steel bar corrosion

Abstract:: In order to improve the accuracy of predicting the service life of concrete materials and structures, the whole process of service life of reinforced concrete (RC) structures in chloride environment was analyzed. Calculation models of service life in different key stages for the whole process were given respectively. Based on the action spectrum of climate environment, response spectrum of microenvironment in concrete and the timevarying model of the steel bar corrosion rate, the method for predicting the service life of new RC structures were proposed and an example was given to illustrate. According to the equality of the corrosion amounts of steel bar in different environment conditions, the concept of accelerated aging factor in concrete materials and structural durability test was proposed. Based on the durability test in artificial climate environment, the method for predicting the service life was put forward. The results show that the method proposed can improve the accuracy of predieting the service life of new concrete structures and make the design of durability test in the artificial climate environment more targeted.