Abstract

Info

Author(s):: LI Fu-min; DENG Tian-ci; WANG Jiang-hao; LUO Xiao-ya; Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology

Keywords:: prestressed concrete structure; durability; review; research system; corrosion; damage evolution

Abstract:: Aimed at the existing problems and future requirements on the durability of prestressed concrete (PC) structures, the research proceeding on durability of PC structures was summarized systematically and analyzed. The research system of the durability of PC structures was put forward, where the research background, objects, clue, aim, scientific issues, technological issues, contents and technical lines were concerned in. The state-of-the-art of the research was reviewed as five parts: the issues of durability about the damage of concrete, the issues of durability about the corrosion of steel bars, the issues of durability about the corrosion of anchorage and joint system, the technology of testing, raising and experiment of durability, and the technology of numerical simulation of durability. Seven issues about the durability of PC structures, which needed more research work, were suggested. The issues included the quantitative models of environmental action, the transporting behavior of corrosive mediums, the evolving models of corrosion fatigue damage, the corrosion behavior of anchorage and joint system, the corrosion behavior of geotechnical PC structures, the technology of raising durability and the technology of numerical simulation of durability. The study can provide references for further expanding and improving the research work on durability of PC structures.