RENEWAL AND IMPROVEMENT OF STRUCTURES EXPLANATION OF PROCESSES

Abstract

 In the field that performs maintenance of infrastructures, there are a great topic about measure to make the life of a structure as long as possible, currently. Most of measures to lengthen the life of the structure are repair and retrofitting to perform after some damages occurred. Although a certain prolongation of the life span of the structures is possible with these repair and the retrofitting, large-scale renewal and reconstruction including the dismantling is finally necessary after all. On the other hand, there is already the history about renewal and improvement of the infrastructures in Japan, in order to improve the function that is installed in a structure, depending on the change of the condition around the structure including increase of the traffic and river repair. However, these techniques that have been already developed are hard to say that it is systematized.
 The subcommittee on renewal and improvement of structures in committee on hybrid structures, JSCE, carried out research activities for systematization of the renewal and improvement itself as well as technology of renewal and improvement, for two years, through the questionary survey to each management group, and the collection of construction examples about renewal and improvement technologies. In this report, the main points of contents provided in this committee are described.