TIME-DEPENDENT BEHAVIOR OF INTEGRAL BRIDGE WITH GEOSYNTHETIC-REINFORCED SOIL AND STEEL-REINFORCED-CONCRETE THROUGH-GIRDER-TYPE SUPERSTRUCTURE

Abstract

 Integral bridge with geosynthetic-reinforced-soil (GRS integral bridge) is a method of construction to integrate abutments and GRS with a bridge superstructure. Because of its structural system, i.e. highly statically indeterminate structure, it is concerned that the bridge with longer span may have larger influence on crack occurrence, caused by temperature deformation and shrinkage of concrete. This study aims to observe the time-dependent behavior of large-scale GRS integral bridge. For this purpose, authors carried out a long-term measurement of displacement, strain, etc. of GRS integral bridge with 60m bridge length.
 This paper describes the measurement results of 1.5-year measurement and the observed knowledge from the measurement results. As a result of the measurement, it was found out that the deformation behavior of the bridge by the shrinkage of concrete is relatively small and that by the temperature deformation differs in summer and winter, affected by the degree of constraint by the GRS. Considering these results, the time-dependent mechanism of resistance of the GRS integral bridge was discussed.