구조 실험과 SASW를 이용한 플랫 플레이트 기둥-슬래브접합부에서의 구조적 거동에 관한 연구

Abstract

ABSTRACT This paper is to study the response of flat plate slab-column connections consisting of various types of shear reinforcement and steel plate subjected to gravity loadings, mainly punching shear forces using the non-destructive testing, spectral analysis of surface waves and structural experiments. The four test specimens were prepared to model the interior bay flat plate slab-column connections in a typical flat-plate slab building. The base specimen failed due to punching shear generated from the gravity. The three other types of slab shear reinforcement and steel plate showed effective in resisting punching shear for these types of connections under gravity loading. The structural behavior of the four specimens has also been tested using a non-destructive test called spectral analysis of surface waves. The spectral analysis of surface wave method has been conducted at various controlled-time and loading conditions in the four different specimens to evaluate the material properties as the specimens deform under the different loading conditions. This study has focused in evaluating the velocity response of a Surface wave during the early age as the poured concrete specimens have been hardened, the possibility of damage detection in the slab-column connection and the relationship between the punching shear forces and the surface wave velocities under the condition that the punching shear forces had gradually increased until the flat plate slab in slab-column connection had been failed.