FraMCoS 9 2016 Berkeley, California, USA

Crack-gel interaction on the static and fatigue failure of ASR-damaged RC slabs

The research target of this study is degradation of punching shear strength due to Alkali Silica Reaction (ASR) in Reinforced Concrete (RC) slab members. At first, punching shear strength of ASR slabs was examined experimentally. The deformations of slab specimens…

First page of: Crack-gel interaction on the static and fatigue failure of ASR-damaged RC slabs
Year 2016
File Size 1.1 MB
Download PDF (1.1 MB)

Abstract

The research target of this study is degradation of punching shear strength due to Alkali Silica Reaction (ASR) in Reinforced Concrete (RC) slab members. At first, punching shear strength of ASR slabs was examined experimentally. The deformations of slab specimens due to ASR strongly depended on bar arrangements. Static punching shear strength also depended on bar arrangements. In addition to the static experiments, the fixed-point cyclic loadings were carried out in both dry and wet conditions. The punching shear fatigue strength of ASR-damaged specimen was reduced according to the degradation of the static punching shear capacity, but the further strength reduction was not observed even in case of the wet condition unlike normal reinforced concrete slabs. As the next step, the authors conducted the multi-scale chemo-hygral simulation with ASR-gel generations and migrations. The poromechanics-based multi-phase modeling succeeded to simulate the structural performance of ASR-damaged slabs.