ABSTRACT
The finite sized shear band finally transitions to the assembly of sand and gravel particles owing to meso-scale damaging of cementitious binders. This paper proposes shear band kinetics in consideration of disintegration and/or gravelization of cementitious composites. A model that presents the transient features of confinement from cementitious composites to the rock/soil foundation is proposed. The model is applied to two different structures for verification and validation. One structure is double-beam coupling beams, where the unreinforced concrete strip sandwiched by reinforced concrete beams experiences large shear deformation under seismic load. The other structure is masonry structures, where mortar joints can be a relative weak zone. From the comparison of past experimental results of these structures with local weakness and the analysis results, it was determined that the proposed model may improve and widen the scope of nonlinear analysis in spite of its simplicity.
