The work addresses the retrofitting of masonry columns through jacketing with polymeric-based composites. The presented numerical procedure assumes a strain-based incremental formulation relying on equilibrium, compatibility, and kinematic equations and precluding a strenuous integration required by a Finite Element approach. The strength domain of brick units and mortar joints is bounded by a multi-surface yield criteria: Mohr-Coulomb criteria in shear, a compression cap and a Rankine tension cut-off. Failure of the FRP is governed by limited tensile strength. A brittle response is considered for the system constituents, with exception for mortar joints in which an elasto-plastic response with limited ductility is assumed. The numerical strategy is validated with data from several experimental campaigns, but also compared with existing approaches from literature and code-based formulas. A good agreement has been found and the main purpose achieved, i.e. to develop a strategy that is accurate and fast.
PREDICTING THE UNIAXIAL COMPRESSIVE CAPACITY OF NON-STRENGTHENED AND FRP-STRENGTHENED MASONRY COLUMNS USING A FAST NUMERICAL APPROACH
Martins da Silva L. C.;Milani G.;
2023-01-01
Abstract
The work addresses the retrofitting of masonry columns through jacketing with polymeric-based composites. The presented numerical procedure assumes a strain-based incremental formulation relying on equilibrium, compatibility, and kinematic equations and precluding a strenuous integration required by a Finite Element approach. The strength domain of brick units and mortar joints is bounded by a multi-surface yield criteria: Mohr-Coulomb criteria in shear, a compression cap and a Rankine tension cut-off. Failure of the FRP is governed by limited tensile strength. A brittle response is considered for the system constituents, with exception for mortar joints in which an elasto-plastic response with limited ductility is assumed. The numerical strategy is validated with data from several experimental campaigns, but also compared with existing approaches from literature and code-based formulas. A good agreement has been found and the main purpose achieved, i.e. to develop a strategy that is accurate and fast.File | Dimensione | Formato | |
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