A novel macroelement for seismic analysis of unreinforced masonry buildings based on MVLEM in OpenSees

Unreinforced masonry (URM) buildings are susceptible to extraordinary actions such as earthquakes compared steel or reinforced concrete buildings. Various methods have been developed for the computational analysis of URM in last few decades. The equivalent frame method (EFM) is one numerical modeling approaches widely used nonlinear analyses Different macroelements context EFM proposed. However, there still a need an efficient approach effort that can predict real behavior structural components with sufficient agreement and available opensource software packages. For this purpose, new macroelement based on multiple vertical line element (MVLEM) has study. MVLEM OpenSees platform comprising uniaxial macro-fibers shear spring flexure-dominated walls. novel macroelement, double modified (DM-MVELM) proposed consisting two elements tied at middle trilinear backbone behavior. DM-MVLEM capture axial-flexural interaction lower than finite models fiber beam-column elements. validated against test results level full-scale perforated wall. Unified (UM) composite (CSM) existing EFMs presented A study performed by comparing seismic walls modeled using UM, CSM, strategies. Results show damage patterns, spandrels be simulated was usually linear EFMs.