TY - JOUR
T1 - Cyclic behavior of Peruvian confined masonry walls and calibration of numerical model using genetic algorithms
AU - Quiroz, Luis G.
AU - Maruyama, Yoshihisa
AU - Zavala, Carlos
PY - 2014/9/15
Y1 - 2014/9/15
N2 - The experimental results of four full-scale confined masonry (CM) walls subjected to cycling loading are presented. These structural elements are widely used in low- and mid-rise buildings in Peru to take the vertical and lateral loads. The objective of these experiments was to evaluate the cyclic behavior of CM walls constructed with handmade bricks and lime mortar. The brick units used in the walls were made of clay, and they were considered to be solid components. In the experiment, the dimensions of all the walls were kept constant in all specimens, but the reinforcement ratios of the confining elements (bond beam and tie-columns) were changed. The structural behaviors were examined in terms of the strength, lateral stiffness, dissipated energy, and equivalent viscous damping. Finally, an equivalent macro-model based on an equivalent strut approach with a smooth hysteretic model was calibrated and validated in order to reproduce the behaviors of the CM walls. For this purpose, we used a genetic algorithm (GA) that considered the experimental results of a CM wall. The parameters were applied to the results of the other CM walls to evaluate their applicability. The results of numerical simulations showed good agreement with the experimental results.
AB - The experimental results of four full-scale confined masonry (CM) walls subjected to cycling loading are presented. These structural elements are widely used in low- and mid-rise buildings in Peru to take the vertical and lateral loads. The objective of these experiments was to evaluate the cyclic behavior of CM walls constructed with handmade bricks and lime mortar. The brick units used in the walls were made of clay, and they were considered to be solid components. In the experiment, the dimensions of all the walls were kept constant in all specimens, but the reinforcement ratios of the confining elements (bond beam and tie-columns) were changed. The structural behaviors were examined in terms of the strength, lateral stiffness, dissipated energy, and equivalent viscous damping. Finally, an equivalent macro-model based on an equivalent strut approach with a smooth hysteretic model was calibrated and validated in order to reproduce the behaviors of the CM walls. For this purpose, we used a genetic algorithm (GA) that considered the experimental results of a CM wall. The parameters were applied to the results of the other CM walls to evaluate their applicability. The results of numerical simulations showed good agreement with the experimental results.
KW - Confined masonry wall
KW - Cyclic loading
KW - Equivalent strut approach
KW - Full-scale test
KW - Smooth hysteretic model
UR - http://www.scopus.com/inward/record.url?scp=84904126456&partnerID=8YFLogxK
U2 - 10.1016/j.engstruct.2014.06.035
DO - 10.1016/j.engstruct.2014.06.035
M3 - Artículo (Contribución a Revista)
AN - SCOPUS:84904126456
SN - 0141-0296
VL - 75
SP - 561
EP - 576
JO - Engineering Structures
JF - Engineering Structures
ER -