The masonry infills significantly modify the seismic behavior of reinforced concrete (RC) buildings. The damages observed in past earthquakes showed as an irregular distribution of infills could involve in a soft story mechanism or in local damages due to the interaction with the surrounding frames. On the other hand, if regularly distributed, the masonry infills could significantly increase the shear capacity of RC structures. Generally, the infills are realize of masonry elements and mortar joints. As well known, the experimental studies available in the literature underlined as the mechanical properties of masonry materials varied in a wide range. For this reason, in the assessment of seismic behavior of structures, the mechanical properties of the infills should be taken into account. In this study a parametric analysis has been carried out to study the influence of mechanical properties of masonry infills on the seismic behavior of RC frames; in particular, the Young modulus and the shear strength of masonry infills have been varied in the range usually proposed in literature. The influence of infills has been evaluated by means of increasing accuracy of the analysis (linear, push-over and IDA analysis) to study the main parameters involved in the seismic response.
Influence of infill properties on the seismic behavior of R.C. frames
PERRONE, DANIELE;Gianni, Blasi;LEONE, Marianovella;AIELLO, Maria Antonietta
2015-01-01
Abstract
The masonry infills significantly modify the seismic behavior of reinforced concrete (RC) buildings. The damages observed in past earthquakes showed as an irregular distribution of infills could involve in a soft story mechanism or in local damages due to the interaction with the surrounding frames. On the other hand, if regularly distributed, the masonry infills could significantly increase the shear capacity of RC structures. Generally, the infills are realize of masonry elements and mortar joints. As well known, the experimental studies available in the literature underlined as the mechanical properties of masonry materials varied in a wide range. For this reason, in the assessment of seismic behavior of structures, the mechanical properties of the infills should be taken into account. In this study a parametric analysis has been carried out to study the influence of mechanical properties of masonry infills on the seismic behavior of RC frames; in particular, the Young modulus and the shear strength of masonry infills have been varied in the range usually proposed in literature. The influence of infills has been evaluated by means of increasing accuracy of the analysis (linear, push-over and IDA analysis) to study the main parameters involved in the seismic response.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
