engleski

Simple design of masonry infilled reinforced concrete frames for earthquake resistance

The extensive use of reinforced concrete frames with masonry infill and national and European regulations which often neglect the influence of infill has been identified as a field of research. The reliability of the numerical model with an equivalent diagonal for the parametric analysis of model buildings was tested on various experiments with one story one bay and multi-storey multi-bay infilled frames. Variability of parameters was simplified by classification of components based on the strength of materials (masonry infills) and the coefficients of longitudinal reinforcement (reinforced concrete frame). The number of storeys, area ratio of infilled frame area in relation to the floor, and the variability of ground acceleration as a measure of earthquake loading were investigated. The results showed the contribution to increasing damage by increasing the number of storeys, decreasing the compressive strength of masonry infill, reducing longitudinal reinforcement ratio of column, reducing the area ratio, and increasing the peak ground acceleration value. The great importance of area ratio ρ in the numerical model was observed, therefore the minimum value of area ratio was defined. The study resulted in method, which enables simple design of infilled frames. Based on the classification (masonry infill, peak ground acceleration, number of storeys) minimum infilled frame area ratio can be determined and according to calculation of real area ratio for observed building can be compared in order to infilled frame building achieve acceptable behaviour under possible earthquake event.

Design ; Infilled frames ; Simple ; Earthquake ; Damage level

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