Seismic vulnerability and safety of prefabricated AAC panel structures
The rural building were seriously damaged in previous major earthquakes.In order to improve its seismic performance,the seismic vulnerability and satety of a new prefabricated autoclaved aerated concrete(AAC)panel structure are studied,which has the advantages of energy saving and environmental protection,light-weight and high-strength,high-efficiency of construction.In this paper,6 AAC panel structures are designed comprehensively considering various factors including site conditions,number of floors,reinforcement ratios and strength.The structural limit state seismic vulnerability and safety are studied using displacement-based format,based on maximum ductility factor as an indicator.This study combines statistical methods with IM-based format to study the seismic vulnerability of structural collapse.The results show that the impacts of site conditions,number of floors and reinforcement ratios are obvious,while strength of AAC panel has a small impact.Site Ⅰ has the greatest impact on the structure,and the structure is basically intact under 8 degree frequent earthquake,mainly moderate and severe damage under rare earthquakes,and the average probability of collapse is only 4.34％,indicating that the structure has excellent seismic performance.
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