The Impact of Non-Structural Components on Fragility Curves of Single-Storey Industrial Precast Buildings

Abstract eng:
Fragility curves for six classes of precast buildings are presented. Only the type of non-structural components was varied in order to define different variants of investigated building classes. Precast buildings without non-structural components represented a base case of investigation. In addition, one building class with vertical panels, one with masonry infills and three building classes with horizontal panels were defined, each with a different type of panel-to-structure connections. Each building class was represented by a sample of 100 buildings. For each building a simplified three dimensional numerical model was built, in order to perform a large number of non-linear dynamic analyses, but still capable to account for phenomena such as panel-to-structure interaction, infill-to-structure interaction, sliding of the unrestrained elements and accounting for the non-structural components only until the point of their dislocation. Based on the simulations, fragility curves for three non-structural damage states and two structural damage states were developed. It can be observed that the type of the non-structural components had a detrimental impact on all levels of damage, including structural collapse. In addition, the effect of non-structural components is illustrated using an example of a non-linear dynamic analysis. It is shown that the mass of non-structural components had in most investigated cases detrimental effect on damage, whereas the effect of increased stiffness proved to be more unfavourable if the non-structural components are attached to the structure below the beam-to-column connection rather than above it.

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