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Robustness is the ability of a structure to withstand events like fire, explosions, impact or the consequences of human error, without being damaged to an extent disproportionate to the original cause - as defined in EN 1991-1-7 of the Accidental Actions Eurocode. A structure designed and constructed to be robust should not suffer from disproportionate collapse (progressive collapse) under accidental loading.〔(【引用サイトリンク】title=Structural robustness )〕 Buildings of some kinds, especially large-panel systems and precast concrete buildings, are disproportionately more susceptible to collapse; others, such as in situ cast concrete structures, are disproportionately less susceptible. The method employed in making a structure robust will typically depend on and be tailored to the kind of structure it is, as in steel framed buildings structural robustness is typically achieved through appropriately designing the system of connections between the frame's constituents. 〔 ==Design considerations== Three alternative measures are used, sometimes jointly, to achieve structural robustness and reduce the risk of disproportionate collapse.〔(【引用サイトリンク】title=FIB bulletin 43 Structural connections for precast concrete buildings )〕〔(【引用サイトリンク】title=International seminar on Precast Concrete Structures Accidental Actions and Progressive Collapse Arnold Van Acker )〕 These are: * Reducing the possibility of occurrence of accidental loading. * Preventing the propagation of a possible initial failure and increasing redundancy. Which includes the indirect method and the alternative load path method. * Designing the structure to withstand accidental loading. Sometimes referred to as specific load resistance method. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Structural robustness」の詳細全文を読む スポンサード リンク
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