CODES and design regulations of structures in the civil and aeronautical industry establish the limit states that a structure must resist. Usually structural responses are only considered on the intact configuration but some regulations contemplate the verification of limit states when part of the structure has collapsed. This is the case of several special structures such as high-speed train bridges formed by iron lattice where the design must be safe after a bar breaks due to an impact, or cable-stayed bridges where one of the cables collapses. Thus, the Post-Tensioning Institute of U.S. specifies that "cable-stayed bridges shall be capable of withstanding the loss of any one cable without the occurrence of structural instability". Furthermore, in the aeronautical industry, the Federal Aviation Administration (FAA) has published several Advisory Circulars (AC) in that sense, providing guidance for compliance with airworthiness regulations. An example of this could be to minimize the hazards that could occur to an airplane if a propeller blade fails and its impact causes a loss of structure in the fuselage. In this sense the AC specifies that "the airplane must be capable of successfully completing a flight during which likely damage occurs ...".
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