| Popis: |
Cable-stayed bridges provide an efficient structural solution over a wide range of span lengths and, as a structural form, are often used to build an iconic structure. Protecting them from threats, both malicious and accidental, presents a number of challenges. This paper presents a number of different mitigation decisions made as a consequence of Accident Threat and Vulnerability Assessment (ATVA), sometimes known as Risk and Vulnerability Assessment (RVA), in the design development of four cable-stayed bridges currently under design or construction in the United States (US), and for which the authors have knowledge of the design. Details about each bridge are provided for the purposes of comparison and are limited so as to maintain the confidentiality of the threat and vulnerability assessment of the specific bridges discussed. Key considerations discussed for the bridges include: (1) main tower protection, (2) deck stability, (3) loss of cables, and (4) fire protection. |
