Disaster Monitoring, Early-warning and Emergency Management of Long-span Bridges
Abstract »By the end of 2014, there have been 757,100 highway bridges in China with 42,578,900 meters, where long-span bridges 3404 with 6,105,400 meters. Because of the large scales and fast growing of bridges, and part of the bridges in service overloading for a long time for the coexisting of bridges with different years of construction and different load standards, the bridges in China are in a relatively high risk period. The interrupted traffic delays and loss of life and property are increasing gradually due to natural disasters, man-made disasters, extreme weather and environmental degradation. So the safety management of bridges in China is facing a new situation and challenge.
Facing the disaster risk of long-span bridges in service, the methods to identify hazards and extract disaster-induced response characteristics were studied systematically in this paper. A multi-objective system of early warning indicators for the safety of bridges was established. And a typical disaster emergency response library was constructed. On the basis of the establishment of a unified coding standard, a security monitoring and disaster emergency management system for long-span bridges was constructed. The research solved the disaster security problems encountered by long-span bridges in service, and improved the efficiency and science of the safety and emergency management of long-span bridges. It also met the needs of emergency management and resources schedule, and provided technical support for the sensing, early-warning and emergency management for the possible disasters occurred on long-span bridges.