On August 8th, 2009, Typhoon Morakot invaded Taiwan and had caused serious damages to south of the island. A major portion of highway bridges located in the affected region were suffered from various natural hazards, such as slope failures, debris flows, floods, and scours. Despite the depressing fatalities and infrastructure damages, Typhoon Morakot did offer a great opportunity to observe behaviors of bridge foundations under different types of hazards. The presented study is in an effort to characterize the performance of bridge foundations under extreme natural hazards so as to investigate possible causes of the failures. In this chapter, basic information and analysis of Morakot are introduced first. Secondly, typical types of bridge failures are summarized and genuine causes of failures are discussed as well. Last, research progress of an intelligent safety monitoring system for bridge foundation is illustrated to further characterize performance of bridge foundation under scouring and flooding conditions. The proposed system is developed in an effort to access the vibration and deformation characteristics of bridge structures under various natural hazards. The system is concluded to be capable of providing valuable information of bridge stability during critical events; as well as to have better durability, functionality and efficiency than the conventional scour monitoring systems.
KeywordsDebris Flow Slope Failure Bridge Structure Highway Bridge Maximum Rainfall Intensity
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