Comprehensive risk analysis of economy, society and environment for the structural failure of gravity wharf

The study on comprehensive risk assessment of gravity-wharf structural failure is of great significance in engineering application. In this paper, the main economic, social and environmental risks caused by the failure of gravity wharf are identified by using the fishbone diagram method, and the main failure consequences of gravity-wharf structure such as life loss, economic loss, social and environmental impact are quantified, and AHP method is used to determine the weight. The linear weighted sum method is used to construct the comprehensive assessment coefficient of consequences and the assessment standard of failure risk level of gravity-wharf structure is established based on ALARP principle. Combined with the overall failure probability analysis of gravity-wharf serial system based on Rosenblueth method, the comprehensive assessment system of the economic, social and environmental risks of gravity-wharf structural failure which is established in this paper, can realize the comprehensive assessment of the economic, social and environmental risks of gravity-wharf structural failure. The study of caisson wharf structure shows that the comprehensive risk level caused by its failure is negligible risk, which can be acceptable.