A Risk Assessment Of High-Pile Wharf Structure

Along with the increasing number and upsizing of wharves, there are damages found in the structure of wharves occasionally. High-piled wharf as a common structure in Chinese costal, its safety risk problem has been more and more drawing the attention of people. This paper uses risk theory and structure reliability theory to analyze the risk assessment of high-piled wharf structure. Risk assessment index is proposed to support practical engineering, which has useful social meaning and reference value.(1) Base on the theory of risk, the mathematical model of risk assessment of high-piled wharf was established, its value was the product of failure probability and failure consequence. According to the stress characteristics of high pile wharf, theory of structure reliability is adopted to analyze the simplified failure model of high-piled wharf. Load effects and resistance effects were studied to build performance function.(2) Life loss、economic loss and social environmental loss was studied, its value was given by considering its extent of injury. By the method of linear weighting and AHP theory, the integrated coefficient for high-piled wharf was obtained and the calculation model of failure consequence was established.(3) According to ALARP principle, F-N curve and risk matrix method, the risk acceptance criteria and risk assessment standard of high-piled wharf was proposed, along with the elementary countermeasure.(4) A systematic assessment for a certain port in Nanjing is presented. Finite software ANSYS was used to build the simulation model, Monte-Carlo method was adopted to calculate the failure probability, in which the specific assessment method is explained. This study provides useful references for application and development of safety assessment of wharves in practical projects.