Risk Assessment Method for Cable System Construction of Long-Span Suspension Bridge Based on Cloud Model

Abstract

Cable system construction is one of the most risky construction stages of long-span suspension bridges, and a reliable risk assessment is an important means to ensure the construction safety. This study proposes a risk assessment method for cable system construction of suspension bridges based on the cloud model, which can combine randomness and fuzziness of risk information effectively. First, a multilevel evaluation index system is built by disassembling the process of cable system construction.Next,theindexweightsarecalculatedbytheuncertainanalytichierarchyprocess(AHP).Then,accordingtothe cloud model, a risk assessment model for cable system construction of the suspension bridge is established by realizing the mutualtransformationbetweenqualitativelanguageandquantifieddata.Finally,anillustrativeexampleconcerningtheriskof cable system construction of Wuhan Yang-Si-Gang Yangtze River Bridge is provided to demonstrate the feasibility and objectivity of the proposed method.