Safety Risk Evaluation of Large and Complex Bridges during Construction Based on the Delphi‐Improved FAHP‐Factor Analysis Method

Abstract

With the increase in construction scale and difficulty of large and complex bridges in China, it has become increasingly difficult to assess the safety risks of bridges during the construction period. Therefore, how to reasonably assess the safety risk of large, complex bridges during construction has become particularly important. Existing assessment methods are subjective in assigning weights, and it is difficult to select representative important factors to focus on for the prevention and control of numerous risk sources; they do not comprehensively consider the correlation of various risk sources during the construction period. To address the above shortcomings, a safety risk assessment of large and complex bridges during the construction period based on the Delphi-improved fuzzy analytic hierarchy process (FAHP) factor analysis method is proposed in this paper. First, the Delphi method was used to conduct a general survey of safety risk factors during the bridge construction period, and then the work breakdown structure-risk substructure (WBS-RBS) was used to establish the evaluation index system. Second, the improved FAHP was combined with it to calculate the weight of each risk factor. Finally, the factor analysis method was used to determine the correlation degree of each risk factor, and representative factors were selected to express the risk degree of the object to be evaluated to screen out major risk factors in the construction process. Finally, the feasibility and practicality of the method are verified by combining an actual engineering case with AHP (analytic hierarchy process) to perform a comparative study, which provides a reference basis for subsequent bridge construction risk prevention.

Safety Risk Identification Method for Railway Construction in Complex and Dangerous Areas

“…The WBS-RBS (work breakdown structure-risk breakdown structure) can systematically organize the risk patterns of projects [20], which facilitates risk planning response, data processing, and experience accumulation. However, at the same time, it cannot be well integrated with temporal and spatial changes.…”

“…Aliyari et al [19] carried out a preliminary risk analysis of a bridge with the help of UAVs. Ji et al [20] constructed the safety risk evaluation system of bridge engineering based on the WBS-RBS analysis method. Zhang et al [21] constructed the safety risk evaluation system of deep foundation pit projects based on the WBS-RBS analysis method, also.…”

Research on programmatic multi-attribute decision-making problem: An example of bridge pile foundation project in karst area

“…Xing et al [ 9 ] assessed the impact of various pile driving techniques and grouting methods on the mechanical properties of rock-socketed piles. Ji et al [ 10 ] based on the Yinzhou Lake Bridge project, identified sources of risk within divisional work and conducted risk prioritization. Li et al [ 11 ] constructed evaluation models to assess the construction safety risks of highway bridges.…”

Research on safety condition assessment methodology for single tower steel box girder suspension bridges over the sea based on improved AHP-fuzzy comprehensive evaluation

“…This method proves its practicality and efficiency in analyzing and evaluating multi-hazard risks for bridges. Ji et al 13 introduced a large-scale risk assessment method for complex bridge structures based on Delphi-enhanced Fuzzy Analytic Hierarchy Process (FAHP) factor analysis. The approach was validated through a comparative study with practical engineering cases and the Analytic Hierarchy Process, confirming its feasibility and practicality.…”