ارزیابی ایمنی در پروژه‏ های ساختمانی بر اساس روش های تحلیل سلسله مراتبی و فازی خاکستری

  Background and aims : The construction industry is known as one of the most dangerous industries according to itsunique nature . With the rapid developmentof construction inour country, thesafety problemsatconstruction siteshave becomeaserious problem . Therefore,paying attention tosafety,identifying its effective indicators and projects’ safetyevaluation is known as an essential issue for improvingsafety performanceof construction projects .   Method: Regarding thefactors influencing sitesafetywhich have fuzzyand uncertainnature , grey fuzzy analysis has been used in evaluating model.Greytheory which is one of the multi-criteria decision-making methods is usedto solve problems with discrete, vague andincompletedata . Also Analytic Hierarchy Process (AHP) is used to determine weight of each index . Inthree different constructionprojects which are analyzed as case studies , the indicators affecting construction safety are identifiedand the site safetysetting is studied.   Results: According to theresults,enoughequipment and preventive actions index obtained the highestweight( 0.307) andthe leastweight was for proper signage(0.018 ). Then, using grey fuzzy method , the currentsafety setting in three sites is evaluated and ranked . The safety setting of project 1 wasmoreappropriate.   Conclusion : Comparing the results with the past research, experimental observations and feedback from risk assessment group demonstrate that this method is reliable and useful therefore, it is recommendedthat safetymanagersuse thismethod and also use factorsidentified in thisstudy for safety performanceassessmentand reducingconstruction projects accidents.