یک مدل بهینه سازی چندهدفه برای حل مسئله چیدمان سایت های ساخت و ساز با درنظرگرفتن معیارهای ایمنی و ریسک

نوع مقاله : یادداشت فنی

نویسندگان

1 دانشجوی دکتری، دانشگاه آزاد اسلامی واحد رودهن

2 استادیار، دانشگاه آزاد اسلامی واحد صفادشت

3 استادیار، دانشکده مهندسی عمران، دانشگاه آزاد اسلامی واحد اهواز، تهران، ایران.

چکیده

در این تحقیق مساله جانمایی تسهیلات کارگاهی به عنوان یک مدل بهینه‌سازی چندهدفه مورد بررسی قرار گرفته است. توابع هدف مدل شامل بیشینه‌سازی سطح ایمنی احداث تسهیلات، کمینه‌سازی هزینه احداث تسهیلات و کمینه‌سازی ریسک ناشی از احداث تسهیلات است. با توجه به اینکه مساله جانمایی تسهیلات از رده مسائل NP-hard است، به منظور حل نمودهای عددی در دنیای واقعی از الگوریتم‌های فراابتکاری NSGAII، MOGWO استفاده می‌شود. مطابق با نتایج محاسباتی می‌توان مشاهده نمود که جبهه پارتویی تولید شده توسط الگوریتم‌های مذکور در مثال‌های عددی در ابعاد کوچک به مقدار بسیار زیادی بر جبهه پارتویی بهینه منطبق بوده که این موضوع نشان از کارایی این الگوریتم‌ها دارد. همچنین در مقایسه عملکرد الگوریتم‌ها در ابعاد متوسط و بزرگ نیز مشخص شده است که الگوریتم MOGWO دارای عملکردی به مراتب بهتر از الگوریتم NSGAII بوده و جهت حل نمودهای عددی در ابعاد واقعی مناسب است.

کلیدواژه‌ها


عنوان مقاله [English]

A Multi-objective Optimization Model for Solving Construction Site Layout Problem Considering with Safety and Risk Criteria

نویسندگان [English]

  • abdolrasoul parhizgar 1
  • alireza lork 2
  • Abdolrasoul telvari 3
1 PhD Candidate, Department of civil Engineering, Roudehen branch, Islamic azad University, Tehran, Iran
2 Assistant professor, Department of civil Engineering, Safadasht Branch, Islamic azad University, Tehran, Iran.
3 Assistant professor, Department of civil Engineering, Ahvaz branch, Islamic azad University, Ahvaz, Iran
چکیده [English]

This paper deals with construction site layout planning (CLSP) problem in the context of a multi-objective optimization model. According to the operational plans in Iran, in execution of the construction projects, special places are considered to accommodate the respective facilities in the jobsite. As an important part of project execution, the site layout planning has always been of concern for clients, contractors and consultants which is majorly intended to layout the facilities by properly arranging the them such as offices, warehouses, residences etc. such that materials, information and staff could be transferred optimally. Noteworthy, an appropriate layout improves level of safety and efficiency, reduces transport costs, prevents formation of bottlenecks and obstructions ahead of materials and equipment transfer particularly in mega projects. The site layout could be arranged with respect to the decision maker’s opinions based on different criteria. The model’s target functions include maximizing the safety level of construction facilities along with minimizing the corresponding costs and finally, minimizing the respective risks in potential areas. The constraints involve unique layout of each facility as well as the allowable distance between various facilities. Given the fact that the CSLP is classified as an NP-hard problem, it would be difficult to derive viable results using mathematical models whose solution process is time-taking as well. In this respect, to solve the numerical examples in a realistic representation scheme, NSGAII and MOGWO metaheuristic algorithms are applied. In order to compare efficiency of the proposed algorithms with the results derived from mathematical model solution, a number of standard measures have been used. The results indicate that the Pareto frontier produced by the proposed algorithms in numerical examples, is significantly in agreement with the optimal Pareto frontier in the case of small sizes approving great efficiency of the algorithms. Moreover, it was observed that in medium and large sizes, performance of the MOGWO surpasses that of NSGAII, making it appropriate for real-size cases. Lastly, results of this study could be considered as a management tool to make optimal strategic decisions aiming to develop the CSLP studies.

کلیدواژه‌ها [English]

  • Construction Site Layout Planning (CSLP)
  • Safety Maximization
  • Multi-Objective Planning
  • NSGAII
  • MOGWO