# Optimization of lifting time with the help of a linear mathematical model in high-rise construction projects by considering non-demand fines

Document Type : Research Article

Authors

1 Department of Mathematics, Ferdowsi university of Mashhad

2 Department of Civil Engineering, Ferdowsi University of Mashhad

Abstract

Timely delivery of materials and equipment to the floors of a high-rise construction project is one of the main challenges for project managers. To solve this challenge, tools such as lifts and cranes are used to transport materials vertically. The way the lift moves between the floors of the building directly affects the completion time of the project. Therefore, providing an optimal schedule for vertical transportation in a high-rise project can lead to saving time and prevent delays in the project. In this paper, a mathematical model with the priority of activity in the day shift and also meeting the maximum amount of demand in two consecutive shifts, to minimize the time of lifting activity is presented. The proposed model tries to meet the demand of the floors as much as possible, and if the demand is so high that it is not possible to meet the demand during two consecutive shifts, considering the fine, it gives the best way to move the lift. Finally, the proposed method is validated on a real data sample related to a high-rise project. The proposed model, in addition to examining the actual sample compared to the models introduced in similar studies, provides an optimal material handling schedule for each work shift.

Keywords

#### References

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