What Negative Impact does Wind have on the Deadline of a Construction Project? Mathematical Modeling for the Measurement and Optimization of Wind Effects

摘要

In regard to economic phenomena such as the expansion of trade, the interactions between markets encouraging companies to cross borders, the research for market in new areas should be accompanied by sufficient knowledge of their own environment and especially the weather conditions. Indeed, the objectives of a construction project (cost, deadline and quality) are affected by a multitude of events, of internal and external origin, such as climate changes when they are severe and abrupt. Certainly, each region is characterized by a specific climate. For some regions, it is rather the wind that remains the most characterizing climate factor. Wind is widely felt in areas exposed to currents such as (trade wind, North wind, Nordet, Harmattan etc?), in other places we underestimate, see, ignore the effects of wind, particularly on a construction site. Yet, the consequences of ignoring this risk factor can be heavy on a construction company (in terms of late penalty law for example); In fact, if bad weather affects particularly on the initial works: earthworks, foundations, slab; wind effects may proclaim during all the duration of the construction site. The wind affect all project?s aspects, quality, cost, safety as well as deadline. Nevertheless there are few studies that were interested in studying relation construction?s deadline and wind. Tangier, the city located on the Strait of Gibraltar, where the study was conducted, is exposed to wind whose origin is the Anti cyclone of the Azores, in addition to the local winds that are due to the presence of the two seas and imposing mountains, with a wind that might exceed 220km/h. The equation introduced by this study will allow evaluating (measuring) the impact of wind on the deadline (expressed ?), it shall encompass all aspects: - Limiting conditions of equipments existing in construction site (producers? references) - Recommendations of the standard practice - Regulation in terms of work?s limits conditions in case of wind The Weibull function that will be used in the study, its formulation will be explained in a simple manner in the heart of the text. The tool introduced at the end, statistically designed in order to manage this risk consists of an iterative system targeting the automation of decision making, searching the minimal of ?_Global and thus creating the optimal planning; it refers to Pareto and MPM management rules.