Model za prognoziranje produktivnosti procesa betoniranja
Author
Matejević, Biljana D.Mentor
Zlatanović, MiloradCommittee members
Dutina, VelimirMarković, Ljubo
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Show full item recordAbstract
Measuring of the productivity of work in civil engineering, as a very
complex and long lasting process because of the peculiarities of
construction activity is not sufficient per se; it is necessary to examine
and assess the impact of various factors on the realized productivity.
Concreting works, in construction of an engineering structure, have a
great importance from the viewpoint of quantities and costs,
especially if frame construction system has been implemented in
building construction. For such buildings, concrete works represent
key activities in the dynamic plan of construction works. For this
reason it is important to perform realistic planning of construction
works by good coordination of all factors and by providing the
required productivity. In our practice, planning of concreting process,
mostly boils down to experience without considering the factors
which affect the productivity of the process. The subject matter of
scientific research of this doctoral di...ssertation is the analysis of
productivity of performing concreting works when constructing
engineering structures and development of regression and simulation
models for concreting process productivity prediction. Concrete
works technology which is the subject of dissertation analysis
comprises making of concrete in concrete factory, transport using
mixer trucks to the construction site, transport with concrete pump to
the placing location and placing using poker vibrators. In the
dissertation the process of concrete works performance was
researched as a cyclic process in civil engineering, on actual and
ongoing projects for the purpose of obtaining actual data. The data
were acquired by recording the concreting process, by studying
technical and design documents and from interviews with technical
and working personnel directly engaged in the process, on eight
building construction sites and they were used for development of
regression and simulation models for predicting the concreting
process productivity. The analysis of the productive of concreting
process of vertical (columns, walls, bearing walls, elevator shafts) and
horizontal elements of engineering structures (beams, slabs, floor
structures, foundation slabs) has been conducted. By implementing
empirical, statistic, regression and simulation methods, the models for
concreting process productivity prediction were formed. The
proposed models can be useful in the planning phase and provide for
a more accurate predict of activity duration in the concreting process
and thus be beneficial for the decisions making, predicting of the
course of works and for a better management of concreting process
with a goal of increasing productivity, shortening works duration and
reduction of costs