TY - JOUR
N2 - The paper discusses service load measurements (weight of construction materials, small equipment and workers) conducted on 120 frame scaffoldings all over Poland in 2016‒2018. Despite the fact that the scaffolding should ensure the safety of its users, most accidents on construction sites are caused by fall from height. Service loads are one of the elements affecting the safety of scaffolding use. On the basis of the studies, maximum load on one platform and maximum load on a vertical scaffolding module for one day were obtained. They were treated as the random variables of the maximum values. Histograms and probability density functions were determined for these variables. The selection of a probability distribution consisted in the selection of a probability density function by means of fitting curves to the study result histograms using the method of least squares. The analysis was performed for distribution Weibull and Gumbel probability density functions which are applied for maximum values of random variables. Parameters of these functions can be used for the purposes of the reliability analysis to calibrate partial safety factors in simulation of service load during the scaffolding failure risk assessment. Besides, the probability of not exceeding the standard loads provided for frame scaffoldings for 120 weeks was established on the aforementioned basis. The results of the presented research show that in Poland there is a high probability of exceeding the permissible service loads in one year and thus there is a high risk of scaffolding damage.
L1 - http://journals.pan.pl/Content/119418/PDF/31_01935_Bpast.No.69(2)_26.04.21_K2_G_OK.pdf
L2 - http://journals.pan.pl/Content/119418
PY - 2021
IS - 2
EP - e136734
DO - 10.24425/bpasts.2021.136734
KW - scaffoldings
KW - service load
KW - extreme events
KW - probability distribution function
KW - safety
A1 - Błazik-Borowa, Ewa
A1 - Pieńko, Michał
A1 - Szer, Iwona
A1 - Hoła, Bożena
A1 - Czarnocki, Krzysztof
VL - 69
T1 - Probability distribution functions for service loads of frame scaffoldings
DA - 08.03.2021
SP - e136734
UR - http://journals.pan.pl/dlibra/publication/edition/119418
T2 - Bulletin of the Polish Academy of Sciences: Technical Sciences
ER -