Energy Absorption Of Safety Nets In
Building Construction
Author(s)
E. G. Segovia Eulogio & R. Irles Más
Abstract
Safety nets used in buildings under construction in Europe are examples of
structures under impact. It would be of great interest to evaluate the energy
absorbed by the elements making up these devices (nets and supports) in order to
improve them and quantify injuries to victims of falls. Experimental tests on type
\“V” safety nets (EN 1263-1, 1997) were numerically modelled in this work
(consisting of dropping a 100 kg weight from 7 m above the nets). The model is
dynamic and highly non-linear (variable contact, geometric and material nonlinearities).
Two adjustment parameters were used to calibrate the numerical
model: the equivalent elastic modulus of the net and the equivalent structural
damping of the net. A value for each one was found, thus obtaining the same
weight drop and maximum strain on the gauges in the experimental tests. The
main conclusion, when numerical simulations were carried out using the
calibrated model, is the great difference between the energy absorbed by the net
and by the supports (ratio: 8-1). This means that, with research into net materials
focusing on this impact problem, absorbed energy is an important factor.
Keywords: safety nets, building under construction, structure under impact,
absorbed energy, numerical model.
1 Introduction
In the second half of the 20th century, different safety net systems for buildings
under construction were developed in several countries to prevent falls with the
consequent risk of serious injury or death.
With the vertical safety net system, practically exclusive to Spain, there have
been several accidents involving death or serious injury that have led to them
being improved (Saiz et al. [1]).
Keywords
safety nets, building under construction, structure under impact,
absorbed energy, numerical model.
Related Book
Other papers in this volume
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