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B Möller, A Hoffmann, and M Liebscher (2004)
Modeling of Blasting Processes in View of Fuzzy Randomness
In: 9th ASCE Specialty Conference on Probabilistic Mechanics and Structural Reliability. ASCE.
The objective of blasting operations is to shatter a building in
such a way that the remaining debris can be removed easily. When
blasting operations are carried out in urban areas, the surrounding
properties should not be affected by debris or accompanying ground
vibrations. To obtain a reliable prediction of the collapse process and its
effects, a realistic simulation is necessary. In the stochastic sense,
each blasting is an individual event that is characterized generally
by limited data and distinctive data uncertainty. The mathematical
description of data uncertainty is realized on the basis of fuzzy
randomness. Fuzzy randomness is a generalized uncertainty model that
includes fuzziness and randomness as special cases. In fuzzy stochastic
structural analysis the uncertain input parameters modeled by fuzzy
randomness are mapped to fuzzy random results. The mapping is carried
out by a so-called mapping model. In the case of blasting a multi
body system algorithm is applied as mapping model. The structure is
subdivided into rigid and flexible parts. Flexible parts represent
potential failure zones that are subject to the major damages or
destructions during the collapse of the structure. This mechanical
behavior is modeled by nonlinear load-displacement-relations that
describe crack development, articulation, and failure. The fuzzy
stochastic analysis of blasting is demonstrated by way of an example.
