By Adnan Ibrahimbegovic, Muhamed Zlatar
This booklet goals to supply a severe evaluate of the present wisdom and to point new demanding situations which are introduced through the current time in facing common man-made and average mess ups, leading to harm to constructions, infrastructure and human setting. the typical flooring for all difficulties of this type from the perspective of medical contents is the necessity to supply a brief overview of the damaging motion and its outcomes, speedy reconstruction, in addition to the hot foundation for a sustainable improvement of affected parts. the current probability of the terrorist assaults or unintentional explosions, the neighborhood army conflicts, the weather swap that brings soil erosion or but the harmful earthquake movement that happens in formerly inactive areas, are a number of examples of the type of disastrous events we deal with herein, besides the way in which of lowering their adverse influence.
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Extra info for Damage Assessment and Reconstruction after War or Natural Disaster (NATO Science for Peace and Security Series C: Environmental Security)
The spatial variability of the material properties results from the construction process and concrete placing. It must be accounted for in a probabilistic approach, the residual service life becoming a probabilistic variable, whose value is distributed in the structure (Stewart, 2001; Li, 2004). The second type of uncertainties can be reduced with a more cautious approach and with the modelling of environmental effects on the measurements. Data obtained at the laboratory, repeating for instance electrochemical measurements under varying ambient conditions, can be processed and used for this purpose.
M. Breidt, V. Nguyen, and F. Stangenberg, Structural collapse simulation under consideration of uncertainty, Proceedings NATO-ARW (eds. A. Ibrahimbegovic and M. , S. B. Colliat, and A. , F. Gatuingt, and A. , Mécanique non linéaire des solides déformables : Formulation théorique et résolution numérique par éléments finis, Hermes Science Publication – Lavoisier, Paris (ISBN 2-7462-1489-X) pp. , Nonlinear solid mechanics: theoretical formulations and finite element solution methods, Springer, Berlin (ISBN 978-90-481-2330) pp.
The first reason is that, for elastic materials, it exists a theoretical relation between the velocity of longitudinal waves and the elasticity modulus: E = c VL² ρ or VL² = E / cρ (1) where VL is the velocity of longitudinal waves, ρ is the mass density and c is a constant which depends on the Poisson’s ratio. Thus, assuming linear elasticity and providing a value to ν and ρ will lead to a direct assessment of Young’s modulus. NON-DESTRUCTIVE ASSESSMENT OF CONCRETE DAMAGE 37 One question is that of the influence of the water content on measurements.