170,337 research outputs found
An approach to dynamic control design for 3D masonry structures
No full textIn the paper one proposes the formulation of an approach aimed at effectively designing dynamic control systems for spatial masonry structures. Managing 3D masonry structures for protection purposes with regards to dynamic events is usually handled through drastic simplifications of the original structure or of the nonlinear material behaviour. The proposed approach is aimed at controlling the dynamic vibrations of the spatial structure on the basis of its proper modelling, in such a way to embed in the design process its nonlinearity. The presented algorithm, which is outlined together with some numerical results, is shown to be able to produce significant beneficial effects in terms of response mitigation
An Approach to Modeling of 3D Masonry Structures For Dynamic Analyses, Refurbishment And Control Of Vibrations
No full textThe paper focuses on the problem of analysis of masonry structures with spatial geometries, even under the perspective of performing adequate forecasts for design and planning of protection strategies and provisions. In this case an approach is outlined for handling the modelling of the structure without renouncing to the proper nonlinear material assumption, which means overpassing the drastic simplifications and gross schematizations that are usually introduced when dealing with 3D structures made of masonry
Natural disasters and preferences for the environment: Evidence from the impressionable years
No full textCan preferences for the environment be shaped? In line with the theories of social psychology, we show that natural disasters experienced during early adulthood induce pro-environmental attitudes. We support our findings by exploiting yearly natural disaster variation both within the US and across a sample of 102 countries whose citizens experience disasters at different points in time
Natural Disasters and Preferences for the Environment: Evidence from the Impressionable Years
No full textDo generations affected by natural disasters during the critical years of adolescence and
early adulthood form different preferences towards the environment than generations who are
not? Consistent with the theories of social psychology, we show that an environmental shock
experienced during the impressionable years (18-25 years old) help shape positive environmental
preferences. Individuals tend not to change beliefs in response to natural disasters experienced
in other age ranges. Using information from the General Social Survey and World Values Survey,
we exploit yearly natural disasters variation both within the US and across countries to identify
these effects
Natural Disasters and Preferences for the Environment: Evidence from the Impressionable Years
No full textDo generations a ̇ected by natural disasters during the critical years of adolescence and early adulthood form di ̇erent preferences towards the environment than generations who are not? Consistent with the theories of social psychology, we show that an environmental shock experienced during the impressionable years (18-25 years old) help shape positive environmental preferences. Individuals tend not to change beliefs in response to natural disasters experienced in other age ranges. Using information from the General Social Survey and World Values Survey, we exploit yearly natural disasters variation both within the US and across countries to identify these effects
Mechanical properties of laminated bamboo under off-axis compression
No full textTo investigate the compression performance of laminated bamboo, 210 laminated bamboo specimens were tested using seven different lamination angles. Six failure types were classified. All the specimens experienced elastic stage at the beginning of the loading process and then elastic-plastic stage. At the end of the elastic-plastic stage, specimens of 15°, 30° and 45° immediately reached the ultimate bearing capacity, showing brittle failure, while other specimens entered a longer plastic stage before failure. The off-axis compression strength and the apparent elastic modulus both decreased with the increment of the angle. Two empirical formulas were proposed to predict the off-axis compression strength and apparent elastic modulus of laminated bamboo compared with several well-known failure criteria. The Poisson's ratio in A/C planes increased with the increment of the angle while in B/D planes, it increased and peaked at 30° before decreasing. Based on Ramberg-Osgood relation, the compression and shear stress-strain curves were fitted
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