The comparative role of friction in local out-of-plane mechanisms of masonry buildings. Pushover analysis and experimental investigation

2016 ◽  
Vol 126 ◽  
pp. 158-173 ◽  
Author(s):  
C. Casapulla ◽  
L.U. Argiento
2014 ◽  
Vol 621 ◽  
pp. 137-142 ◽  
Author(s):  
Luigi Sorrentino ◽  
Omar Alshawa ◽  
Luis D. Decanini

Severe earthquakes throughout the world show that existing masonry buildings are prone to suffer out-of-plane local-collapse mechanisms. In such mechanisms energy dissipation is mainly due to impacts against the remainder of the structure. Using data from an experimental campaign on free-rocking walls, estimation are suggested for the coefficient of restitution in both two-sided (façade resting on a foundation) and one-sided (façade adjacent to transverse walls) rocking. Both brick and tuff elements are considered, and the relevance of test repetition and wall height-to-thickness ratio is addressed.


2000 ◽  
Vol 75 (4) ◽  
pp. 429-451 ◽  
Author(s):  
Ronald R. King ◽  
Rachel Schwartz

This paper reports the results of an experiment designed to investigate how legal regimes affect social welfare. We investigate four legal regimes, each consisting of a liability rule (strict or negligence) and a damage measure (out-of-pocket or independent-of-investment). The results of the experiment are for the most part consistent with the qualitative predictions of Schwartz's (1997) model; however, subjects' actual choices deviate from the point predictions of the model. We explore whether these deviations arise because: (1) subjects form faulty anticipations of their counterparts' actions and/or (2) subjects do not choose the optimal responses given their anticipations. We find that subjects behave differently under the four regimes in terms of anticipation errors and departures from best responses. For example, subjects playing the role of auditors anticipate investments most accurately under the regime with strict liability combined with out-of-pocket damages, but are least likely to choose the optimal response given their anticipations. This finding implies that noneconomic factors likely play a role in determining subjects' choices.


2019 ◽  
Vol 19 (4) ◽  
Author(s):  
Liangcong Fan ◽  
Zechun Ying ◽  
Yuemei Yuan ◽  
Xinchao Zhang ◽  
Bin Xu

Abstract Corrupt deals are commonly arranged by intermediaries. However, attempts to deter corruption pay little attention to the role of intermediaries in corrupt deals. This paper reports a laboratory bribery experiment on corruption designed to investigate how intermediaries with information about the lowest bribe that the official is willing to accept in a briber-initiated corrupt deal affect the effectiveness of the four-eyes-principle (FEP) on deterring corruption. We find that the introduction of the FEP significantly decreases the corruption level by increasing uncertainty. However, the presence of intermediaries with information completely offsets the positive effect of introducing the FEP on preventing corruption. Our findings suggest that further research on corruption should allow a more active role of intermediaries, and legislators should take the role of intermediaries into account when designing anti-corruption mechanisms.


2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Roxana-Alina One ◽  
Hélène Béa ◽  
Sever Mican ◽  
Marius Joldos ◽  
Pedro Brandão Veiga ◽  
...  

AbstractThe voltage controlled magnetic anisotropy (VCMA) becomes a subject of major interest for spintronics due to its promising potential outcome: fast magnetization manipulation in magnetoresistive random access memories with enhanced storage density and very low power consumption. Using a macrospin approach, we carried out a thorough analysis of the role of the VCMA on the magnetization dynamics of nanostructures with out-of-plane magnetic anisotropy. Diagrams of the magnetization switching have been computed depending on the material and experiment parameters (surface anisotropy, Gilbert damping, duration/amplitude of electric and magnetic field pulses) thus allowing predictive sets of parameters for optimum switching experiments. Two characteristic times of the trajectory of the magnetization were analyzed analytically and numerically setting a lower limit for the duration of the pulses. An interesting switching regime has been identified where the precessional reversal of magnetization does not depend on the voltage pulse duration. This represents a promising path for the magnetization control by VCMA with enhanced versatility.


Author(s):  
Paulo B. Lourenço ◽  
Nuno Mendes ◽  
Alexandre A. Costa ◽  
Alfredo Campos-Costa

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