Impact of mechanical properties of historical masonry bridges on fundamental vibration frequency

Structures ◽  
2020 ◽  
Vol 27 ◽  
pp. 1011-1028
Author(s):  
Onur Onat
Keyword(s):  
Mechanical Properties ◽  
Vibration Frequency ◽  
Fundamental Vibration ◽  
Historical Masonry

Rubber Recycling—Upgrading of Scrap Rubber Powder by Vulcanization. II

1982 ◽  
Vol 55 (4) ◽  
pp. 961-966 ◽  
Author(s):  
A. Accetta ◽  
J. M. Vergnaud
Keyword(s):  
Mechanical Properties ◽  
Dynamic Characteristics ◽  
Vibration Frequency ◽  
Compression Modulus ◽  
Thin Coating ◽  
Scrap Tires ◽  
Rubber Powder ◽  
Vibration Absorption ◽  
Damped System ◽  
Rubber Recycling

Abstract Vulcanizates from scrap tires have interesting mechanical properties that widen the range of their uses. These properties and dynamic characteristics (compression modulus, damping coefficient) undergo great changes as sulfur percentage is varied. This fact is particularly important in regard to the design of damping devices for the vibration absorption of industrial machines. The size of the machine as well as the vibration frequency must be taken into account to optimize the transmissibility factor of the damped system. The favorable results obtained for our materials in the damping of impact noises and their small compressibility foreshadow an efficient application in resilient coverings in buildings. Rubber slabs when stuck directly on the floor can be covered with a thin coating consisting, for instance, of thin tiles. The resilient covering can also be stuck on the floor and covered with lean mortar, a traditional way of laying tile.

Konstruktive Injektion von historischem Mauerwerk mit mineralisch- oder polymergebundenen Mörteln / Structural injection of historical masonry using mineral or polymer based grouts

1999 ◽  
Vol 5 (1) ◽  
pp. 73-98 ◽  
Author(s):  
D. Van Gemert ◽  
E.-E. Toumbakari ◽  
L. Schueremans
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Masonry Structures ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Recent Developments ◽  
Safety And Reliability ◽  
Historical Masonry ◽  
The Stability

Abstract Recent developments in injection grouts used for consolidation are proposed. Special compositious have been developed, made out of lime, cement and pozzolan. The stability, the viscosity and the mechanical properties are illustrated. Comparison is made with polymer grouts and with double injections using mineral and polymer grouts consequently. The influence of injections on the load-bearing capacity of the masonry is calculated. Some elements for the judgment of the safety and reliability of masonry structures are pointed out.

scholarly journals Ligand-dependent nano-mechanical properties of CdSe nanoplatelets: calibrating nanobalances for ligands affinity monitoring.

Nanoscale ◽  
2021 ◽  
Author(s):  
Quentin Martinet ◽  
Justine Baronnier ◽  
Adrien Girard ◽  
Tristan Albaret ◽  
Lucien Saviot ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Raman Scattering ◽  
Cadmium Selenide ◽  
Vibration Frequency ◽  
Low Frequency ◽  
Frequency Shifts ◽  
Low Frequency Vibration

The influence of ligands on the low frequency vibration of different thicknesses cadmium selenide colloidal nanoplatelets is investigated using resonant low frequency Raman scattering. The strong vibration frequency shifts induced...

Predicted Fundamental Vibration Frequency of a Heavy Electronic Component Mounted on a Printed Circuit Board

1999 ◽  
Vol 122 (1) ◽  
pp. 3-5 ◽  
Author(s):  
Ephraim Suhir
Keyword(s):  
Vibration Frequency ◽  
Printed Circuit Boards ◽  
Printed Circuit Board ◽  
Flexural Rigidity ◽  
Practical Importance ◽  
Electronic Component ◽  
Circuit Board ◽  
Circuit Boards ◽  
Fundamental Vibration ◽  
Printed Circuit

External electric leads, soldered into plated through-holes (PTHs) of printed circuit boards (PCBs), provide, in addition to electrical interconnection, mechanical support for heavy electronic components (such as, say, power ones) mounted on the boards. The leads can possibly break (most likely by fatigue), if the PCB support contour is subjected to excessive oscillations. Such oscillations typically occur at the lowest resonant frequency (fundamental frequency). The ability to predict this frequency and possibly avoid resonance conditions is of obvious practical importance. Accordingly, in this analysis, we develop a simple formula for the evaluation of the fundamental vibration frequency of a heavy electronic component mounted on a PCB. The formula is obtained for the case, when the component has only one row of leads, and the vibrations occur in the direction of the least flexural rigidity of this row. [S1043-7398(00)00601-0]

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