Performance of single and double flat jacks in stone masonry lab tests

Pinho, Fernando F. S.; Serra, Rafael J.G.; Saraiva, André F.L.; Lúcio, Válter José da Guia

doi:10.1016/j.jobe.2021.102465

Cited by 6 publications

(1 citation statement)

References 8 publications

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“…Furthermore, the hydraulic jack is one of the most efficient types of equipment for improving traditional construction processes and structural projects. 2 The use of these jacks to lift heavy civilian structures has become relatively common, especially in the field of repair and recovery, 3 specific techniques have been developed for using them with bridges 4 and buildings, 5 including in historic and heritage projects, 6 and even as support tools in constructive/excavation processes, 7,8 rock breaking, 9 and as movement stabilizers. 10 Bottle-type jacks became popular in 1990 following developments in the automobile industry, but are also used in the medical area as components of hydraulic stretchers and inpatient elevators, in the repair of agricultural machinery, and for testing and construction operations.…”

Section: Introductionmentioning

confidence: 99%

Assessment of a hydraulic bottle jack as an effective device for controlling vibration and mitigating the effects of earthquakes

Wahrhaftig,

Menezes,

Conceiçao

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

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The aim of this work was to assess the capability of a hydraulic bottle jack to control vibrations and the effects of earthquakes. The first stage of the present investigation focused on determining the axial stiffness of the apparatus, in order to relate its behavior to that of a linear elastic element. To do this, uniaxial compression tests were carried out using a manually controlled servo system. In the second stage, a conceptual application based on the field of mechanical vibrations was considered. The experimental results confirmed the hypothesis of linear behavior and showed that the stiffness coefficient had distinct values of magnitude that depended on the cylinder height. Simulations were conducted in which the frequencies and the peak displacements of an idealized SDOF system subjected to earthquake excitation were adjusted based on the experimental stiffness. It was possible to conclude that the equipment analyzed here is an effective tool for controlling vibration and reducing displacement during a seismic event, and can be calibrated according to the specific conditions of operation. This is an important aspect of safety and functionality for mechanical and structural systems.

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