Heat state of pendulum sliding bearings under seismic effects

Drozdov, Yu. N.; Nadein, V. A.; Пучков, В. Н.; Puchkov, M. V.

doi:10.3103/s1068366608040041

Cited by 8 publications

(8 citation statements)

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“…The material of the pad provided high load capacity and energy dissipation, thanks to a friction coefficient between 0.05 and 0.12, however it also exhibited large frictional resistance at breakaway and poor wear endurance, preventing the use of the isolators in structures subjected to large and repeated movements. A number of self-lubricating materials with enhanced properties have been proposed in recent years, and even though some of them proved to operate efficiently under extreme conditions (Drozdov et al 2008;Braun 2009), the selection of materials having all the necessary characteristics to operate in a curved surface sliding bearing system in seismic isolation is still a critical task.…”

Section: Introductionmentioning

confidence: 99%

Experimental assessment of sliding materials for seismic isolation systems

Quaglini

Dubini

Poggi

2011

Bull Earthquake Eng

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Novel self-lubricating materials are currently being proposed to be used in sliding isolation systems such as the curved surface sliding isolator system, or pendulum bearing system, for the protection of buildings and structures. The current codes for anti-seismic devices are focused on the evaluation of the performance of the whole isolation system; as a consequence, a reliable procedure for the pre-assessment of the material combinations of sliding interfaces is currently missing. Therefore in this paper, an experimental methodology is proposed for the characterization of self-lubricating materials through tests on small-scale specimens performed using customized equipment able to reproduce the operational conditions\ud of real isolation systems as per contact pressure, sliding velocity, temperature and slide path. The testing sequence has been designed in order to evaluate the sliding properties of the material in terms of static and dynamic coefficient of friction and wear resistance. Examples are reported for the assessment of two self-lubricating materials with different sliding characteristics.\ud In order to validate the method and to confirm the reliability of extrapolating the results to real working conditions, prototypes of pendulum isolation systems incorporating the assessed materials have been tested according to North American specifications and the relevant dynamic properties assessed from the Horizontal Load—Displacement loops. The experimental outcomes confirmed\ud that the frictional characteristics provided by the proposed procedure can be reliably used in the design of seismically isolated structure

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Section: Introductionmentioning

confidence: 99%

Experimental assessment of sliding materials for seismic isolation systems

Quaglini

Dubini

Poggi

2011

Bull Earthquake Eng

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“…The theoret ical solutions of surface contact temperature rise and the laws of temperature distribution through depth are elaborated and verified by comparing them with experimental results [5,6].…”

Section: Seismic Effect On Fpb Tribological Characteristicsmentioning

confidence: 98%

“…The temperature rise in the calculation model of bidirected motion is used to determine equivalent unidirectional motion. The thermodynamical dependence is based on the maintenance of average temperature growth on the sliding surface [5,6]. Figure 4 shows the bearing motion in two direc tions calculated from the platform dynamic evaluation [1].…”

Section: Seismic Effect On Fpb Tribological Characteristicsmentioning

confidence: 99%

“…The experiments with the contact of the real sliding pendulum bearing were conducted using the PTFE as antifrictional material and the stainless steel plate as the counterbody. A number of assumptions were made in the finite element model [6].…”

Section: Thermal State Of Frictional Seismic Insulatorsmentioning

confidence: 99%

“…These works used experimental calculation techniques to estimate the life of the seismic insulating pendulum sliding bearing in order to determine its wear rate. The dependences of determining the wear rate are presented in summarized variables and the coefficient of friction and temperature assessments to establish the temperature condition of the FPB [4,6]. …”

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Application of frictional pendulum sliding bearings for seismic insulation

2014

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The sea platforms Lun A and PA B of the Sakhalin 2 project erected off the northwestern coast of Sakhalin have been designed and constructed taking into account the severe regional seismicity in which they are used. Their design, which incorporates an effective frictional pendulum bearing (FPBs are capable of running damage and failure free when exposed to loads created by earthquakes, which occur once every 200 years, and should stay undamaged in the case of a rare earthquake, which occurs once every 2000 years [1][2][3]. When the Arkutun Dagi deposit was put to use, the seismic reliability of oil producing Sakhalin 2 project was designed for use on the previously tested platforms at the Lun and Piltun Astokh deposits. The Sakhalin 2 project was seismically protected and have been successfully and safely used since 2007. These works used experimental calculation techniques to estimate the life of the seismic insulating pendulum sliding bearing in order to determine its wear rate. The dependences of determining the wear rate are presented in summarized variables and the coefficient of friction and temperature assessments to establish the temperature condition of the FPB [4,6].

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