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Appl. Sci. 2016, 6(11), 345; doi:10.3390/app6110345

Experimental Study on the Force-Bearing Performance of Masonry Structures with a Marble-Graphite Slide Seismic Isolator at the Foundation

1
School of Engineering and Technology, China University of Geosciences (Beijing), No. 29, Xueyuan Road, Haidian District, Beijing 100083, China
2
School of Architectural Engineering, North China University of science and technology, No. 46, Xinghua West street, Tangshan 063009, China
3
College of Architecture and Civil Engineering, Beijing University of Technology, No. 100, Pingleyuan, Chaoyang District, Beijing 100124, China
4
Academy of Railway Sciences, Scientific & Technological Information Research Institute, No. 2, Daliushu Road, Haidian District, Beijing 100081, China
*
Author to whom correspondence should be addressed.
Academic Editor: Giuseppe Lacidogna
Received: 25 August 2016 / Revised: 2 November 2016 / Accepted: 3 November 2016 / Published: 10 November 2016
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Abstract

As part of the search for a seismic isolator for low-rise buildings, this paper proposes a marble-graphite slide seismic isolation system composed of marble-graphite slides, an upper foundation beam, the lower counterpart of the upper beam, and the corresponding stop blocks, with the stop blocks consisting of restrictive screws, positioning plates, nut connectors and stop holes linking the two foundation beams. To provide the desired isolation performance, plain mortar bars can be included at the beam interface to better control the initiating loads for foundation slippage. Tests of low-reversed cyclic loading were performed on four different masonry specimens: a recycled brick wall, a clay brick wall, an integrated recycled brick wall with flay ash blocks sandwiched between, and its clay brick counterpart. The four specimens were provided with marble-graphite slide isolators placed at the foundations. The isolator thickness was 20 mm, and the graphite and the marble served as a lubricant and a bearing, respectively. This paper then analyses all of the specimens in terms of the damage that occurred, the initiating load for slippage, the hysteretic performance, the bearing capacity and the performance of the stop blocks. The results indicate that mortar bars embedded in the marble-graphite slide isolator offer effective control of the initiating load, and the isolation system delivers good hysteretic performance. The stop blocks are capable of withstanding a large-magnitude earthquake and are a good choice for constraining the slippage displacement. Damage or failure of the specimens occurs only when the low-reversed cyclic loading continues after slippage takes place. The design is shown to be an outstanding and flexible seismic scheme for use in low-rise buildings. View Full-Text
Keywords: clay brick; recycled brick; stem; insulating layer; integrated masonry structure; compressive test clay brick; recycled brick; stem; insulating layer; integrated masonry structure; compressive test
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Jia, S.; Liu, Y.; Cao, W.; Ye, W.; Zhang, Y. Experimental Study on the Force-Bearing Performance of Masonry Structures with a Marble-Graphite Slide Seismic Isolator at the Foundation. Appl. Sci. 2016, 6, 345.

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