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IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century


IASS Symposium 2016

SESSION: Seismic Analysis, Behavior & Design

Mobility of conventional slide bearings supporting steel roofs

< Table of Contents for Seismic Analysis, Behavior & Design
  • Proceedings Name: IASS 2016 Tokyo Symposium: Spatial Structures in the 21st Century
  • ISSN: (Electronic Version) 2518-6582
  • Session: Seismic Analysis, Behavior & Design
  • Pages: 9
  • Title: Mobility of conventional slide bearings supporting steel roofs
  • Author(s): Tetsuo Yamashita, Naoki Wada
  • Keywords: slide bearings, earthquake design, friction, stability, anchor bolt
Abstract
This paper discusses about mobility of conventional slide bearings supporting steel spatial roofs on the lower concrete structures. In many city gymnasiums in Japan, a steel roof is installed on the lower concrete frame. To avoid stress due to thrust or thermal stress, the bearings supporting the steel roof on the concrete column are designed to be mobile. Some of such conventional slide bearings suffered damage during the 2011 Tohoku Great Earthquake. However, some destroyed bearings showed no abrasion of moving. On the observation, we conducted further experimental study to investigate the mobility of actual slide beraings. It is found that the friction between the washer of anchor bolts and the top surface of base plate, which has been neglected so far, greatly influences the mobility. Moreover a quantitative condition for stable slide is formulated.

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