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Ultimate Limit States of Piping Supports With Outer Diagonal Brace Under High Acceleration Sinusoidal Shaking Condition

[+] Author Affiliations
Ryuya Shimazu, Michiya Sakai

Central Research Institute of Electric Power Industry, Abiko-shi, Japan

Paper No. PVP2018-84937, pp. V008T08A023; 8 pages
doi:10.1115/PVP2018-84937
From:
  • ASME 2018 Pressure Vessels and Piping Conference
  • Volume 8: Seismic Engineering
  • Prague, Czech Republic, July 15–20, 2018
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5171-5
  • Copyright © 2018 by ASME

abstract

In this study, the fundamental mechanical inelastic behavior of piping supports was investigated in order to consider an effective elastic-plastic evaluation method. High-acceleration vibration tests were conducted using the resonance shaking table installed in Central Research Institute of Electric Power Industry (CRIEPI), and the ultimate limit states of piping supports under vibration conditions were observed. Each specimen had an outer diagonal brace. Buckling or fatigue failure occurred in the vibration test. Fatigue failure did not occur in the static load test. The static and dynamic skeleton curves were in agreement with each other when the failure mode was the same. When the response load did not reach the buckling load in the vibration test, fatigue cracks occurred after the stable response. The locations of the fatigue cracks tended to be where the local buckling occurred in the static tests. In both the vibration and the static load tests, even if the load decreased after the maximum load by buckling, the reaction force of approximately one third of the maximum load was seen, and the reaction force did not become 0 kN.

Copyright © 2018 by ASME

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