Research and Development > JFE TECHNICAL REPORT >JFE TECHNICAL REPORT No.19-Special Issue on "Safe and Secured Urban Development" and "Energy and Environment" > Examples of Evaluation and Improvement in Seismic Capacity for Existing Plant Facilities

No.19 April 2014 - JFE TECHNICAL REPORT No.19-Special Issue on "Safe and Secured Urban Development" and "Energy and Environment"

Examples of Evaluation and Improvement in Seismic Capacity for Existing Plant Facilities

YOSHIDA Katsutoshi      MASUDA Hiroshi     OKAMOTO Noriaki

Abstract

The main purpose of improving the seismic capacity of an existing plant facility is not only to ensure the safety of the persons working in the facility at the time of the severe earthquake. It is also aimed to maintain the functionality of the plant, enabling it to quickly restart its operation after an incident. Moreover, during the reinforcement works, it is important that plant operation is not disturbed. This paper undertakes the said considerations in the following examples: (1) LNG unloading facility (Supporting structure: steel framing); Structural steel framing is reinforced by additional steel section to withstand seismic response based on Level 2 seismic motion. (2) City gas governor station (RC building); RC framing is reinforced by additional outer structural steel framing to reduce its seismic load. (3) Waste incineration plant facility (RC building with structural steel framing for roofing and siding); Combined steel and RC framing is reinforced by additional earthquake-resistance RC wall and steel bracing respectively, to satisfy the specified criteria for existing building.

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