KR-102963306-B1 - Seismic isolation system

KR102963306B1KR 102963306 B1KR102963306 B1KR 102963306B1KR-102963306-B1

Abstract

The present invention discloses a distributed seismic isolation system that disperses seismic isolation functions acting in a vertical direction. The seismic isolation system of the present invention comprises a plurality of columns installed between a lower floor and an upper floor, a vertical seismic isolation member installed between the plurality of columns and the lower floor or between the plurality of columns and the upper floor, and a plurality of lateral seismic isolation members installed to connect the sides of the plurality of columns arranged adjacent to each other and to disperse the seismic load acting on the vertical seismic isolation member.

Inventors

김현욱

Assignees

한국수력원자력 주식회사

Dates

Publication Date: 20260508
Application Date: 20250424

Claims (4)

Multiple columns installed between the lower and upper floors, A vertical seismic isolation member installed between a plurality of the above-mentioned columns and the lower layer or between a plurality of the above-mentioned columns and the upper layer, A plurality of lateral seismic isolation members installed to connect the sides of a plurality of columns arranged adjacent to each other and to disperse the seismic load acting on the vertical seismic isolation member Includes, A plurality of the above-mentioned columns and the above-mentioned vertical seismic isolation members each consist of four units forming a set, and A first column installed between the lower layer and the upper layer, A second column positioned adjacent to the first column and installed between the lower layer and the upper layer, A third column positioned adjacent to the second column and installed between the lower layer and the upper layer, A fourth column positioned adjacent to the third column and the first column and installed between the lower layer and the upper layer, A first vertical seismic isolation member installed between the upper layer or the lower layer and the first column, A second vertical seismic isolation member installed between the upper layer or the lower layer and the second column, A third vertical seismic isolation member installed between the upper layer or the lower layer and the third column, A fourth vertical seismic isolation member installed between the upper layer or the lower layer and the fourth column, A first side seismic isolation member installed between the first column and the second column, A second side seismic isolation member installed between the second column and the third column, A third side seismic isolation member installed between the third column and the fourth column, and A fourth side seismic isolation member installed between the fourth column and the first column, Includes, A seismic isolation system in which a plurality of the above-mentioned vertical seismic isolation members and the above-mentioned lateral seismic isolation members are installed in a structure that is open outward from the lower layer, the upper layer, and the column.
In claim 1, The vertical seismic isolation member installed on a plurality of the above columns A seismic isolation system installed at a different location from the above-mentioned column positioned adjacently.
In claim 1, The plurality of the above-mentioned side isolation parts Lower seismic isolation section, An upper seismic isolation member positioned above at a distance from the lower seismic isolation member. A seismic isolation system including
In claim 1, The plurality of the above-mentioned side isolation parts Seismic isolation system made of laminated rubber material.

Description

Seismic isolation system The present invention relates to a distributed seismic isolation system applicable to nuclear power plants by distributing the seismic isolation function acting in the vertical direction. Generally, a seismic isolation device is a device installed between a superstructure and the ground (or lower layer) to protect the structure from seismic energy transmitted from the ground to the superstructure. Such a seismic isolation device is disclosed in Korean Registered Patent Publication No. 10-2388202. The aforementioned publication discloses a technology in which a single seismic isolation device supporting a superstructure is composed of an upper spring vertical seismic isolation section and a lower laminated rubber horizontal seismic isolation section. In such conventional seismic isolation devices, each system supports the superstructure independently without mutual interconnection. The technology disclosed in the above publication has a problem in that if permanent deformation occurs in the vertical seismic isolation springs at the corners, the function of the vertical seismic isolation part is lost, causing the superstructure to tilt toward that area, which may result in the structure overturning or being damaged. In addition, the technology disclosed in the above publication has a problem in that the remaining springs that are not damaged perform the vertical seismic isolation function, so the target restoring force and seismic isolation function cannot be fully exerted. Meanwhile, the United States Nuclear Regulatory Commission (US NRC), a major benchmark for domestic nuclear regulatory agencies, recommends the use of seismic isolation devices made of natural rubber and friction pendulums in its report NUREG/CR-7253 (2019), which do not undergo aging changes in mechanical properties. It also emphasizes that all seismic isolation devices must be able to naturally return to their original position by internal restoring force rather than external springs when displacement is caused by an earthquake. Therefore, conventional technology disclosed in the form of a spring-type vertical seismic isolation unit has the problem of difficulties in the licensing process, that is, it is practically difficult to apply it to nuclear power plants. Furthermore, seismic isolation systems applied to nuclear power plants face the challenge of having to consider more safety factors compared to requirements applied elsewhere. FIG. 1 is a drawing illustrating a seismic isolation system to explain an embodiment of the present invention. Figure 2 is a plan view of Figure 1. FIG. 3 is a diagram illustrating the operation of an embodiment of the present invention. Figure 4 is a drawing illustrating an example in which a seismic isolation system of an embodiment of the present invention is applied. Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. In the drawings, parts unrelated to the explanation have been omitted to clearly explain the present invention, and the same reference numerals are assigned to identical or similar components throughout the specification. FIG. 1 is a drawing for explaining an embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1 illustrating a seismic isolation system. The seismic isolation system of an embodiment of the present invention includes a first column (100), a first vertical seismic isolation section (150), a second column (200), a second vertical seismic isolation section (250), a third column (300), a third vertical seismic isolation section (350), a fourth column (400), and a fourth vertical seismic isolation section (450). Additionally, the seismic isolation system of an embodiment of the present invention further includes a first side seismic isolation section (120), a second side seismic isolation section (230), a third side seismic isolation section (340), and a fourth side seismic isolation section (410). In the embodiment of the present invention, the first column (100), the second column (200), the third column (300), and the fourth column (400) are preferably installed as columns that support the lower layer (500) and the upper layer (600) by being placed adjacent to each other between the lower layer (500) and the upper layer (600) (see FIG. 1 and FIG. 4). In the embodiment of the present invention, the lower layer (500) is a concept that is placed with space below the upper layer (600) and includes the ground and the lower foundation; for convenience of explanation, it will be referred to as the lower layer (500). In addition, in the embodiment of the present invention, the upper layer (600) is a concept that is placed with space above the lower layer (500) and includes the u