Conducting vertical force transmission and rotation functions through laminated rubber pads with lead plugs inserted, firing behavior of lead plugs during earthquakes
Accepts horizontal displacement through shear deformation of laminated rubber
Main Material: Rubber + Lead (Lead)
overview
It yields easily against temperature loads, which are classified as long-term loads, and transmits a small horizontal force due to temperature loads on the bridge top plate to the piers. Exhibits great rigidity and suppresses displacement.
As for the seismic load, the lead completely yields, increases the natural period of the structure, reduces the magnitude of the seismic force, absorbs the vibration energy of the bridge top plate into the nonlinear behavior of the lead, and suppresses the vibration of the bridge top plate. Suppress.
Slide LRB applied (Patent No. 10-0879364)
Slide LRB support
pedestal layout
Issues when applying the monolithic LRB base
Rubber-based struts are struts that undergo shear deformation due to constant temperature and earthquake displacement.
When applied, it occurs when the size of the support must be designed to be large due to the stability against buckling of the rubber and the allowable acupressure area.
Slide LRB
There is no shear deformation in the drawing direction, and displacement is accepted on the sliding surface.
For the transverse direction, the LRB base is designed to undergo shear deformation.
Lead Rubber Bearing
구성
2개의 부반력부가 상ㆍ하부 보강판의 내부에 납 코어를 잡고 있는 구조로 납 코어의 이탈을 방지하여 수직 방향에 대한 부반력에 저항할 수 있고 수평 방향에 대해설계 수평력을 정확하게 전달할 수 있는 지진하중에 대해 구조적 안전성을 향상할 수 있는 기술임.
동일 성능 대비 항복강도 155%, 파괴강도 111% 향상, 9.8% 비용 절감 효과가 있음.
