Earthquake Resistant Spatial Structures

K Ishikawa


The study deals with aluminum alloy spatial truss walls with fuse type joint connections subjected to horizontal earthquake motions. The fuse type connection consists of an aluminum ball joint, an aluminum hub and a steel bolt. A ductile elongation of the steel bolt due to a tensile stress is expected by avoiding the brittle collapse. The study proposes a fuse type connection by means of a tensile yield of the steel bolt in order to realize the ductile failure collapse mechanism of the wall type spatial structure. The fuse type connection prevents the brittle collapse induced by the member buckling and the tensile fracture of the weld connection. The proposed method using the property of the energy conservation can statically predict the horizontal maximum seismic response displacement at the top of the wall.

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