上下地震動を受けるトラス平板の耐震性について : 直交交差型トラス平板についての検討

抄録

In this paper the earthquake resistant capacity of orthogonal trussed grids subjected to vertical earthquake motions has been analytically studied by the same procedure as the previous one (1), and the resistant capacity is confirmed to depend on the out-of-plane slenderness ratio, the first natural period of the structure and the displacement spectrum of the applied earthquake motion. The results from the present study lead to the followings ; (1) Even if the load carrying capacity of the central beams under the static load P_s is lost for reason of lateral buckling, the trussed grid can endure against P_s and vertical earthquake motions because of the redunduncy of the peripheral beams. (2) An estimating formula of the collapse acceleration has been proposed and the validity has been shown.