抄録
The effect of vertical earthquake motions plays an important role for the design of a long-span structure. This paper considered a simply supported roof shell on a square plan and investigated the effects of vertical earthquake motions considering phase differences of applied earthquake motions at the bases. As a result of dynamic analysis, the following results have been obtained. i) The uniform support excitations from earthquake, which are identical and have no phase differences, give rise to larger values of responses than those induced from some different classes of support excitations. ii) By the analysis under three earthquake motions : EL-CENTRO UD, TAFT UD and HACHINOHE UD, the presumptive coefficient α for non-dimensional maximum in -plane stresses remains constant with respect to τ (= R/ts), and the presumptive coefficient β for non-dimensional maximum bending stresses varies linearly with respect to τ. In accordance with above-mentioned results, this paper has proposed the presumptive equations for nondimensional maximum responses of in-plane and bending stresses.
