2020
DOI: 10.20898/j.iass.2020.204.007
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Seismic Response of Long-Span Domes Supported by Multi-Storey Substructures

Abstract: This paper investigates the seismic response characteristics of long-span domes. The natural periods of the prominent modes are longer than medium-span domes, which leads to a greater contribution from the higher modes to the response of the long-span dome. The acceleration distributions, particularly the vertical acceleration distributions are sensitive to the dominant mode shapes of these higher modes. This leads to inaccuracies when applying the previously proposed response evaluation methods. The vibratio… Show more

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Cited by 7 publications
(15 citation statements)
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“…In the case of relatively thin lattice domes, a large number of vibration modes with similar periods significantly participate in the response. 14 Nevertheless, it has been observed that when the out-of-plane stiffness of the roof is large (typical of double-layered domes 5 ), the response characteristics are predominated by four prominent modes which are denoted as O1, O2, O2.5, and I shown in Figure 1(b), 7,13,16 where O1 is the fundamental mode and has an asymmetric modeshape with one crest and one trough (Figure 1(b)). The O2 mode is the next higher mode with two crests and two troughs with high amplitude in the centre wave, followed by the O2.5 mode that is similar to the O2 mode but has lower amplitudes.…”
Section: Seismic Response Characteristics Of Double-layered Domesmentioning
confidence: 99%
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“…In the case of relatively thin lattice domes, a large number of vibration modes with similar periods significantly participate in the response. 14 Nevertheless, it has been observed that when the out-of-plane stiffness of the roof is large (typical of double-layered domes 5 ), the response characteristics are predominated by four prominent modes which are denoted as O1, O2, O2.5, and I shown in Figure 1(b), 7,13,16 where O1 is the fundamental mode and has an asymmetric modeshape with one crest and one trough (Figure 1(b)). The O2 mode is the next higher mode with two crests and two troughs with high amplitude in the centre wave, followed by the O2.5 mode that is similar to the O2 mode but has lower amplitudes.…”
Section: Seismic Response Characteristics Of Double-layered Domesmentioning
confidence: 99%
“…7,16 The amplification factors quantify the roof-substructure interaction defined by the substructure to roof period and mass ratios. 7,13,16 These roof horizontal and vertical accelerations (Figure 2) are then multiplied by the nodal masses to obtain the equivalent inertial static forces.…”
Section: Peak Substructure Responsementioning
confidence: 99%
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