Representing Human Spatial Behavior by Self-Organizing Networks

Mizutori, Takamitsu; Kohiyama, Kenji

doi:10.1007/0-387-23152-8_8

Cited by 1 publication

(3 citation statements)

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“…In addition, it was demonstrated that the torsional response could be induced, even in a symmetric structure, owing to one‐directional ground excitation. Furthermore, it was confirmed that the proposed equations of motion [ 26 ] can predict the actual phenomenon well. When the Q – Δ resonance condition was satisfied, the translational acceleration response at the corner of the slab increased significantly.…”

Section: Discussionmentioning

confidence: 72%

“…Consequently, it is necessary to extensively investigate the Q – Δ effect. In a previous study, the authors conducted shaking table tests [ 26 ] and confirmed that the torsional response increased owing to the occurrence of the Q – Δ resonance. Moreover, it was considered that the occurrence of the Q – Δ resonance could be predicted using a theoretically deduced condition based on the considered equation of motion.…”

Section: Introductionmentioning

confidence: 75%

“…To predict the Q – Δ resonance in a symmetric single‐story structure, the authors previously proposed [ 26 ] the equations of motion while assuming the column to be an elastic Euler beam. The equations of motion were derived by considering the restoring force of the column up to the second‐order terms related to the Q – Δ resonance, while taking into account the geometric nonlinearity.…”

Section: Discussionmentioning

confidence: 99%

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Experiment of torsional response induced by the Q–delta resonance

Mizutori

Kohiyama

2020

Structural Design Tall Build

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Summary Because of geometric nonlinearities, vibrations in two horizontal directions can generate a torsional moment that induces a torsional response, even in a structure with no eccentricity; we term this phenomenon Q–Δ effect. In this study, the torsional response caused by the Q–Δ resonance was investigated by performing a shaking table test that involves a single‐layer symmetric specimen. The specimen was designed and fabricated by focusing on one of two resonance conditions. Its moment of inertia was adjustable by changing locations of weights, and the natural frequency in the torsional mode could be modified. We developed a numerical model of the specimen, in which the columns connected to the slab were integrated into an elastic Euler beam. It was confirmed that the torsional response increased near the predicted Q–Δ resonance point. In addition, the acceleration at the corner of the slab was significantly increased. The formulated equations of motion provided a better prediction of the actual phenomena. Because the specimen corresponds to a stiff and slender high‐rise building when converted into a full scale, the result suggests a need to be aware of the risk of torsional response increase due to the Q–Δ resonance.

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Section: Discussionmentioning

confidence: 72%

Section: Introductionmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 99%

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