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| Secondary system’s optimal position analysis concerning |
| Received:December 06, 2007 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20096007 |
| KeyWord:secondary system lateral-torsional coupling complex mode pattern search optimal position |
| Author | Institution |
| 国巍 |
大连理工大学 海岸和近海工程国家重点实验室,大连 |
| 李宏男 |
大连理工大学 海岸和近海工程国家重点实验室,大连 |
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| Abstract: |
| A majority of actual structures are eccentric structures, so the lateral-torsional coupling of primary-secondary systems, which has significant influence on secondary system’s response under earthquake loading, is needed to be considered. Considering torsion movement, the secondary system’s responses on different positions of the same floor are also different, and an optimal position for minimal response exists. In this paper a model of primary-secondary systems concerning lateral-torsion coupling and interaction between primary and secondary systems is established and studied from the point of random vibration, by using complex mode theory and pattern research method for secondary system’s optimal position, furthermore, the influencing factors of optimal position are also analyzed, such as direction of earthquake input, site of different classification, eccentricity of primary system, the mass, frequency, and damping ratio of secondary system etc. At the end of this paper some useful conclusions were provided by numerical work, from which we can see lateral-torsional coupling due to the eccentricity of structures and the interaction between primary and secondary systems have important effect on the secondary system’s response, and due to the interaction optimal position is not only located at corner of the plane any more. |
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