Correlating dynamic characteristics from field measurements and numerical analysis of a high-rise building

✍ Scribed by Brownjohn, J. M. W.; Pan, T. C.; Deng, X. Y.

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 470 KB
• Volume: 29
• Category: Article
• ISSN: 0098-8847
• DOI: 10.1002/(sici)1096-9845(200004)29:4<523::aid-eqe920>3.0.co;2-l

✦ Synopsis

Using the concept of lumped masses and rigid #oor slabs, several mathematical models were built using a popular PC-based "nite element program to model a tall building with a frame-core wall structural system. These models were analysed to obtain the "rst nine mode shapes and their natural frequencies which were compared with those from "eld measurements, using numerical correlation indicators. The comparison shows several factors that can have a signi"cant e!ect on the analysis results. Firstly, outriggers connecting the outer framed tube system to the inner core walled tube system have a signi"cant e!ect on fundamental translational mode behaviour. Secondly, detailed modelling of the core considering major and minor openings as well as internal thin walls has the strongest in#uence on torsional behaviour, whose measurements were shown to be an important aspect of the dynamic behaviour for the structure studied. Fine tuning of an analytical model requires not just considering variation in values of structural parameters but also attention to "ne detail.