@inproceedings{87e08800f8704b7fbe5129c339f81e4f,
title = "The modification of finite element model of a coupled slab system utilizing measured modal parameters",
abstract = "This paper focuses on the modification of a finite element modeling of the coupled slab system of the Tin Shui Wai Indoor Recreation Centre in Hong Kong utilizing a set of measured modal parameters obtained from the field tests. The modification includes not only the updating of the model parameters through an optimization algorithm, but also the correction of the class of models based on the observed discrepancies between the model-predicted and measured modes shapes. The slabs for floors 2 and 3 of the Recreation Centre are supported by two truss systems, which are connected through six inner steel columns with diagonal braces. As a result, the vibrations of the two slabs are coupled. The 3D finite element (FE) model of the two coupled truss systems together with the two slabs was established referring to the design drawings. In order to fully determine the dynamic properties of the coupled slab system, a series of full-scale ambient and forced vibration tests were carried out to measure the vibration of the coupled slabs at 126 measurement stations. Translational vibration along three directions (denoted as x, y and z) is measured at each station resulting in, 378 (= 126 × 3) measured degrees of freedom (DOFs). The paper reports not only the finite element modeling of the structure but more importantly the stepby- step correction of the class of models in order to obtain a representative model class to capture the vibration characteristics of the real structure. Besides, this paper also presents the structural model updating in fine-tuning the model parameters utilizing the measured modal parameters (i.e., the natural frequencies and modes shapes). Modal Assurance Criteria (MAC) was adopted for solving the modes pairing problem before model updating was conducted. This paper provides valuable information and important experience in the practical applications of structural model updating techniques in the finite element modeling of real structural systems.",
keywords = "3D FE model, Ambient vibration, Class of models, Coupled slabs, MAC, Model modification",
author = "Peng, \{Hua Y.\} and Lam, \{Heung F.\}",
year = "2012",
language = "英语",
isbn = "9781922107619",
series = "Advances in Applied Mechanics Research, Conference Proceedings - 7th Australasian Congress on Applied Mechanics, ACAM 2012",
publisher = "National Committee on Applied Mechanics",
pages = "1003--1012",
booktitle = "Advances in Applied Mechanics Research, Conference Proceedings - 7th Australasian Congress on Applied Mechanics, ACAM 2012",
note = "7th Australasian Congress on Applied Mechanics, ACAM 2012 ; Conference date: 09-12-2012 Through 12-12-2012",
}