Title: Effects of separation joints on dynamic characteristics of adjacent structures based on ambient vibration tests

Authors: Pei Liu; Hai-Xin Zhu; Shu-Qiang Huang; Wei-Guo Yang

Addresses: School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China ' School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China ' School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China ' School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China

Abstract: Adjacent structures separated by a joint of a building are usually taken as independent ones by design engineers. However, the separation joint may provide some continuity to the real building. This paper studies the effects of the separation joint on the dynamic characteristics of three cases of multi-storey adjacent structures. Both ambient vibration tests and finite element modelling have been carried out for this purpose. Close modes are identified in all three cases by the fast Bayesian FFT method. Dynamic interactions between the adjacent structures via the separation joint are noted. The extent of dynamic interactions depends largely on the technical details of the joint. The natural frequencies and mode shapes identified from the field vibration tests and estimated using the calibrated finite element models considering the separation joint are found to be in good agreement.

Keywords: ambient vibration; separation joint; modal parameter; dynamic interaction; adjacent structures.

DOI: 10.1504/IJLCPE.2018.094882

International Journal of Lifecycle Performance Engineering, 2018 Vol.2 No.3/4, pp.223 - 246

Received: 02 Apr 2018
Accepted: 17 Jun 2018
Published online: 25 Sep 2018 *

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