Studying the damping characteristics of the system of building and infrastructure considering the Soil-Structure Interaction

Duong Hong Tham ()
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Duong Hong Tham: Ho Chi Minh City Open University, Ho Chi Minh City, Vietnam

HO CHI MINH CITY OPEN UNIVERSITY JOURNAL OF SCIENCE - ENGINEERING AND TECHNOLOGY, 2022, vol. 12, issue 2, 99-110

Abstract: This paper studies the damping characteristics of the soil foundation under a building concerning the Soil-Structure Interaction (SSI). By considering a multi-story building resting on a piled raft foundation as a typical SSI system, subjected to an earthquake (i.e., Chi Chi earthquake, Taiwan 1999), the time-dependent responses of specified locations in the foundation are recorded and analyzed, both in-time domain and frequency domain. Referring to prior knowledge about system identification and damping, this study suggests an overwhelming approach to determining the damping ratio for analyzing more thoroughly a system of SSI systems. Results are a general procedure to establish the damping matrix, namely the Caughey damping matrix which takes several frequencies into account. A different viewpoint that the connection of superstructure and infrastructure in series could help to estimate the damping, and contribute to a wide range of system identification. All these procedures are used to predict more properly the damping characteristics of a system of structures. Suggestions over the findings would be expected to contribute a more rigorous component to the analysis of high-rise buildings in the future.

Keywords: caughey damping ratios; least square method; measured data; Soil-Structure Interaction (SSI); system identification (search for similar items in EconPapers)
Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:bjw:techen:v:12:y:2022:i:2:p:99-110

DOI: 10.46223/HCMCOUJS.tech.en.12.2.2480.2022

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