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  Volume 6, Number 4, October 2021 , pages 279-299
DOI: https://doi.org/10.12989/acd.2021.6.4.279
 

Static and seismic response analyses of new seismic integrated ceiling using FEM
Zhilun Lyu, Masakazu Sakaguchi, Tomoharu Saruwatari and Yasuyuki Nagano

 
Abstract
    The seismic performances of suspended ceilings are mostly evaluated via shaking table tests, whose results can be intuitively understood. However, these tests become impracticable when the ceiling surface area is beyond the limit of the shake table. Hence, simulation analysis becomes an alternative method. However, simulation analysis for suspended ceilings has not been yet developed and is used as an auxiliary method. To provide a new approach for evaluating the seismic performances of suspended ceilings, we have proposed numerical models for a new seismic integrated ceiling in previous studies, including 1) models (shell elements) for the intersections of the ceiling members and 2) models (beam elements) for ceiling units. Based on our previous studies, we created a model with a ceiling surface area of 264 m2 and analyzed via LS-DYNA as an example to evaluate the seismic performance of the new seismic integrated ceiling. To confirm the seismic behavior of the new seismic integrated ceiling during earthquakes, as an example, JMA Kobe earthquake waves were input into the simulation model for the first time. Via the simulation analysis, it was confirmed that the seismic performance of the new seismic integrated ceiling was satisfactory even when the ceiling surface area exceeded 200 m2.
 
Key Words
    integrated ceiling; numerical model; seismic ceiling; seismic evaluation; simulation analysis; suspended ceiling
 
Address
Zhilun Lyu:Okuju Corporation, 5-3-7 Nishitemma, Kita-Ku 530-0047, Osaka, Japan

Masakazu Sakaguchi:Asahibuilt Industry, Corporation Limited, 4-32-8, Kamatahommachi, Otaku 144-0052, Tokyo, Japan

Tomoharu Saruwatari:JSOL Corporation, 2-2-4 Tosabori, Nishi-Ku 550-0001, Osaka, Japan

Yasuyuki Nagano:Graduate School of Information Science, University of Hyogo, 7-1-28, Minatojima-minamimachi,
Chuo-Ku 650-0047, Kobe, Japan
 

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