Research PaperNo Access

Effects of Slenderness and Fundamental Frequency on the Dynamic Response of Adjacent Structures

Department of Civil and Environmental Engineering, The University of Auckland, 20 Symonds St, Auckland 1010, New Zealand

E-mail Address: gbar737@aucklanduni.ac.nz

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Vinuka Nanayakkara

Department of Civil and Environmental Engineering, The University of Auckland, 20 Symonds St, Auckland 1010, New Zealand

E-mail Address: vnam240@aucklanduni.ac.nz

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Pramodya De Alwis

Department of Civil and Environmental Engineering, The University of Auckland, 20 Symonds St, Auckland 1010, New Zealand

E-mail Address: pdea717@aucklanduni.ac.nz

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, and

Nawawi Chouw

Department of Civil and Environmental Engineering, The University of Auckland, 20 Symonds St, Auckland 1010, New Zealand

E-mail Address: n.chouw@auckland.ac.nz

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https://doi.org/10.1142/S0219455419501050Cited by:12 (Source: Crossref)

Abstract

In conventional seismic design, the structure is often assumed to be fixed at the base. However, this assumption does not reflect reality. Furthermore, if the structure has close neighbors, the adjacent structures will alter the response of the structure considered. Investigations on soil–structure interaction and structure–soil–structure interaction have been performed mainly using numerical models. The present work addresses the dynamic response of adjacent single-degree-of-freedom models on a laminar box filled with sand. Impulse loads and simulated ground motions were applied. The standalone condition was also studied as a reference case. Models with different fundamental frequencies and slenderness were considered. Results from the impulse tests showed that the top displacement of the models with an adjacent structure was reduced compared with that of the standalone case. Changes in the fundamental frequency of the models due to the presence of an adjacent model were also observed. Results from ground motions showed amplification of the maximum acceleration and the top displacement of the models when both structures have a similar fundamental frequency.

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