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

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.

Effect of Structure Height on Seismic Response of Adjacent Structures Considering Soil-Structure Interaction

“…To summarize, this outcome is compatible with the study finding of Aldaikh et al [4], which indicated that a structure seems to experience the most unfavorable interaction influence when bounded by one or two higher buildings by about 10%. This result also agrees with the result of Barrios et al [7], which showed that whenever the slenderness increases, the resulting acceleration increases also. Figure 6 compares the building top displacement response of a three-story building against adjacent buildings with different heights.…”

“…Kirkwood and Dashti [6] characterized how the building disengagement and ground motion features influence the reaction of adjacent structures founded on a layered, liquefiable soil profile. The dynamic counter actions of adjacent single-degree-of-freedom models were examined by Barrios et al [7] using a laminar box filled with sand. For the dynamic excitation, they executed impulse loads and simulated ground motions.…”

Experimental study of the seismic response of a structure set amongst closely adjacent structures

“…Consequently, the entire system behaved elastically, and also footing uplift was not possible. Barrios et al 26 studied the response of two adjacent structures on sand using a small shake table and a flexible soil container. An impulse load and simulated ground motions were considered.…”

Dynamic structure-soil-structure interaction of piled high-rise buildings under earthquake excitations I: Influence on dynamic response

“…While the SSI deals with the interaction between individual structures and their underlying soil, the DCI is concerned with the throughthe-soil interaction between adjacent structures within a structure cluster. The SSSI is one of the branches of the SSI, and as a natural protraction, research techniques, including analytical [3][4][5][6][7][8][9][10] , numerical [11][12][13][14][15] and experimental [16][17][18][19][20] methods, that are implemented to investigate the SSSI are similar to those employed in SSI analyses [2] . A real or complete SSI analysis must take into account the possible consideration of interactions with adjacent structures.…”

“…Ngo et al [16,58] conducted geotechnical centrifuge tests to investigate the SSSI effects on silica sand, while Hayden et al [59] and Kirkwood et al [18,60] also conducted geotechnical centrifuge tests to investigate the SSSI effects on liquefiable deposits. Barrios et al [17] and Li et al [19] used shaking table tests to examine the SSSI. Gueguen et al [61] applied instrumental records and feild reports to analyze the SSSI after an earthquake.…”