ItemArticle

Strain energy based frequency independent impedances of soil for interaction effect on structure

Title
Strain energy based frequency independent impedances of soil for interaction effect on structure
Creator
Gullapalli, Venkata Lakshmi; Kumar, Raghunandan R.; Reddy, G.R.
Description
The present study proposes a strain energybased method for evaluating soilstructure interaction (SSI) effects for ground-mounted parabolic antenna systems founded on layered soils. Conventional frequency-independent impedance formulations, such as those recommended in ASCE 4-16, are primarily based on homogeneous soil assumptions and may not adequately capture the dynamic behavior of layered soil profiles. In this work, a strain energy equivalence approach is developed to estimate translational and rotational soil impedances by accounting for depth-wise variations in soil stiffness. The proposed method is validated using three-dimensional finite element modeling and in-situ microtremor measurements. The results demonstrate improved prediction of natural frequencies and modal mass participation factors compared to standard impedance-based approaches, indicating that the proposed method provides a more realistic representation of SSI effects for precision-sensitive antenna structures. 2026 Techno-Press, Ltd.
Source
Geomechanics and Engineering;Volume;44;Issue;5;pp.697-720
Date
01-01-2026
Publisher
Techno-Press
Subject
microtremor test; natural frequency; parabolic antenna; soil impedance; soilstructure interaction; strain energy principle
Coverage
Gullapalli V.L., Department of Civil Engineering, CHRIST University, Karnataka, Bangalore, India; Kumar R.R., Department of Civil Engineering, CHRIST University, Karnataka, Bangalore, India; Reddy G.R., Department of Structural Engineering, VNIT, Maharashtra, Nagpur, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 2005307X;
Format
online
Language
English
Type
Article

Citation

Gullapalli, Venkata Lakshmi; Kumar, Raghunandan R.; Reddy, G.R., “Strain energy based frequency independent impedances of soil for interaction effect on structure,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 20, 2026, https://archives.christuniversity.in/items/show/23218.

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