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The IUP Journal of Structural Engineering

Seismic Response Analysis of RC Silo Under the Influence of Soil-Structure Interaction

Article Details

Pub. Date	: April, 2022
Product Name	: The IUP Journal of Structural Engineering
Product Type	: Article
Product Code	: IJSE020422
Author Name	: Rutuja Gadivaddar and M Manjunath
Availability	: YES
Subject/Domain	: Science and Technology
Download Format	: PDF Format
No. of Pages	: 16

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Abstract

RC silos are permanent storage structures built and used for storing bulk materials in many industries. They require less maintenance as they have high water resistance and protect the stored materials from moisture. Nowadays, for high-rise structures resting on relatively soft soils, the effect of Soil-Structure Interaction (SSI) has become prominent as it makes a structure more flexible. In the study, an analysis of unbraced and braced RC silo with three different height-to-diameter ratios, viz., 2, 2.5 and 3, is carried out in STAAD Pro V8i software, using equivalent static method as per IS:1893 (2002), to study its behavior under the influence of SSI in different seismic zones for various soil types. The parameters considered for the study are base shear, displacement and natural period. The results indicate that as compared to non-SSI, there is a reduction in base shear values, whereas displacement and natural period values are greater in SSI case for both braced and unbraced RC silos.

Description

Silos are permanent storage structures built and used for storing bulk materials. Many industries require containers of different sizes, shapes and materials for storing powdery and granular materials. So, silos are constructed to store a large quantity of materials as they protect against moisture and water tightness. Concrete is comparatively free from buckling and also from getting damaged. Also, it protects the stored material and has high water resistance. Therefore, RC silos require less maintenance. Due to its reasonable cost and design, RC silo is an economical unit of storage. An elevated RC silo comprises cylindrical shell, conical roof and hopper, which is supported by RCC columns and frames. It is a cantilever structure subjected to unconventional loadings. The types of loads acting on storage structures are dead load, seismic load, wind load, etc.

Soil-Structure Interaction (SSI) is the process in which the response of soil influences the motion of structure and vice versa. The effect of this interaction becomes