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Dynamic Response of RCC Silo in Seismic Zone V

Author(s):

Sonali Sunil Patil , , S. K. N. College of Engineering, Korti, Pandharpur ,India; Prof Y. P. Pawar, , S. K. N. College of Engineering, Korti, Pandharpur ,India; Prof. S. S. Kadam, , S. K. N. College of Engineering, Korti, Pandharpur ,India

Keywords:

Silo, Plates, Surface, Natural Frequency, Time Period, Displacement and STAAD. ProV8i

Abstract

A silo is a tall and big (heavy) structure for storing bulk materials. Silos are used in agriculture to store grains. These are more commonly used to store coal, fly ash, cement, carbon black, woodchips, ore, crushed stone, gravel, food products and sawdust. Silos are special structures subjected to different static and dynamic loading conditions, which cause unusual failure modes. Janseen’s theory is used for pressure calculation in static condition and theoretical approach for calculation of additional pressure due to seismic action. The standards viz. ARE 1893-2002may be used for comparison of “Base Shear Force” at the bottom of a Silo. The calculation is based on respective codal provisions applicable to Indian Seismic Zones, Site Conditions, etc. Nonetheless, a thorough investigation is required to know the structural behavior of the silo under seismic loading for proper design and improved performance. Linear dynamic analysis is done using software STAAD.Pro V8i as per IS 1893(Part I):2002. The Indian Standard “IS: 4995 (Part-I)-1974” is preferably used to assess the silo for angle of internal friction and bulk density of various materials stored in. Badly designed silos have buckled and unexpectedly collapsed due to earthquakes. Structural response to earthquakes is a dynamic phenomenon that depends on dynamic characteristics of structures and the intensity, duration and frequency content of the exciting ground motion. In the present work, dynamic analysis of a typical silo is done for earthquake Zone V as per Indian code. Two distinct analyses are carried out namely, Equivalent Static Analysis (ESA) and Response Spectrum Analysis (RSA) using STAAD.Pro V8i software. The Load combinations are considered as per Indian code. The results in terms of Fundamental natural period, Natural Frequency, lateral Displacements are compared for the different silo models considered in the present study.

Other Details

Paper ID: IJSRDV7I50054
Published in: Volume : 7, Issue : 5
Publication Date: 01/08/2019
Page(s): 10-14

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