Abstract
In seismic response investigation, shear wave velocity, Vs shows a vigorous role as an input factor. Enormous methodologies have been developed and tested to directly determine this key factor. Direct measurement of V<sub>s </sub>is time-consuming as well as highly expensive. As a result, researchers from different regions have tried to reduce the difficulties associated with the measurement and developed empirical relationships between V<SUB>S</SUB> and other geotechnical characteristics of the soil, such as SPT calculation, depth, vertical effective pressure, etc. In this paper, the empirical correlation between shear wave velocity and standard penetration number (SPT-N) has been investigated for several soil categories: all soils, sand, silt and clay-type soils. Study area selected for this analysis are Bagha, Bagmara, Charghat, Durgapur, Godagari, Paba, Puthia, Tanore and Rajshahi City Corporation (RCC) area consisting of 36 borehole dataset. Combining all the data, an approach is made to correlate the Vs with the SPT-N. The square value of the coefficient (R<sup>2</sup>) of correlation shows good agreement with the subsoil. Regression analysis is used to propose an empirical relation for this zone which would be helpful for foundation engineers to have the idea on earthquake response analysis of subsoil.
Highlights
Shear wave velocity (Vs) is the significant parameter for the dynamic characterization and analysis of subsurface
A set of correlation equations between standard penetrations tests (SPT-N values) and shear wave velocity (Vs) for different groups of soils is established for Rajshahi district, Bangladesh
Empirical correlations have been used worldwide but before using it should be checked against validation because these equations are site dependent and some researchers have tried to formulate the equations which may be applicable for all region [1, 2]. This analytical research deals with the development of empirical correlations between Vs and standard penetration number (SPT-N) for different upazillas of Rajshahi and for Rajshahi District (RD) collecting four borehole profile from each Upazila, a total of 36 borehole profile
Summary
Shear wave velocity (Vs) is the significant parameter for the dynamic characterization and analysis of subsurface. A set of correlation equations between standard penetrations tests (SPT-N values) and shear wave velocity (Vs) for different groups of soils is established for Rajshahi district, Bangladesh. Empirical correlations have been used worldwide but before using it should be checked against validation because these equations are site dependent and some researchers have tried to formulate the equations which may be applicable for all region [1, 2]. This analytical research deals with the development of empirical correlations between Vs and SPT-N for different upazillas of Rajshahi and for Rajshahi District (RD) collecting four borehole profile from each Upazila, a total of 36 borehole profile
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