ONE DIMENSIONAL SITE RESPONSE ANALYSIS OF A POWER PLANT SITE BEFORE AND AFTER GROUND IMPROVEMENT
The purpose of this research is to measure amplification factor of a power plant site before and after ground improvement. Eight earthquakes with different frequency content (ChiChi, Coyote, Kobe, Loma Girloy, Nahani, Northridge, Mammoth, & Parkfield earthquakes) were selected to do the analysis....
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| Format: | Thesis |
| Idioma: | anglès |
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DEPARTMENT OF CIVIL ENGINEERING
2021
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| Accés en línia: | http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/625 |
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| _version_ | 1868227046527729664 |
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| author | DAS BRISTI, ANAN |
| author_browse | DAS BRISTI, ANAN |
| author_facet | DAS BRISTI, ANAN |
| author_sort | DAS BRISTI, ANAN |
| collection | DSpace |
| description | The purpose of this research is to measure amplification factor of a power plant site before
and after ground improvement. Eight earthquakes with different frequency content (ChiChi,
Coyote, Kobe, Loma Girloy, Nahani, Northridge, Mammoth, & Parkfield earthquakes) were
selected to do the analysis. The analyses were mainly based on shear wave velocity. Soil
parameters and other data were collected from the Power Plant Site. In this location Ground
Improvement was done by deep mixing with cement.
Soil model before ground improvement mainly considered as silty fine sand with shear wave
velocity of 160 m/s at ground level to 640 m/s at 120m depth. Similarly, after ground
improvement shear wave velocity was 1100 m/s at ground level to 640 m/s at 120m depth.
For estimating site amplification factor, computer program DEEPSOIL was used. With soil
layer depth, unit weight (γ) and shear wave velocity (Vs) as inputs, soil amplification by
equivalent linear analysis was estimated. Amplitude ratio versus frequency (Hz), Peak
Ground Acceleration (PGA) versus depth, Acceleration versus time, normalized Peak Surface
Acceleration (PSA) versus period were plotted both for the above two models.
After combining all the earthquakes, the mean value amplitude ratio decreased from almost
12 before ground improvement to 9 after ground improvement though the frequency was the
xv
same. PSA value decreased from 0.6 to 0.3 within the same period of time. We cannot find
any significant change in the normalized PSA value. After ground improvement the mean
PGA value of all the earthquakes decreased to 0.15g from 0.30g which is a significant
amount |
| format | Thesis |
| id | oai:localhost:123456789-625 |
| institution | My University |
| language | English |
| publishDate | 2021 |
| publishDateRange | 2021 |
| publishDateSort | 2021 |
| publisher | DEPARTMENT OF CIVIL ENGINEERING |
| publisherStr | DEPARTMENT OF CIVIL ENGINEERING |
| record_format | dspace |
| spelling | oai:localhost:123456789-6252021-09-30T06:40:02Z ONE DIMENSIONAL SITE RESPONSE ANALYSIS OF A POWER PLANT SITE BEFORE AND AFTER GROUND IMPROVEMENT DAS BRISTI, ANAN The purpose of this research is to measure amplification factor of a power plant site before and after ground improvement. Eight earthquakes with different frequency content (ChiChi, Coyote, Kobe, Loma Girloy, Nahani, Northridge, Mammoth, & Parkfield earthquakes) were selected to do the analysis. The analyses were mainly based on shear wave velocity. Soil parameters and other data were collected from the Power Plant Site. In this location Ground Improvement was done by deep mixing with cement. Soil model before ground improvement mainly considered as silty fine sand with shear wave velocity of 160 m/s at ground level to 640 m/s at 120m depth. Similarly, after ground improvement shear wave velocity was 1100 m/s at ground level to 640 m/s at 120m depth. For estimating site amplification factor, computer program DEEPSOIL was used. With soil layer depth, unit weight (γ) and shear wave velocity (Vs) as inputs, soil amplification by equivalent linear analysis was estimated. Amplitude ratio versus frequency (Hz), Peak Ground Acceleration (PGA) versus depth, Acceleration versus time, normalized Peak Surface Acceleration (PSA) versus period were plotted both for the above two models. After combining all the earthquakes, the mean value amplitude ratio decreased from almost 12 before ground improvement to 9 after ground improvement though the frequency was the xv same. PSA value decreased from 0.6 to 0.3 within the same period of time. We cannot find any significant change in the normalized PSA value. After ground improvement the mean PGA value of all the earthquakes decreased to 0.15g from 0.30g which is a significant amount 2021-09-30T06:39:59Z 2021-09-30T06:39:59Z 2020-06 Thesis http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/625 en application/pdf DEPARTMENT OF CIVIL ENGINEERING |
| spellingShingle | DAS BRISTI, ANAN ONE DIMENSIONAL SITE RESPONSE ANALYSIS OF A POWER PLANT SITE BEFORE AND AFTER GROUND IMPROVEMENT |
| title | ONE DIMENSIONAL SITE RESPONSE ANALYSIS OF A POWER PLANT SITE BEFORE AND AFTER GROUND IMPROVEMENT |
| title_full | ONE DIMENSIONAL SITE RESPONSE ANALYSIS OF A POWER PLANT SITE BEFORE AND AFTER GROUND IMPROVEMENT |
| title_fullStr | ONE DIMENSIONAL SITE RESPONSE ANALYSIS OF A POWER PLANT SITE BEFORE AND AFTER GROUND IMPROVEMENT |
| title_full_unstemmed | ONE DIMENSIONAL SITE RESPONSE ANALYSIS OF A POWER PLANT SITE BEFORE AND AFTER GROUND IMPROVEMENT |
| title_short | ONE DIMENSIONAL SITE RESPONSE ANALYSIS OF A POWER PLANT SITE BEFORE AND AFTER GROUND IMPROVEMENT |
| title_sort | one dimensional site response analysis of a power plant site before and after ground improvement |
| url | http://dspace.mist.ac.bd:8080/xmlui/handle/123456789/625 |
| work_keys_str_mv | AT dasbristianan onedimensionalsiteresponseanalysisofapowerplantsitebeforeandaftergroundimprovement |