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Velani, Pulkit Dilip
- Tremors and built environment of Hyderabad, Telangana, India: safety of buildings using recorded ground motions
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Authors
Affiliations
1 Earthquake Engineering Research Centre, International Institute of Information Technology, Hyderabad 500 032, IN
2 International Institute of Information Technology, Hyderabad 500 032, IN
1 Earthquake Engineering Research Centre, International Institute of Information Technology, Hyderabad 500 032, IN
2 International Institute of Information Technology, Hyderabad 500 032, IN
Source
Current Science, Vol 122, No 10 (2022), Pagination: 1174-1184Abstract
Although the city of Hyderabad in Telangana, India lies in seismic zone II, low to medium intensity tremors that pose a serious concern towards safety of the built environment are not uncommon. One such series of tremors occurred during 13–20 October 2020, in the financial district of Hyderabad and created a panic situation due to perceivable shaking and jolts with loud sounds associated with hydro-seismicity. To understand the safety of the city’s built environment, a study was conducted on low, medium and tall buildings using ground motions recorded at the International Institute of Information Technology (IIIT), Hyderabad, which is 2.3 km from the epicentre. The amplification of ground motion on the second floor of the Nilgiri Building in IIIT, Hyderabad was 1.2–2.3. The vibrations recorded on the ground floor of the Nilgiri Building were used to develop a site-specific response spectrum. This was further used to obtain the peak responses of the considered buildings through response spectrum analysis. The present study suggests that the low-rise buildings, mid-rise buildings and non-structural elements in high-rise buildings are under threat in the case of high-intensity earthquakesKeywords
Built environment, ground motion, hydroseismicity, microtremors.Full Text
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- Approximate Natural Period Expression for Reinforced Concrete Tall Buildings in India
Abstract Views :97 |
PDF Views:54
Authors
Affiliations
1 Earthquake Engineering Research Centre, International Institute of Information Technology, Hyderabad 500 032, IN
2 CSIR-Central Building Research Institute, Roorkee 247 667, IN
1 Earthquake Engineering Research Centre, International Institute of Information Technology, Hyderabad 500 032, IN
2 CSIR-Central Building Research Institute, Roorkee 247 667, IN
Source
Current Science, Vol 124, No 12 (2023), Pagination: 1412-1421Abstract
Many tall buildings are being constructed in different Indian cities to cater to the demand generated by the large number of people migrating from rural areas to urban centres. The safety of such tall buildings is ensured by designing them for dynamic loads, viz. wind and earthquake. To withstand these loads, computation of the natural period becomes essential. The current Indian seismic code IS 1893 (2016) has outlined a few empirical expressions based on different structural systems to compute the natural period. These expressions have been developed using data obtained from experiments performed on low to midrise buildings. Thus, verifying their applicability for tall structures before using them is important. To achieve this, in the present study ambient vibration testing was done on 28 reinforced concrete (RC) tall buildings in the Indian cities of Hyderabad and Mumbai, whose heights ranged from 50 to 150 m. These tests’ natural periods were compared with existing Indian and international codes. Based on the comparison, a novel empirical expression of RC tall buildings is proposed here.Keywords
Ambient Vibration, Dynamic Loads, Fundamental Natural Period, Seismic Codes, Tall Building.Full Text
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