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Evaluation of Constant Ductility Displacement Response Spectra for Near-fault Ground Motions of the 1999 Chi-Chi Earthquake, Taiwan


Affiliations
1 Department of Civil Engineering, Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal 518 501, India
2 Department of Civil Engineering, Mahindra University, Hyderabad 500 043, India

This study evaluates the constant ductility displacement response spectra (CDDRS) for near-fault ground motions (NFGMs) of the 1999 Chi-Chi earthquake in Taiwan. The complex source mechanism was mainly caused by a rupture on the Chelungpu fault that spanned about 100 km. A dataset of 63 NFGM records was considered to understand the effects of CDDRS due to hanging wall, foot wall and directivity effects. CDDRS were generated using SeismoSignal tool for the selected ground motions. Significant variation was observed in both elastic and inelastic CDDRS for tall buildings due to the hanging wall effect. In addition, variations in the inelastic spectra were found to be more prominent due to the backward directivity effect. Moreover, the inelastic displacement spectral values for pulse-like ground motions were much higher than those associated with non-pulse ground motions.

Keywords

Constant ductility response spectra, earthquakes, forward and backward rupture, near-fault ground motions, seismic hazard
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  • Evaluation of Constant Ductility Displacement Response Spectra for Near-fault Ground Motions of the 1999 Chi-Chi Earthquake, Taiwan

Abstract Views: 95  | 

Authors

Konkula Rama Neeraja
Department of Civil Engineering, Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal 518 501, India
Faisal Mehraj Wani
Department of Civil Engineering, Mahindra University, Hyderabad 500 043, India
Chereddy Navyatha
Department of Civil Engineering, Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal 518 501, India
Jaya Prakash Vemuri
Department of Civil Engineering, Mahindra University, Hyderabad 500 043, India
Chenna Rajaram
Department of Civil Engineering, Rajeev Gandhi Memorial College of Engineering and Technology, Nandyal 518 501, India

Abstract


This study evaluates the constant ductility displacement response spectra (CDDRS) for near-fault ground motions (NFGMs) of the 1999 Chi-Chi earthquake in Taiwan. The complex source mechanism was mainly caused by a rupture on the Chelungpu fault that spanned about 100 km. A dataset of 63 NFGM records was considered to understand the effects of CDDRS due to hanging wall, foot wall and directivity effects. CDDRS were generated using SeismoSignal tool for the selected ground motions. Significant variation was observed in both elastic and inelastic CDDRS for tall buildings due to the hanging wall effect. In addition, variations in the inelastic spectra were found to be more prominent due to the backward directivity effect. Moreover, the inelastic displacement spectral values for pulse-like ground motions were much higher than those associated with non-pulse ground motions.

Keywords


Constant ductility response spectra, earthquakes, forward and backward rupture, near-fault ground motions, seismic hazard



DOI: https://doi.org/10.18520/cs%2Fv126%2Fi7%2F837-847