TY - GEN
T1 - Pushover Analysis of Irregular Steel Structure with Varying Irregularity Ratios
AU - Jayaram Nayak, B.
AU - Kamath, Kiran
N1 - Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
PY - 2022
Y1 - 2022
N2 - In this paper, the seismic performance of irregular steel structure with varying irregularity ratio has been investigated. For the study purpose, two different models with vertical geometric irregularity and three different models with plan irregularity according to IS 1893 (part 1)-2002 have been considered. The irregularity ratio, A/L (where A is offset, and L is base width), has been varied from 0.2 to 0.8. Irregular structures have been modelled using ETABS, a finite element software, and plastic hinges are assigned to incorporate the inelastic seismic behaviour of structures. Performance of thirteen irregular structures has been compared with regular bare frame structure in terms of base shear carrying capacity, roof displacement and performance point, using pushover analysis. Two slab models with shell element and membrane element considered for all structural models. The results indicate that as irregularity ratio increases, base shear carrying capacity and performance point of irregular structure decrease. Structural models considered slab as shell obtained higher seismic performance compared to slab as membrane.
AB - In this paper, the seismic performance of irregular steel structure with varying irregularity ratio has been investigated. For the study purpose, two different models with vertical geometric irregularity and three different models with plan irregularity according to IS 1893 (part 1)-2002 have been considered. The irregularity ratio, A/L (where A is offset, and L is base width), has been varied from 0.2 to 0.8. Irregular structures have been modelled using ETABS, a finite element software, and plastic hinges are assigned to incorporate the inelastic seismic behaviour of structures. Performance of thirteen irregular structures has been compared with regular bare frame structure in terms of base shear carrying capacity, roof displacement and performance point, using pushover analysis. Two slab models with shell element and membrane element considered for all structural models. The results indicate that as irregularity ratio increases, base shear carrying capacity and performance point of irregular structure decrease. Structural models considered slab as shell obtained higher seismic performance compared to slab as membrane.
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U2 - 10.1007/978-981-16-2826-9_26
DO - 10.1007/978-981-16-2826-9_26
M3 - Conference contribution
AN - SCOPUS:85115249953
SN - 9789811628252
T3 - Lecture Notes in Civil Engineering
SP - 395
EP - 414
BT - Sustainability Trends and Challenges in Civil Engineering - Select Proceedings of CTCS 2020
A2 - Nandagiri, Lakshman
A2 - Narasimhan, M.C.
A2 - Marathe, Shriram
A2 - Dinesh, S.V.
PB - Springer Science and Business Media Deutschland GmbH
T2 - International Conference on Civil Engineering Trends and Challenges for Sustainability, CTCS 2020
Y2 - 22 December 2020 through 23 December 2020
ER -