Pushover Analysis of Irregular Steel Structure with Varying Irregularity Ratios

B. Jayaram Nayak, Kiran Kamath

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationSustainability Trends and Challenges in Civil Engineering - Select Proceedings of CTCS 2020
EditorsLakshman Nandagiri, M.C. Narasimhan, Shriram Marathe, S.V. Dinesh
PublisherSpringer Science and Business Media Deutschland GmbH
Pages395-414
Number of pages20
ISBN (Print)9789811628252
DOIs
Publication statusPublished - 2022
EventInternational Conference on Civil Engineering Trends and Challenges for Sustainability, CTCS 2020 - Karkala, India
Duration: 22-12-202023-12-2020

Publication series

NameLecture Notes in Civil Engineering
Volume162
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565

Conference

ConferenceInternational Conference on Civil Engineering Trends and Challenges for Sustainability, CTCS 2020
Country/TerritoryIndia
CityKarkala
Period22-12-2023-12-20

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

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