International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 05 | May 2022
p-ISSN: 2395-0072
www.irjet.net
Ductility based seismic analysis of irregular RCC framed structure by using STAAD Pro. Neeraj Kumar1, Saurabh Lalotra2 Neeraj Kumar Department of civil engineering MTech Structure Designing Saurabh lalotra Assistant Professor, Department of Civil Engineering Sri Sai Group of Institute, Pathankot, Punjab ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - This paper is concerned with the ductility base seismic analysis of various irregular buildings and regular buildings. The objective of the project is to carry out seismic analysis on various RCC Buildings using staad Pro.Response Spectrum Analysis, Time History Analysis & Static Analysis has been done on various irregular and regular structures and compare the result & Behavior in various zones and find out the valuable outcomes. Key Words: Dynamic Analysis (Response Spectrum Analysis), Static Analysis, Time History Analysis, RCC structure, IS 13920 2016, IS 1893:2016.
1. INTRODUCTION The type of irregularity in the building structures is of various type , mass irregular, vertical irregular, stiffness irregular as per IS1893. When such buildings are constructed in high seismic zones, the analysis and design become more complicated and result may vary when we change the Zone. As we change the zone of irregular building compare the result compare the effect of seismic zone of that particular structure and compare the result
To carry out ductility-based seismic analysis and design as per IS 13920:2016 for various structure for various zones and compare the results. To carry out seismic design as per IS 1893:2016 corresponding to equivalent static analysis and time history analysis and to compare the difference in design.
2. METHODOLOGY The steps undertaken in the present study to accomplish the above-mentioned objectives are as follows:
Review of existing literatures /paper by different researchers
Selection of types of regular and irregular structures
Select a regular structure, Mass Irregular structure, stiffness irregular structure, and vertical irregular structure.
Performing analysis i.e. response spectrum analysis static analysis & Time history analysis on selected building models using STAAD.Pro V8i.
Detailed discussion on moment for various zone and structure and compare the result in form of chart.
1.1 objectives To calculate the Design lateral forces on following structures Using Response Spectrum Analysis, Time History Analysis and Equivalent Static Analysis and to compare the results of various irregular structures. Using STADD Pro V8i software
Seismic load/ combination is given as per IS 1893- 2016. Following assumptions are used for the calculation.
Regular buildings Vertical Irregular buildings Mass Irregular Building Stiffness Irregular Building To study the various irregularities in the following structures as per IS1893:2016 namely Mass Stiffness Vertical Geometry irregularities.
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Impact Factor value: 7.529
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Zone factor – 0.36 (Zone5)
Zone factor – 0.24(Zone4)
Zone factor – 0.16(Zone3)
Zone factor – 0.10(Zone2)
Soil type – 2 (Medium Stiff Soil)
Importance Factor -1
Response Reduction Factor – 5
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