Conference Papers
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Item Seismic Performance of Infilled RC Frames by Pseudo-Optimization Method(Springer Science and Business Media Deutschland GmbH, 2023) Priyusha, G.; Shreyasvi, C.; Venkataramana, K.In the present situation, most of the structures are made of Reinforced Concrete (RC) because of readily available raw materials, expertise, and most cost-effective construction. Any building/infrastructure located in seismic zone III or higher has to follow the ductile detailing procedure outlined by IS 13920 (2016) to resist the seismic effects. As earthquakes are highly unpredictable, it is the role of the structural engineer to take care of seismic effects while designing a multi-storey building. The main concept behind earthquake resistant design of structures is to utilize the ductile capability of the materials and the structural members. However, the linear behavior cannot capture the performance of the structure beyond its yield limit and hence, nonlinear analysis is commonly used. On the other hand, nonlinear analysis can be computationally expensive and time-consuming. Hence, the objective of the present study is to optimize the analysis and seismic design by applying pseudo optimization technique. The technique makes use of existing linear structural analysis models with some improvements in the design process based on modal energy. The pseudo optimized design is a three-step procedure that is cost-effective and time-saving. It can be easily implemented by practitioners in their structural design without much of a disruption in the existing workflow. In the current research, finite element model based structural analysis software is used to model and analyze the building. To evaluate its seismic performance pushover analysis is done. The study highlights the merits of the pseudo optimization technique through the application of the methodology. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.Item Studies on Seismic Performance of RC Framed Buildings Using Pseudo-optimization Method(Springer Science and Business Media Deutschland GmbH, 2024) Priyusha, G.; Shreyasvi, C.; Venkataramana, K.Most of the RC framed buildings which are designed for seismic prone regions have to follow the ductile detailing procedure outlined in earthquake resistant design code IS 13920(2016) while the infill wall in the RC frames must follow the procedure outlined in IS 1893 (Part 1): 2016. Earthquake resistant design aims to completely utilize the ductile behaviour of the members and it’s constituent materials. Nonlinear analysis is frequently used to explore the ductile behaviour of the structure which is visible only beyond the yield limit/the linear range of the material behaviour. However, nonlinear dynamic analysis can be time consuming and resource intensive. Therefore, the goal of the present study is to utilise the material strength to full potential while keeping the analysis simple and robust. Hence, a pseudo optimization technique was adopted to improve the existing analysis and seismic design methods. The adopted method employs linear models of a structure whose seismic design has been enhanced and optimised based on modal energy. The pseudo-optimized design is a three-step process. The first step is to perform Pushover analysis to evaluate the seismic capacity of the existing building. In the next step, the variation of storey stiffness, storey strength and modal energy shall be examined along the height of the building considering the in-plane stiffness and strength of unreinforced masonry (URM) infill walls. As a last step, based on the modal energies observed in various structural members, the design is optimised. This method is practitioner friendly and has potential for industry level applications. © 2023, Springer Science and Business Media Deutschland GmbH. All rights reserved.