METAHEURISTIC OPTIMUM SEISMIC DESIGN OF STEEL MOMENT FRAMES CONSIDERING CONNECTION TOPOLOGY AND SOIL-STRUCTURE INTERACTION

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Tezin Türü: Doktora

Tezin Yürütüldüğü Kurum: Karadeniz Teknik Üniversitesi, Fen Bilimleri Enstitüsü, İnşaat Mühendisliği, Türkiye

Tezin Onay Tarihi: 2025

Tezin Dili: İngilizce

Öğrenci: JAY PRAKASH JAY PRAKASH

Danışman: Ayşe Daloğlu

Özet:

In this study, the impact of connection topology and soil-structure interaction on the optimal design of steel space frameworks is investigated. To introduce seismic load in the MRSF structures, horizontal lateral load is applied to the floors of the steel frames using the equivalent lateral load method. A comprehensive three-parameter elastic soil model is employed to examine soil's effects. The teaching-learning-based optimization (TLBO) and particle swarm optimization (PSO) are utilized in the optimization process. The optimization process includes stress and strength limitations as specified in the AISC-ASD and AISC-LRFD rules, serviceability, and geometric restrictions. A software developed using the C# programming language implements metaheuristic algorithms. The software interfaces with SAP2000 using the Open Application Programming Interface (OAPI). The method's efficacy is illustrated by analyzing various examples and substantiated by existing literature findings. The results indicate that the configuration of connections and the interaction between the framework and the soil substantially impact the response of structural elements, ultimately increasing the frame's overall weight.