Seismic Evaluation Of Tube In Tube Structures : An Article Review | ||||
| The Egyptian International Journal of Engineering Sciences and Technology | ||||
| Articles in Press, Accepted Manuscript, Available Online from 31 July 2025 | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/eijest.2025.393063.1342 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Heba Salem  1; Hilal Hassan2; Mahmoud Abd El Hamid3; Wadid William4
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| 1civil Engineering ,Faculty of Engineering, Zagazig University, Zagazig ,Egypt | ||||
| 2Structural Engineering, Zagazig University, Zagazig , Egypt. | ||||
| 3Structural Engineering, Zagazig University, Zagazig, Egypt; | ||||
| 4Structural Engineering, Zagazig University, Zagazig , Egypt; | ||||
| Abstract | ||||
| Tube-in-tube structures have become a preferred solution for high-rise buildings in seismically active regions due to their efficient lateral load resistance and structural redundancy. However, their complex behavior under earthquake loading, especially in irregular configurations, requires seismic evaluation. This review paper presents a comprehensive analysis of previous research on the seismic performance of tube-in-tube systems, with a focus on nonlinear static pushover analysis as the primary evaluation method. The tube-in-tube system consists of a central shear core and perimeter moment-resisting frames, providing high lateral stiffness and energy dissipation capacity. Both regular and irregular configurations are evaluated, focusing on how geometric and structural irregularities influence seismic behavior and failure mechanisms. Key parameters discussed include the core-to-frame stiffness ratio, plan and vertical irregularities, mass eccentricities, and plastic hinge distribution. These factors strongly influence lateral load resistance, ductility, and overall structural performance. Research indicates that regular tube-in-tube systems generally exhibit stable and ductile responses with limited stiffness degradation. In contrast, irregular configurations are more vulnerable to early stiffness loss and localized failures, emphasizing the importance of advanced seismic design strategies to enhance structural resilience. | ||||
| Keywords | ||||
| High-rise buildings; Regular structures; Irregular structures; pushover analysis | ||||
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