Analytical Evaluation of the Effect of Geometry and Local Configuration of Diagrid Structures on the Robustness Component of Seismic Resilience

Articles in Press
Authors
M. Khalajzadeh
S. Morshed-Shekarchi
A. Meshkat-Dini
A. Massumi
Kharazmi University
10.48311/mcej.2026.24047
Abstract
Diagrid structure is an extended resistant skeleton based on framed tube system which has been considered in high-rise buildings constructions due to its architectural aesthetics and configurational character. These general characteristics are demonstrated by reducing the consuming materials through removing columns and the application of a grid configuration of diagonal elements. The seismic behaviour of such a structure is affected by the configuration angle and the axial capacity of the diagonal members. With the dominance of axial function, the diagonal elements also resist lateral loads caused by wind and earthquake, and also play a key role in limiting the amplitude of inelastic behaviour. Therefore, the seismic performance of diagonal elements would reduce the process of formation and expansion of nonlinear zones in diagrid structures. According to the lack of guiding principles for the integrated design of diagrid structures, there is a high demand for extensive researches in collecting comprehensive and effective criteria for estimating stiffness and strength parameters, establishing dynamic stability and understanding how the resilience of these structures change due to dynamic loads caused by wind and earthquake.

In this study, the seismic performance of three 20-story studied diagrid buildings with the same structural system under a set of near-field records has been evaluated. The particular focus of this study is on evaluating the effect of the geometry and configuration of the resistant skeleton in the ground floor and the entrance section on the behavioural characteristics. In this paper, an analytical study has been run on the drift response parameter, the results of incremental dynamic analysis (IDA), fragility curve and the seismic resilience component under the selected earthquake records. The analytical results of this study show a close convergence between the behavioural characteristics of all three studied structures.

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Articles in Press, Accepted Manuscript
Available Online from 21 January 2026