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@article{206740,
        author = {Priyanka Shivaji Lokare and Prof. U.L.Deshpande and Prof.R.A.Chougale},
        title = {Analysis of Diaphragm Effect on Space Framed Structures},
        journal = {International Journal of Innovative Research in Technology},
        year = {2026},
        volume = {13},
        number = {2},
        pages = {2674-2681},
        issn = {2349-6002},
        url = {https://ijirt.org/article?manuscript=206740},
        abstract = {Diaphragm action is a critical mechanism controlling the seismic and wind response of steel buildings, long-span roof systems and space-framed structures. In conventional steel buildings, floor and roof diaphragms are generally treated as rigid, flexible or semi-rigid horizontal systems that collect lateral forces and transfer them to vertical lateral-load-resisting elements. However, in steel space framed structures, the interaction between three-dimensional member action and diaphragm stiffness is more complex because load transfer is distributed through interconnected members rather than through planar frames alone. This review critically synthesizes literature related to diaphragm behaviour, steel space frame action, conventional steel framing, seismic response parameters and numerical modelling assumptions. The paper highlights that rigid diaphragm assumptions may simplify design but can misrepresent actual behaviour in large-span, irregular or flexible roof/floor systems. Flexible and semi-rigid diaphragm modelling improves realism but requires careful definition of in-plane stiffness, joint connectivity and load-transfer paths. The review identifies gaps in comparative studies between steel space frames and conventional steel structures, limited validation of semi-rigid diaphragm models, and insufficient design-oriented guidance for large-span steel systems. Future work should integrate finite element validation, diaphragm stiffness calibration, nonlinear dynamic analysis and practical design recommendations for robust seismic performance of steel space-frame systems.},
        keywords = {steel space frame; diaphragm action; rigid diaphragm; flexible diaphragm; semi-rigid diaphragm; seismic analysis; conventional steel structure; lateral load resisting system; finite element modelling; STAAD. Ro.},
        month = {July},
        }