Mirzaei, Ebrahim, Tavousi Tafreshi, Shahriar, Forootan, Farrokh. (1405). Study of the Effect of Soil-Pile-Structure Interaction on the Seismic Response of Steel Diagonal Grid Structures with Emphasis on Soil Liquefaction Phenomenon. هنرهای کاربردی, 14(2), -. doi: 10.22075/jrce.2025.2363
Ebrahim Mirzaei; Shahriar Tavousi Tafreshi; Farrokh Forootan. "Study of the Effect of Soil-Pile-Structure Interaction on the Seismic Response of Steel Diagonal Grid Structures with Emphasis on Soil Liquefaction Phenomenon". هنرهای کاربردی, 14, 2, 1405, -. doi: 10.22075/jrce.2025.2363
Mirzaei, Ebrahim, Tavousi Tafreshi, Shahriar, Forootan, Farrokh. (1405). 'Study of the Effect of Soil-Pile-Structure Interaction on the Seismic Response of Steel Diagonal Grid Structures with Emphasis on Soil Liquefaction Phenomenon', هنرهای کاربردی, 14(2), pp. -. doi: 10.22075/jrce.2025.2363
Mirzaei, Ebrahim, Tavousi Tafreshi, Shahriar, Forootan, Farrokh. Study of the Effect of Soil-Pile-Structure Interaction on the Seismic Response of Steel Diagonal Grid Structures with Emphasis on Soil Liquefaction Phenomenon. هنرهای کاربردی, 1405; 14(2): -. doi: 10.22075/jrce.2025.2363

Study of the Effect of Soil-Pile-Structure Interaction on the Seismic Response of Steel Diagonal Grid Structures with Emphasis on Soil Liquefaction Phenomenon

Journal of Rehabilitation in Civil Engineering
دوره 14، شماره 2 - شماره پیاپی 42، تابستان 2026
نوع مقاله: Regular Paper
شناسه دیجیتال (DOI): 10.22075/jrce.2025.2363
نویسندگان
Ebrahim Mirzaei1؛ Shahriar Tavousi Tafreshi* 2؛ Farrokh Forootan2
1Ph.D. Candidate, Department of Civil Engineering, CT.C., Islamic Azad University, Tehran, Iran
2Assistant Professor, Department of Civil Engineering, CT.C., Islamic Azad University, Tehran, Iran
چکیده
The transition from internal frame structures to external systems like diagonal grids has enhanced both shear resistance and aesthetic value in tall buildings. These external systems effectively distribute load-bearing elements around the perimeter, utilizing triangular grid networks to optimize structural and architectural performance. However, a significant challenge in seismic regions is the liquefaction of loose sandy soils, which can cause severe settlement and lateral displacement. This research examines steel diagonal grid structures, focusing on soil-pile-structure interaction and liquefaction effects. A symmetric four-story model was developed using SAP2000 and modeled nonlinearly in OpenSees, incorporating near-field and far-field soil domains, piles, and structural elements. Results indicate that longer piles (28-30 meters) with diameters over 1.2 meters reduce roof displacement by up to 42%, while increasing shear forces and bending moments within the piles, maintaining foundation rotation within acceptable limits (less than 0.002 radians). In contrast, shorter piles (12 meters) decrease shear and axial forces but lead to increased roof displacement and inter-story drift, with increases up to 43%. Notably, under liquefaction, these shorter piles show a relative drift reduction of up to 62%. The findings stress the importance of a balanced design approach that considers both structural displacements and internal stresses, advocating for the integration of geotechnical and structural factors in seismic design for innovative systems like diagrids. Recommendations include refining design codes to impose specific limitations on pile dimensions to address nonlinear liquefaction effects.

تازه های تحقیق
  • Liquefaction increases lateral displacement and pile bending stress in diagrid structures.
  • Deep piles reduce roof drift by 42% but raise shear force and bending moments.
  • Short piles reduce internal forces but increase displacement and inter-story drift.
  • First-time FEM analysis of liquefaction impact on diagrid structures' seismic behavior.
کلیدواژه‌ها
Soil-pile-structure interaction؛ Diagonal grid steel structure؛ Seismic response؛ Liquefaction of soil
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