A topology optimization formulation is developed to find the stiffest structure with desirable material distribution subjected to seismic loads. Finite element models of the structures are generated and the optimality...A topology optimization formulation is developed to find the stiffest structure with desirable material distribution subjected to seismic loads. Finite element models of the structures are generated and the optimality criteria method is modified using a simple penalty approach and introducing fictitious strain energy to simultaneously consider both material volume and displacement constraints. Different types of shear walls with/without opening are investigated. Additionally, the effects of shear wall-frame interaction for single and coupled shear walls are studied. Gravity and seismic loads are applied to the shear walls so that the definitions provide a practical approach for locating the critical parts of these structures. The results suggest new viewpoints for architectural and structural engineering for placement of openings.展开更多
The present study uses the finite element method for simulating the crustal deformation due to the dislocation of a segment of the North-Tehran fault located in the Karaj metropolis region.In this regard,a geological ...The present study uses the finite element method for simulating the crustal deformation due to the dislocation of a segment of the North-Tehran fault located in the Karaj metropolis region.In this regard,a geological map of Karaj that includes the fault segment is utilized in order to create the geometry of finite element model.First,finite element analysis of homogeneous counterpart of the fault’s domain with two different sections was performed,and the results were compared to those of Okada’s analytical solutions.The fault was modeled with the existing heterogeneity of the domain having been considered.The influences of both uniform and non-uniform slip distributions were investigated.Furthermore,three levels of simplification for geometric creation of geological layers’boundaries were defined in order to evaluate the effects of the geometric complexity of the geological layering on the displacement responses obtained with the finite element simulations.In addition to the assessment of slip distribution,layering complexity and heterogeneity,the results demonstrate both the capability and usefulness of the proposed models in the dislocation analysis for the Karaj segment of North-Tehran fault.展开更多
文摘A topology optimization formulation is developed to find the stiffest structure with desirable material distribution subjected to seismic loads. Finite element models of the structures are generated and the optimality criteria method is modified using a simple penalty approach and introducing fictitious strain energy to simultaneously consider both material volume and displacement constraints. Different types of shear walls with/without opening are investigated. Additionally, the effects of shear wall-frame interaction for single and coupled shear walls are studied. Gravity and seismic loads are applied to the shear walls so that the definitions provide a practical approach for locating the critical parts of these structures. The results suggest new viewpoints for architectural and structural engineering for placement of openings.
文摘The present study uses the finite element method for simulating the crustal deformation due to the dislocation of a segment of the North-Tehran fault located in the Karaj metropolis region.In this regard,a geological map of Karaj that includes the fault segment is utilized in order to create the geometry of finite element model.First,finite element analysis of homogeneous counterpart of the fault’s domain with two different sections was performed,and the results were compared to those of Okada’s analytical solutions.The fault was modeled with the existing heterogeneity of the domain having been considered.The influences of both uniform and non-uniform slip distributions were investigated.Furthermore,three levels of simplification for geometric creation of geological layers’boundaries were defined in order to evaluate the effects of the geometric complexity of the geological layering on the displacement responses obtained with the finite element simulations.In addition to the assessment of slip distribution,layering complexity and heterogeneity,the results demonstrate both the capability and usefulness of the proposed models in the dislocation analysis for the Karaj segment of North-Tehran fault.
