A tall and slender structure will have relatively large lateral deformation under the action of lateral wind load and seismic load, and the structure's lateral stiffness is rather small, so the second-order effect...
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A tall and slender structure will have relatively large lateral deformation under the action of lateral wind load and seismic load, and the structure's lateral stiffness is rather small, so the second-order effect should be obvious. The second-order analysis of an asymmetric and tall steel tower is introduced, and the results between this second-order analysis and its linear analysis are compared. The comparison shows that the second-order analysis is necessary and important, and at the same time it demonstrates that the design of this tower is safe.
Taking a desulfurizing tower for example, the reinforcement method of a rectangular opening in large cylindrical shell structure subjected to axial compression together with internal hydrostatic pressure is studied on...
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Taking a desulfurizing tower for example, the reinforcement method of a rectangular opening in large cylindrical shell structure subjected to axial compression together with internal hydrostatic pressure is studied on the basis of finite element method. The stress distribution regularity in opening region and reinforcement effect is investigated on the basis of different reinforcement methods. Furthermore, the comparison of stress and steel consumption between different reinforcement methods is performed, then an economic and rational reinforcement method and the determination of dimension of reinforcement are proposed.
In this paper, based on the mode curvature method and the artificial neural network technology, a new method for damage localization for long-span spatial lattice structures is introduced. Through the investigation an...
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In this paper, based on the mode curvature method and the artificial neural network technology, a new method for damage localization for long-span spatial lattice structures is introduced. Through the investigation and comparison, the parameters suitable for the damage localization of the long-span spatial lattice structures are determined, and the different damage cases for a long-span cantilever tubular truss structure of the stadium in Tianjin Olympic Sport Center are numerically simulated to verify the applicability and effectiveness of the established damage localization method.
The performance of the box-column(without stiffing plates inside) and H beam joint at the tension region of the beam flange was first *** the simplified model for analysis was established and twenty models were analys...
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The performance of the box-column(without stiffing plates inside) and H beam joint at the tension region of the beam flange was first *** the simplified model for analysis was established and twenty models were analysed with the nonlinear finite element *** the impact of the width of the beam flange,the thickness of the column flange and the axial load ratio of the column on the behavior of the joint were also discussed. Finally,the ruling condition of the load-carrying capacity of the joint was established,according to which the formula to calculate the bearing capacity of the joint was suggested and the results from the suggested formula and FEM analysis were compared.
A new model for the second order elastic-plastic analysis of plane steel structures was presented by replacing the general element with a new one, which has two rotational springs at its ends. Revising its rotation di...
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A new model for the second order elastic-plastic analysis of plane steel structures was presented by replacing the general element with a new one, which has two rotational springs at its ends. Revising its rotation displacement equation, the second order elastic-plastic stiffness matrix of this kind of structure was derived. And the second order elastic-plastic program of this structure was worked out. Three steel frames were calculated with this program. The calculation results show that this model is reliable and fit to the analysis of all plane steel structures.
The traditional and modified effective length methods are reviewed, and the limitations in the application of modified effective length approach are outlined. Based on the story buckling approach of frames, a universa...
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The traditional and modified effective length methods are reviewed, and the limitations in the application of modified effective length approach are outlined. Based on the story buckling approach of frames, a universal slenderness and story stability coefficient for a frame story are defined. A large number of frames are analyzed to acquire their limit loads using ANSYS. Residual stresses and initial geometrical imperfections are considered. The limit loads are correlated with the universal slenderness. It is found that when the universal slenderness is intermediate, there exists an unfavorable interaction between sway buckling and non-sway buckling of frames. A reduction factor of ultimate load capacity is introduced to consider the buckling interaction, and formulae according to the column curves in the Code GB50017 are suggested to predict the story stability coefficient.
A new type of joint between Concrete-filled Square Steel Tube column and H-type steel beam is proposed in the paper, and the seismic behavior of this type of joint under low-reversed cyclic loading test is researched....
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A new type of joint between Concrete-filled Square Steel Tube column and H-type steel beam is proposed in the paper, and the seismic behavior of this type of joint under low-reversed cyclic loading test is researched. Ductility behavior, dissipation of seismic energy, degeneration of intensity and stiffness of the joint between Concrete-filled Square Steel Tube columns and steel beam under low-frequency, horizontal, repeat load are analyzed. Hysteretic curves to these four joint specimens between displacement and repeat load, together with corresponding framework curve is shown.
On the basis of uniaxial compression tests on 18 short column specimens, the ultimate bearing capacity of shale ceramisite concrete filled steel tubular short column is analyzed. The results have been compared with co...
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On the basis of uniaxial compression tests on 18 short column specimens, the ultimate bearing capacity of shale ceramisite concrete filled steel tubular short column is analyzed. The results have been compared with common concrete filled steel tubular columns. The ultimate bearing capacity formula of shale ceramisite concrete filled steel tubular short columns is derived by the limit equilibrium method. According to the good agreement between the calculated results and experimental data, reference can be proposed for the engineering application of the lightweight concrete.
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