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Teng J.,Harbin Institute of Technology | Teng J.,ShenZhen Key Laboratory of Urban and Civil Engineering Disaster Prevention and Reduction | Li Z.,Harbin Institute of Technology | Li Z.,ShenZhen Key Laboratory of Urban and Civil Engineering Disaster Prevention and Reduction | And 2 more authors.
Proceedings of the 12th International Symposium on Structural Engineering, ISSE 2012 | Year: 2012

Diagrid tube structures have advantages for constructing high-rise buildings due to their great rigidity, however, the nonlinear seismic performance and failure mode of this kind of structures has not been clearly understood at present. The modal pushover analysis for typical high-rise diagrid tube structure is carried out in this paper and a pseudo-static test is accomplished to research the components yield order, inclined column force, column yield mechanism and diagrid tube seismic failure path, with which the nonlinear seismic performance of high-rise diagrid tube structures is made clearly. The influences of main related factors of structure lateral stiffness on the plasticity developing process are studied also. The plastic energy dissipation is used as the evaluation indicator to analyse the seismic failure mode of typical diagrid tube structure. The analysis results are proposed based on the distribution characteristics of plastic energy dissipation in coupling beam, inclined column, the whole story and different kinds of components. Optimization principle of the structural seismic failure mode is established, then through which the optimal failure mode is obtained. Source


Qiao F.,Harbin Institute of Technology | Qiao F.,ShenZhen Key Laboratory of Urban and Civil Engineering Disaster Prevention and Reduction | Teng J.,Harbin Institute of Technology | Teng J.,ShenZhen Key Laboratory of Urban and Civil Engineering Disaster Prevention and Reduction | And 2 more authors.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2012

After analyzing the limitations of the commonly used pole assignment method, the pole assignment method based on decoupled real modal is proposed in this paper. The displacement vectors in the feedback gain matrix obtained by the given pole assignment method keeps in zero for the characteristics of viscous dampers. Based on the feedback gain, the equivalent optimal control method is applied in optimal design for parameters of viscous dampers. The method based on the damper's dissipated energy that was used in optimal design for location was proposed. The process of optimal design for viscous dampers is conducted. The numerical simulation of a 20-story steel frame structure installed with viscous dampers is used to verified the similarity of the performances and the effectively of the passive-control system and corresponding active-control system. It proves that the process of design is effective and rational. Source


Li Z.,Harbin Institute of Technology | Li Z.,ShenZhen Key Laboratory of Urban and Civil Engineering Disaster Prevention and Reduction | Li A.,Harbin Institute of Technology | Li A.,ShenZhen Key Laboratory of Urban and Civil Engineering Disaster Prevention and Reduction | And 2 more authors.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2012

Based on Irreversible Thermodynamic Theory and continuum damage mechanics, accounting the coupling relation of plastic stain and damage, an internal variable function was supposed between the plastic Helmholtz energy and the elastic Helmholtz energy. The expression of plastic Helmholtz energy was confirmed by proposing an expression of the internal function. Accounting the shape of Weibull distribution, the damage evolution equation of uniaxial compression concrete was deduced by establishing the relation of damage variable and damage energy dissipation rate, which was redefined by the new expression of plastic Helmholtz energy. And an empirical expression of plastic strain was given based on the plastic characteristic of the material. Uniaxial compression test results were used for verification of the model, which can reflect well the nonlinear feature and damage evolution of concrete. Source


Teng J.,Harbin Institute of Technology | Teng J.,ShenZhen Key Laboratory of Urban and Civil Engineering Disaster Prevention and Reduction | Yang M.,Harbin Institute of Technology | Yang M.,ShenZhen Key Laboratory of Urban and Civil Engineering Disaster Prevention and Reduction | And 2 more authors.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2012

The equations of motion for two-DOF base isolation system were established and solved for the displacement transfer function. And a parameter optimization method was proposed by analyzing the amplitude-frequency characteristic of displacement transfer function. Then the formulas to calculate the optimal parameters of isolation layer were derived. A 7 floor base isolation frame was used for numerical simulation. It shows that this parameter optimization method can both reduce the seismic response of main structure and the relative displacement of isolation layer. Source

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