集成黏滞阻尼伸臂减震装置超高层建筑结构续建改造设计OA北大核心CSTPCD

In order to reduce the amount of reconstruction work of existing structures in the continued reconstruction design of the super high-rise building structure,additional viscous damping device can effectively improve the structural energy dissipation under earthquake,so as to reduce the internal force and deformation of the structure.In this paper,the deformation amplification principle of a damped outrigger was studied,the optimal arrangement method of the damped outrigger was introduced,the multi-state matrix for continued reconstruction was proposed,the typical driving factors of the continued reconstruction project were analyzed,the design strategy of the continued reconstruction of the super high-rise building structure with the integrated damped outrigger was summarized,and finally the effectiveness and accuracy of the method was verified with the background of engineering case.The results show that the viscous damping extension arm is suitable for the super high-rise building structure with bending deformation.The deformation amplification coefficient can be approximated as the ratio of span and height of the cell,and the theoretical amplification coefficient is generally 2-3.Using the design method of the damped outrigger,and assuming that damper energy dissipation is unchanged,the ranking of the ability to dissipate energy and additional scheme can be determined by conducing only one round of layout full damping analysis.The frame-core wall structure is mainly characterized by bending deformation,the damped outrigger has the best effect in the middle and high zones,and reduced energy dissipation is realized if being further away from the position.The additional damping ratio provided by adjacent damped outrigger differs by 15％approximately.The additional damping provided by the viscous damper is not always increased by increasing the damping ratio,and there is an optimal integrated design scheme.The integrated design method proposed in this paper not only improves the seismic performance of structures,but also effectively reduces the cost of continued reconstruction,which has practical engineering value.