Passive Energy Dissipation Control Strategies Of High-rise Structures Based On Engineering Cases

The high-rise buildings are developing in the trend of higher height, bigger body, more complex structural type and lighter materials nowadays. The problems of security and human habitability of the buildings appear obvious under severe earthquake and wind. The passive energy dissipation control technology is an economic, effective, reliable and realizable technology of structural vibration control, and it can mitigate the structural displacement and acceleration response effectively. It has great learned value and wide application area for using the passive energy dissipation control technology properly preventing disaster and enhancing the human habitability of buildings.The combinative method with theoretical analysis, experiment study, and project applications has been adopted to research the application strategies of the passive energy dissipation control technology in this dissertation. Two new types of vibration control devices are proposed here, and the vibration control strategies have been annotated by two engineering cases (using these two new vibration control devices proposed in this dissertation) with detailed construction, implementation process and the vibration control effects of the dampers. The characteristics and application methods of all kinds of passive energy dissipation control technology have been proposed. The detailed research contents of this dissertation are shown below:Firstly, the coupling beam damper is developed independently and the detailed construction and usage are proposed. It can be used effectively to solve the problems of hardly reinforcing in the coupling beams of shear wall structures, maintain the stiffness and entirety under minor earthquake excitations, and enhance the coupling beams'damping and ductility under moderate earthquake and major earthquake excitations. The detailed study on lectotype, parameter optimization and layout of coupling beam dampers has been done and the general design method of coupling beam damper has been proposed.Secondly, totally 11 samples of coupling beam damper are tested by pseudo-static tests. The optimum parameters and the constitutive model of the coupling beam damper are found by comprehensively considering the force versus displacement relation, the failure mode, the stability of stiffness, the ultimate bearing capacity and the energy dissipation ability indexes.Thirdly, the pseudo-dynamic substructure test model which contains coupling beam dampers has been set up. The test model contains two parts, the one is the test substructure (coupling beam damper) which is tested on the test table, and the other is the numerical substructure which participates in test by mechanical software calculation. The test model connects the test substructure and the numerical substructure by computer and control systems. Many earthquake excitations test cases under minor earthquake, moderate earthquake and major earthquake are carried through and the energy dissipation ability of coupling beam dampers which are laid in structures is verified by substructure test method. The coupling beam dampers'contribution to the three level of China code earthquake fortification has also verified.Forthly, the usage method and the contribution of coupling beam damper in coupled shear wall structures are studied. The ABAQUS/Explicit analysis model with or without coupling beam dampers are built respectively, and then many cases of structural dynamical elastic-plastic analysis under earthquake excitations are done. After the research, the validity of damping enhancing strategy of coupling beam damper used in shear wall structures under severe earthquake excitations is verified. And the usage of coupling beam damper is shown here.Fifthly, the bending and dislocating damper is developed independently and the detailed construction and usage are proposed. It can be used effectively to enhance the damping of long cantilever or large span lightweight steel structures and mitigate the vibration of these structures under wind and pedestrian load excitations. The mechanism of the bending and dislocating damper is analyzed, then the theoretical model is built and the simplified constitutive model and the method of modelling are presented. Some cases of sample tests of bending and dislocating dampers are taken to validate the theoretical model proposed before, and environment temperature dependence and the loading frequency dependence tests are taken to open out the working performance of bending and dislocating damper under normal circumstance.Sixthly, the usage method in a long cantilever spatial truss systems (which stands on a super high-rise tower) and the vibration control effect of bending and dislocating damper are studied. The realizing method of the bending and dislocating damper in finite element software is studied, and the structural time-history analysis model with or without the bending and dislocating dampers are set up respectively based on the realizing method. The structural wind-induced vibration responses are analyzed under the wind which the return period is ten years. The vibration control effect of the long cantilever truss using bending and dislocating dampers and the contribution to controlling building's human habitability in super high-rise towers are verified.