Research On The Structural Property Of Articulated-connecte Structure And The Application Of Viscoelastic Damper

Over the past twenty years, China has become the main areas of the construction of complex high-rise buildings in the world. Connected structure is more and more popular because of its variety of somatotype and function. The rigid-connect structure and weak-connect structure are the main type of connected-structure. Articulated-connect structure, a new type of connected-structure, was proposed by Prof.Fu Xueyi based on the connected-structure in existence. Articulated-connect structure releases the moments of the corridor which can avoid the sudden change of the stiffness of the floor near the corridor. And the rotations of the corridor enable the damper play a role in seismic energy dissipation.In this paper, the study was carried out by focusing on the articulated-connect structure which was proposed by Prof.Fu Xueyi and the dynamic characteristics and earthquake response of it. The adavantages of the articulated-connect structure compared with the traditional rigid-connect structure, the influence of the span of the corridor, a new type of viscoelastic damper was proposed and its impacts on the articulated-connect structure’earthquake response were emphasized to investigate and discuss.The main research work and creative results were as follows:Dynamic characteristics and earthquake response of articulated-connect structure was studied. The symmetric articulated-connect structure and the unsymmetric articulated-connect structure designed above are compared with the rigid-connect structure of the same plane layout. Modal analysis in frequently occurred earthquake and elastic historical analysis in frequently occurred earthquake to the models are precede. The comparation includes the period,vibration mode, inter story drift angle, top layer displacement, connecting body force and displacement. The results show that the articulated-connect structure and the rigid-connect structure have the similar period and vibration mode, while the tortional mode of the articulated-connect structure lags behind that of the rigid-connect structure. The base shear force and displacement response of the towers have little difference between the two type connect-structures, which indicts that the connection mode has little influence on the stiffness and seismic performance of the tower. The vertical displacement of the articulated-connect structure corridor is larger than that of the rigid-connect structure corridor. By changing the corridor span of the articulated-connect structure, analyse itsinfluence on the seismic resistance behavior of the articulated-connect structure,especially on the seismic reaction of the connecting body. The result shows that with the increasing span of the corridor, the rotational displacement acceleration of the hinge support raise, which makes the vertical acceleration of the midspan very large. The asymmetry of towers will make the results much large, which provide the feasibility of the damper playing the part of energy dissipation and seismic mitigation.A new type of viscoelastic damper- viscoelastic hinge damper was developed. According to the structural characteristics of the articulated connecting structure, a new viscoelastic damper-viscoelastic hinge damper was proposed. Seismic energy can be dissipated by the viscoelastic material among the plates under the earthquake, which can adjust the interal force distribution to make the main loaded components in elastic state. The dampers are arranged in the hinge support of the articulated connecting structure connecting body to weak the vibration of the connecting body. And it can improve the comfort degree,especially to the large span the articulated-connect structure.The effects of viscoelastic hinge damper on the articulated-connect structure’ earthquake response were analysed. Elastic-plastic time history analysis in rarely occurred earthquake to the articulated-connect structure, whose corridor span was 30 meters, are proceede. The response of the connecting body are calculated and analyzed by changing the relevant parameters of the damper.The analysis showed that the increase of the damping coefficient of the connecting part has an obvious effect on the absorption of vibration.