Analysis On Super Tall Building Structure TMD Vibration Control

In today’s rapid economic development of the society, the progress of scienceand technology made the design and construction of high-rise building have a rapiddevelopment. In recent years, the coastal economically developed cities which have adensely population had appeared a large number of high-rise buildings. And the wideapplication of high strength lightweight materials made the modern high-rise buildingbecame more and more soft when the height is increasing at the same time. How toguarantee and improve the use and safety of tall building structures performancebecome an indispensable topic in tall building structure design. Currently, Tunedmass damper (TMD) is a kind of structure control device in common, this papermainly through a practical engineering, using the finite element analysis software ofSAP2000to establish three-dimensional finite element model, and drawing up withthree different Tuned mass damper scheme such as STMD and MTMD, analyzed thecontrol function of tall building when the TMD system is subjected to the incentivesfrom fluctuating wind and earth-quake, and the following main conclusions:1. Based on the modal analysis of TMD structure control before and after, weconcluded that the basic performance parameters of this structure pointed out that thefirst vibration mode for the translation of X, and determined the TMD system controlmode. Because of comparing with the three different schemes of TMD system, wehave the structure indicates that MTMD can better to control the structure ofmultistage mode than STMD relatively; The TMD system can improve the torsionresistance of the structure significantly, and the MTMD structure is a little better thanSTMD structure.2. According to the random vibration theory, we design the samples of pulsatingwind speed time history which on the tall building for using of matlab programmingsoftware methods according to the autoregressive (AR), and obtained the time historycurve of pulsating wind pressure and fluctuating wind load. Therefore, three kinds ofscheme is analyzed the control effects under the action of wind-induced vibration andit is concluded that: in the case of the parameters of TMD system remains the same,the controlling effects of MTMD is better than that of STMD. However differentarrange-ment of the MTMD structure is different, the control of MTMD system onstructure at the top of the building is the best. In high-rise buildings, when the mass ratio is smaller, putting the MTMD system structure at the top of the structure canmeet the comfort requirements effectively, and better meet the using and function ofthe building structure. In addition, the TMD system can effectively reduce the str-ucture dynamic response from every layer, the control effects are between25%~41%.Therefore, using TMD to control the wind vibration of high-rise building has obviouseffects.3. When under the earthquake excitation, this paper is analyzed from thedynamic response and the energy response of main structure, indicates that TMD iseffective to the seismic responses of the super-tall which structure rules is sym-metrical. If with the aim to control the acceleration response, the project3which set alittle TMD in each strengthening layer is the best method. If with the aim to controldisplacement response, the second scheme which setting the MTMD system on thetop of the buliding is the best. Considering the input energy and the goal of increasingdamping energy dissipation, the three where each strengthening layer set a smallTMD scheme can effectively control the seismic action.