Wind-induced Vibration Control Efficiency Analysis Of High-rise Structure Top With FPS-TMD System

With the rapid development of China’s economy and the application of lightweight high-strength materials,high-rise buildings and high-rise structuresare built with more height and more slenderness.These tall buildings are becoming more and more sensitive to lateral wind loading as result of their characteristics of lightweight and small damping.The wind induced acceleration response obviously increasedunder the strong wind load,in some cases the wind loading is the major control factor for the wind resistant design of such tall buildings.The Fricition Pendulum Syetem(FPS)isolation system,which is commonly used in seismic engineering,is combined with the Tuned Mass Damper(TMD)to form a new type of Fricion Pendulum System typed Tuned Mass Damper(FPS-TMD)passive control system.By installing this innovative system atop of tall building,the efficiency analysis on the wind-induced vibration control of such tall buildings would be conducted in this dissertation,the main outcome obtained from the research study are specified in the following:The mechanical behavior and dynamic characteristics of FPS-TMD system are first theoretically analyzed.The dynamic equation of tall buildings with FPS-TMD system was deduced,the solution method for the dynamic equation and nonlinear wind-induced response of such structural system were proposed in this paper by the modified time history dynamic analysis method.By adopting the harmonic superposition method and research results from the wind tunnel test on Guangzhou New TV Tower,numerical simulation of time historydata for the wind loading on the main structure are conducted.The simplified vertical lumped masses finite model for this high-rise structure is also carried out.The wind-induced response of this simplified model combined with FPS-TMD system were numerically and parametrically analyzed by selecting different structural parameters of FPS-TMD system,such as the mass of FPS-TMD system quality,chute radius and different friction coefficient models.Thewind vibration control efficiency for such structural system was studied by the comparison of numerical analyzed results.It showed that the wind-induced vibration efficiency of the main structure is obviousby selecting the appropriate parameters of FPS-TMD system.Through the combination of a series of analysis cases,the structural behavior and its physical modeling of tall buildings with FPS-TMD systems is established by SAP2000 software.By adopting different control modelings with three dimensional finite element model of Guangzhou New TV Tower,the time history dynamic analysis of wind-induced vibration response of this high-rise structure was conducted by Fast Nonlinear Analyis(FNA)method in SAP2000 with the previous numerical simulated time historical wind loading.The wind vibration control efficiency for different control modeling was analyzed and compared by selecting various structural parameters of FPS-TMD system.The numerical analysis results showed that the wind vibration control efficiency of single massed FPS-TMD system was close to that for FPS-MTMD system with equivalent multiple masses.The Bi-direction FPS-TMD system is more efficient to resist the wind-induced response of the studied building with both along-wind and across-wind responses.The comprehensive numerical studies showed that the FPS-TMD system can effectively reduce the wind-induced vibration response of the main structure,and the FPS-TMD system has good stability and self-resetting and self-centering features.FPS-TMD system can be ultilized as an effective passive control system,and it can be effectively used in the wind resistant design and wind vibration control of tall buildings and high-rise structures.