Real-time Hybrid Test On Wind Vibration Control Of Tall Buildings Based On NI CompactRIO System

Since the past thirty years,the rapid development of economy has promoted the continuous improvement of construction technology and building material performance,and tall buildings have developed very fast in recent years.However,tall buildings in the southeast and south China coastal areas are more prone to extreme typhoon weather.For tall buildings,the characteristics of elongated shape,light weight and low damping make them sensitive to wind loading,which has become the main controlling load that must be considered in the design of wind-resistant structures.In this paper,a Friction Pendulum Tuned Mass Damper(FPS-TMD)is proposed by combining the advantage of the Friction Pendulum System(FPS)limit reset function and the energy dissipation of Tuned Mass Damper(TMD).Taking a 76-storey reinforced concrete building(also named as the third generation Benchmark model for structural control study)as an example,the wind vibration control effect of this tall building with FPS-TMD system is studied,and a real-time hybrid test based on the NI CompactRIO embedded system is constructed for the comparative analysis.The main research contents of this thesis are as follows:By ultilizing LabVIEW and MATLAB/Simulink,the software development environment for real time hybrid test is introduced in detail.The user-friendly interface combined with graphical programming facilitates of Labview could be adopted to promote the software development of real time hybrid test.In this thesis,the SIT toolkit in Labview is used to establish the connection between LabVIEW and MATLAB/Simulink module,and the RTW toolkit is adopted to compile the Simulink model files into DLL modules in real time simulation process.The mechnical properties and dynamic characteristic of FPS-TMD system were first investigated in the thesis.Then the dynamic equation of a tall buiding with FPS-TMD system under wind loading was established,The Newmark-β method was adopted to numerically solve the wind-induced acceleration,velocity and displacement resaponse under wind loading.Taking the 76-storey reinforced concrete Benchmark building as an example,the harmonic superposition method was proposed to simulate the time-histories of fluctuating wind speed and alongwind loading.and the wind vibration control efficiency for the Benchmark building with FPS-TMD system under design wind loading with different return periods were studied by numerical simulation method.The real-time hybrid test principle with small motor shaking table is described,the corresponding motion control algorithm and LabVIEW programming are adopted to implement the interface for the motion control of the linear motor actuator,which including the control of the small motor shaking table to complete a series of operations such as connecting communication,zeroing,starting motion and ending the program.On this basis,a real-time hybrid test hardware platform based on NI CompactRIO embedded system was built,which including FPS-TMD system slideway and slider,small motor vibration table,Kislter sensor,NI CompactRIO controller and its data acquisition module.In this way,the FPS-TMD system was separated from the main structure as a test substructure,and the main structure of Benchmark building was used as a numerical substructure to perform the real-time hybrid tests.The closed-loop velocity control algorithm was adopted to control the motion of the motor shaking table.A series of real-time hybrid tests were conducted for the Benchmark building with FPS-TMD system under different wind loading with 10-year,50-year and 100-year return periods,and the vibration control effect of FPS-TMD system was compared with numerical simulation.At the same time,the effect of FPS-TMD slider mass on the wind vibration control efficiency was studied by adding different additional mass blocks.The comprehensive study showed that the FPS-TMD system plays an obvious effect on the wind vibration control of tall buildings,and the control efficiency obtained from the numerical simulation is close to that obtained from the real-time hybrid test.Meanwhile the time-history of wind-induced displacement,velocity and acceleration response are basically consistent,which verifies the effectiveness of the real-time hybrid test.In this paper,theoretical simulation and real-time hybrid test methods are combined to comprehensively investigate the wind vibration control efficiency of FPS-TMD passive control system for tall buildings.The rationality and accuracy of the real-time hybrid test results with small motor shaking table based on NI CompactRIO system are verified,and the economic cost of full-scale test is effectively reduced.A new methodogy for wind vibration control of tall building with FPS-TMD system by real time hybrid test with small motor shaking table is explored in this study.