Active Fm Pressure Liquid Column Damper To Vibration Control Of Asymmetric Structures

Human security and survival has been facing challenges brought about by earthquake and wind, so how to take appropriate measures against the losses caused by this general arbitrary dynamic loads has been the research trends of vibration control that we are exploring and pursuing.Since1972, Yao [1] proposed the concept of structural vibration control, with the growing recent structural dynamics in the depth and breadth and the rapid development of computer technologies and concepts, the design of building structural vibration control came into being, which provide us an effective way in resisting earthquake and wind load. Hence, the structural vibration control in recent years increasingly attacted widespread attention and became a seismic forefront of science, which has better prospects for research.Nowadays, it is known that the control devices include active tuned mass damper (ATMD), active tuned liquid damper (ATLD) and active tuned liquid column damper (ATLCD) and so on, all of which have better prospects. However, a lot of experimental studies is also needed so as to conduct in-depth exploration.This paper mainly discusses the control effect of active tuned liquid column gas damper (ATLCGD) installed on the asymmetric buildings. First, the characteristics and working principles of the active tuned liquid column gas damper are studied, which is a new type of damper evolved from the tuned liquid column gas damper (TLCGD). ATLCGD includes the advantages of TLCGD, that the U/V-shaped plume the damper cloesd pressure, expanded its scope of use and extended the frequency to5Hz which can improve the effective damping of the structure. Additionally, ATLCGD adds an gas chamber at the end of the U/V-shaped liquid column, which exerts active control to the main structure using external energy to adjust the pressure in the gas chamber at the end of the liquid column, which performs better in resisting the structural vibration[2]. What’s more, based on classic linear quadratic regulator (LQR) algorithm, the seismic behavior of plan-asymmetric buildings installed Active Tuned Liquid Column Gas Damper (ATLCGD) is numerically simulated and studied. It is concluded that the plan-asymmetric buildings installed ATLCGD performs better in resisting earthquake loads and has a superior effect than TLCGD on controlling the structure.