The Application Of Shape Memory Alloy Damper In Seismic Control Of Complex Structure Of The Tower

With the rapid development of materials science, as a new type of functional materials,shape memory alloy (SMA) has a good application prospect in engineering structures,and canalso provides a new way for the research of civil engineering structure vibration controltheory and application method. in this paper, according to the structure of the actual size,folded stupas of the main tower S axis corresponding to two-dimensional analysis. In thefinite element program SAP2000NITI alloy damper with two connection units to thecorresponding parts of the structure.Modal analysis showed that the original structure of the first formation period of0.98s,and when the shape memory alloy damper are both up and down,the formation cycle isreduced to0.96s, low order modal structure show the X and Z to the whole translation and Ydirection of the rotation. Linear elastic phase of the vibration mode decomposition responsespectrum method and dynamic time history analysis method income curve trend roughly thesame, but the time history analysis to calculate the structure of the top roof displacementvalue is larger. The maximum displacement occurred on the top floor of the structure of thesingle common roof, maximum interlayer displacement Angle of mutation is in the fingersbend. The pushover analysis of shape memory alloy damper can slow down the occurrence ofplastic hinge, and the number of plastic hinge is the least when the shape memory alloydamper are In both up and down.function under the condition of shape memory alloy damper,the decrease of the roof top displacement rate can reach more than40%. Shape memory alloydamper role position is different, the top displacement decreases the size of the different,under different seismic action, the top displacement amplitude is also different. Interlayerdisplacement Angle of extremum in both up and down function under the condition of shapememory alloy damper is minimal. Elastic dynamic and the static and elastic-plastic static analysis indicated that the49-54mgirder with conversion and upper connected to109-117m fingers in all function of shapememory alloy damper seismic control effects is the best, the top roof displacement under theaction of control most when el-centol is be role,more than40%.