动臂式施工塔吊TMD地震响应控制与分析

摘要

Due to the universality and the characteristics of cranes,cranes risk probability is not lower than building structure,so Ifs nessesary to research the crane shock absorption measures although during the construction period,the earthquake risk probability is not high.Based on its dynamic characteristics of cranes and attached to the high-rise building,the dynamic characteristics of the TMD of different schemes on the earthquake response of the tower crane control effect.The results show that:①TMD for tall structures of cranes seismic vibration control is effective.②In order to control cranes tower deflection of lateral and vertical vibration boom,set up in the tower at the top of the two-way TMD can't only effectively reduce the deflection of the tower,but also can indirectly effectively control the crane boom vertical vibration.③The TMD device has a good control effect on the tower crane body,but it also has a good control effect for the boom,so the TMD device can be used in the super high-rise building on the construction tower crane,but for the tower body's vibration control still need further study.%虽然建筑施工周期内地震致险概率并不高,但是由于塔吊使用极其广泛,塔吊致险概率并不低于建筑结构,故而针对塔吊的减震措施亟需研究.本文以某实际超高层建筑施工使用的动臂式塔吊为研究对象,根据塔吊自身和附着于超高层建筑后的动力特性,研究了TMD装置的不同方案对塔吊地震响应的控制效果.结果表明:①TMD装置对于属于高耸结构的塔吊减震控制非常有效;②设置在塔身顶部的双向TMD不仅可以有效减小塔身偏摆,也可以间接有效地控制起重臂的竖向振动;③由于超高层建筑-塔吊结构高阶振型影响明显,此TMD装置对塔吊塔身控制效果不稳定,但对于起重臂仍能起到良好的控制作用,故而此TMD装置可以使用在附着在超高层建筑上的施工塔吊,对于塔身的振动控制仍需进一步研究.